Coated Steel Sheets

Transcription

Coated Steel Sheets

Flat Products
Coated Steel Sheets
Hot-dip Galvanized Sheets, Electrogalvanized Sheets
and Precoated Sheets
http://www.nssmc.com/
2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 Japan
Tel: +81-3-6867-4111
Coated Steel Sheets
U008en_01_201211f
© 2012 NIPPON STEEL & SUMITOMO METAL CORPORATION
Coated Steel Sheets of Nippon Steel & Sumitomo Metal Corporation
Steel sheets are applied throughout a broad spectrum of
life and industry—including automobiles, home electric
appliances, building materials, housing, beverage cans,
and transformers. Economic growth in the emerging
countries and other parts of the world has spurred an
expansion in steel sheet use.
By its speedy response to a wide range of needs and
its rich line-up of products, Nippon Steel & Sumitomo
Metal Corporation is renowned for its coated steel sheets.
Nippon Steel & Sumitomo Metal develops and markets
high-performance steel materials capable of responding to
increasingly stringent needs, such as growing concern for
the environment and energy conservation.
Coated steel sheets, in particular, are required to
possess not only rust resistance but press formability,
weldability, paintability, and various other properties as
well. In addition to metallurgy, a growing diversity of other
technologies is indispensable for meeting these needs.
They include electro-chemistry, thin-film engineering, paint
engineering, interface engineering, corrosion science,
thermal technology, and alloying control (dif fusion)
technology. In the case of coated steel sheets, if any of
these technologies is lacking, customer needs cannot be
fulfilled.
Nippon Steel & Sumitomo Metal has outstanding
command of these various elemental technologies and
continues to develop products that precisely meet the
performance requirements of its customers.
Civil
engineering
structure
Building
structural
member
Hot-dip galvanizing line
Heater
Road fence
Electrogalvanizing line
Microwave oven
Kitchen stove
DURGRIPTM
Hot-dip galvannealed steel sheet and strip
DURGRIPTM
Roof, wall
Hot-dip galvanized steel sheet and strip
Housing
structural
member
Duct
Air conditioner
(outdoor unit)
Washing
machine
Refrigerator
SuperDymaTM
Hot-dip zinc-aluminum-magnesium-silicon alloy coated steel sheet and strip
Hot-dip galvanized steel sheets
●
Advanced control over the coating atmosphere secures adhesion of the zinc to the
base metal, thereby ensuring good workability. These products are used mainly in home
electric appliances and building materials.
GALVALUME STEEL SHEETTM
Hot-dip 55% aluminum-zinc alloy-coated steel sheet and strip
ALSHEETTM
Automatic
vending
machine
Hot-dip aluminum-coated steel sheet and strip
Automobile
ECOKOTETM-S
Deck plate
Greenhouse
Steel furniture
Sn-Zn coated steel sheet and strip
Washing
machine
Tank roof
Building
Air conditioner structural
(outdoor unit)
member
Refrigerator
Housing
structural
member
ZINKOTETM COLOR
Precoated Sheets
Pre-Coating Steel Sheet and Strip
VIEWKOTETM
ZINKOTETM
Electrolytic zinc-coated steel sheet and strip
DURZINKLITETM
Electrolytic zinc-nickel
alloy-coated steel sheet and strip
Electrogalvanized steel sheets
AV equipment
Office
equipment
Precision
machine
AV equipment Copying
machine
Steel furniture
ECOTRIOTM
Zn-Si-Ni alloy coated steel sheet and strip
●
The surface texture is uniform and beautiful.
The lack of heat treatment during the coating process helps to retain the properties of
the base metal. These products are used
mainly in home electric appliances for
indoor use.
Notice: While ever y ef for t has been made to ensure the accuracy of the
information contained within this publication, the use of the information is at the
reader´s risk and no warranty is implied or expressed by Nippon Steel & Sumitomo
Metal Corporation with respect to the use of the information contained herein. The
information in this publication is subject to change or modification without notice.
Please contact the Nippon Steel & Sumitomo Metal Corporation office for the latest
information.
SUPERNICKELTM
Nickel Coated Steel Sheet and strip
Please refrain from unauthorized reproduction or copying of the contents of this
publication.
The names of our products and services shown in this publication are trademarks
or registered trademarks of Nippon Steel & Sumitomo Metal Corporation, affiliated companies, or third parties granting rights to Nippon Steel & Sumitomo Metal
Corporation or affiliated companies. Other product or service names shown may
be trademarks or registered trademarks of their respective owners.
Copying
machine
Office
equipment
Battery cell
Washing
machine
Heater
Refrigerator
Kitchen stove
Air conditioner
(outdoor unit)
Automobile
1
Lineup of Coated Steel Sheets of Nippon Steel & Sumitomo Metal
Available sizes
Type
Brand name
Electrogalvanized sheet
0.3
610
50
2.0
1,250
10
0.4
600
40
3.2
1,650
10
0.4
600
40
2.3
1,650
4
0.15
580
15
1.0
1,024
1
0.15
25
∼
4（μm）
0.8
1,000
10
0.4
600
∼
40
0.8
1,650
0.3
25
EG type
10 ∼ 40
CG type
60 ∼ 150
∼
Precoated sheet
30
∼
Zn
1,250
∼
Base
metal
2.5
∼
VIEWKOTETM
20g/m2(2.8μm)
Polyester, etc.
(25μm)
160
∼
Zn
610
∼
Topcoat
0.3
∼
COLOR
Base
metal
40
∼
ZINKOTE
Base
metal
1,230
∼
TM
Fe-Ni alloy
Ni layer
1.6
∼
SUPERNICKEL
TM
Base
metal
170
∼
Nickel Coated
Steel Sheet and strip
Zn-Sn-Ni alloy
Special film
610
∼
ECOTRIOTM
Base
metal
0.25
∼
Zn-Si-Ni alloy coated
steel sheet and strip
Zn-Ni alloy
20g/m2 (2.8μm)
90
∼
DURZINKLITETM
1,700
∼
Electrolytic zinc-nickel alloy-coated
Base
metal
9.0
∼
ZINKOTE
TM
275
∼
Zn
20g/m2 (2.8μm)
Electrolytic zinc-coated
580
∼
Special film
0.27
∼
Base
metal
Sn-Zn layer
60
∼
ECOKOTETM-S
Base
metal
1,840
∼
Al-Si alloy
50g/m2 (18.5μm)
6.0
∼
ALSHEETTM
Base
metal
600
∼
Hot-dip aluminum-coated steel
sheet and strip
Zn-55%Al alloy
78g/m2 (21μm)
580
∼
GALVALUME
STEEL SHEETTM
0.23
∼
Hot-dip 55% aluminum-zinc
alloy-coated
Base
metal
60
∼
SuperDymaTM
Zn-Al (11%)
-Mg (3%)
-Si (0.2%)
1,850
∼
Hot-dip zinc-aluminummagnesium-silicon alloy coated
4.5
∼
DURGRIP
Base
metal
120
∼
Zn
120g/m2(17μm)
TM
610
∼
Hot-dip galvanized
Base
metal
0.5
∼
DURGRIPTM
30
Width（mm）
∼
Zn-Fe alloyed
45g/m2(6μm)
Coating mass Plate thickness
（g/m2）
(mm)
∼
Hot-dip galvannealed
Hot-dip galvanized sheet
Coating structure
(representative example)
1.2
1,300
Features
Corrosion resistance
Press formability
Weldability
Paint adhesion
No
treatment
○
○
Post treatment
Chromate-free treatment
General Lubricating Other special
treatments
̶
○
○
○
Main applications
Introduction
page
̶
Automobile outer and inner panels
home appliance
Structural member (shutter)
Steel furniture, automatic vending
machine
5
○
Structural member (house, civil
engineering structure, road member)
home appliance
Automatic vending machine
6
7
(30 times higher than common galvanized sheet)
Cut-edge surface corrosion resistance
Alkaline resistance
Scratch resistance
○
○
○
○
Structural member (house,
agriculture/stockbreeding structure,
solar panel supporting structure, civil
engineering/road structure),
home appliance, automobile parts
Automatic vending machine
(3~6 times higher than common galvanized sheet)
Thermal resistance, heat reflectivity
Decorativeness (spangle)
○
○
○
○
Structural member
(civil engineering/
road structure)
8
Chemical resistance
Decorativeness (aluminum)
○
○
̶
○
Automobile exhaust system parts
Heating equipment
Toaster, hot-water system
9
Corrosion resistance (bio fuel)
Fuel non-permeable property
○
○
̶
̶
Fuel tank
10
Conductivity
Lubricity, formability
Fingerprint resistance
Scratch resistance
Paint adhesion
*Diverse post-treatment menu
○
○
○
○
AV equipment, electronic device
home appliance
OA equipment
11
Weldability
Paint adhesion
○
○
○
○
home appliance
Housing equipment
13
Whisker resistance
Solder wettability
○
○
̶
̶
OA equipment
14
Corrosion resistance (particularly after forming)
Coating adhesion
Decorativeness (luster)
̶
○
̶
̶
Battery
Heating equipment
15
○
home appliance
OA equipment
Housing equipment (interior,
steel furniture)
12
○
home appliance, AV equipment,
electronic device
Fuel cell
Housing equipment (steel
furniture, door, kitchen, bath)
16
Decorativeness, corrosion resistance, elimination
of coating process at user plant
(reduction of production process, cost cutting)
*Different properties depending on the type
Decorativeness, corrosion resistance, elimination
of coating process at user plant
*Preparation of a variety of product types: high heat
absorption, high reflection, self cleaning, deep-drawable
metallic, antistatic, grainy, orange-peel-surfaced
○
̶
○
○
̶
○
Information about environmental load chemical substances contained in the products
of Nippon Steel & Sumitomo Metal Corporation is supplied in the form shown below:
1) Material Safety Data Sheet (MSDS)
2) Information about specified chemical substance content (supplementary MSDS)
3) Specified Chemical Substances Data Sheet (SSDS)
For more details, please confirm by accessing our website: http://www.nssmc.com/.
2
3
DURGRIPTM
◆Production Process
Hot-dip galvannealed steel sheet and strip
Limestone
◆ Main Characteristics
Oxygen
blowing
Iron ore
Sintering plant
Basic-oxygen
furnace
Molten iron
Coal
Coking plant
Continuous casting
Blast furnace
• Excellent paint adhesion and weldability—provided by reheating
the zinc-iron alloyed layer produced by heating
• Exceptional post-painting corrosion resistance
• Excellent press-formability, ranging from bending to deep
drawing
• Availability of sheet with highly lubricative film treatment
Secondary refining
Zn-Fe alloy layer
Base metal
Lubricative film
Zn-Fe alloy layer
Non-treatment type
●
Base metal
Lubricative
Coating structure
film-treated type
◆Typical Properties
Paint Adhesion
Press Formability
Reheating
The application of lubricative film treatment imparts good press formability.
Pickling line
Continuous hot-rolling mill
•Examples of Paint Adhesion (Primary Adhesion)
GA (Lubricative film treatment)
Forming tolerance
Temper rolling mill
25kN
20kN
×: Split
〇: Pass
×: Split
Cold-rolled coil
Cold-rolling mill
15kN
×: Split
25kN
〇: Pass
10kN
DURGRIP (Galvannealed)
Cold-rolled sheet
7kN
×: Creased
〇: Pass
15kN
×: Creased
7kN
Treatment condition : Dip-type phosphate treatment
Cation ED 20μ baking
Assessment test
: After drawing grid pattern
Erichsen stretch forming, cellophane
tape peeling off
Forming tolerance
(blank folding force)
GA (no treatment)
Pickled coil
Galvanized sheet
10kN
〇: Pass
DURGRIP has a finely textured yet rugged surface, ensuring good
paint adhesion.
3mm
Stretching
5mm
Weldability
Hot-dip galvanizing line
Welder
Skin pass
Post
treatment
equipment
Tension leveler
Pay-off reel
The resistance weldability of galvanized steel sheet, in contrast to that
of cold-rolled steel sheet, generally requires appropriate welding conditions in the region of high heat input. This is because zinc is a soft
metal that easily conforms to the partner metal and because zinc’s low
melting point causes it to melt and spread out during the initial welding
stage, thereby resulting in lower current density. Consequently, less
heat is generated in the overlapped areas.
Tension reel
Heat Galvanizing
treatment
bath
• Examples of Surface Appearance of Base Substrate Sheet before
Coating (Scanning Electron Microscope × 1,000)
DURGRIP (galvanized)
DURGRIP (Galvannealed)
Cold-rolled sheet
Direct Spot Weldability
Electrogalvanizing line
Cleaning
tank
Post
Drying
treatment
Shear
The appropriate welding conditions for coated steel sheets are shown
in the figure below. Adequate welding current regions for coated steel
sheets are higher than those for cold-rolled steel sheets.
◆Main Applications
• Electric appliances
Welder
Continuous annealing line
Galvanizing
bath
•Example of Appropriate Welding Conditions for Galvanized Sheet
t=0.8mm
Electrode: Circular type, 5.0 mmø
Weld time: 10∞
13
Coil
Welding current (kA)
12
plate, side plate, back plate, bottom plate, parts)
• Building and furniture
Signboard, door, sash, shutter, cabinet, steel furniture, office equipment
Occurrence of expulsion
11
10
Washing machine, refrigerator, air conditioner, automatic vending machine (outer
DURGRIP
(galvanized)(90/90)
• Automobile (outer, inner, parts)
DURGRIP
(Galvannealed)(90/90)
Hood outer, inner
Pillar outer
Appropriate range (base metal fracture)
9
8
Trunk lid outer, inner
Cowl panel
Cold-rolled sheet
Quarter panel
7
6
Wheel house Outer
Shortage of strength
200
250
300
400
Locker outer,
inner
Welding pressure (Kg)
t=0.8mm
Front floor
Front fender
4
Door outer
Door inner
5
DURGRIPTM
SuperDymaTM
Hot-dip galvanized steel sheet and strip
Hot-dip zinc-aluminum-magnesium-silicon alloy coated steel sheet and strip
• High corrosion, and rust resistance similar to that of
conventional chromate-treated sheet even with chromatefree treatment
• Excellent zinc adhesion and responsiveness to severe
fabrication conditions
• Product lineup with excellent tribological properties by
means of chromate-free treatment
Zn
Zn-Fe alloy layer
Base metal
metal
Base
Chromate-free
special film
Lubricative film
Zn
Zn-Fe alloy layer
●
Base
Base metal
metal
Coating structure
Chromate-free hot-dip
galvanized sheet
Corrosion Resistance Mechanism of Conventional Chromate Treatment
and Chromate-free Coating Film
• Civil engineering structure and building
construction
• With remarkably high corrosion resistance compared to hot-dip galvanized
steel sheet, inhibits corrosion resistance in cut-end surfaces
• Strong alkaline resistance even in direct contact with mortar and concrete
• Superior substitute for stainless steel (weak in chlorine resistance) and
aluminum (weak in alkaline resistance)
• Availability of chromate-free sheet having properties similar to those of
chromate-treated sheet
Coating Layer Composition and Corrosion Resistance
(Salt Spray Tests)
Chromate Coating Film
①
Shutting out of
corrosion factors
Chromate-free Coating Film
Corrosion factor
Coating film
H2O
①
③
wall, scaffolding pipe, light-gauge shape, shutter,
Coating
adhesiveness
Coating film
O2
sash, door, housing structural member (column,
beam)
Shutting out of
corrosion factors
③
Coating
adhesiveness
• Automobile
Floor, various parts
②
②
Self-restorative
function
Zinc coating layer
Corrosionsuppression
function
Processed/
injured section
Steel sheet
Steel sheet
Chromate coating film
When this film is injured, soluble hexavalent chromium
leaches out to offer a “self-restorative function” that repairs
the film.
Function of Chromate Coating Film
r#BSSJFSFffect
r4FMGrestoration function
Zinc coating layer
• Shipbuilding
R e f r i g e r a t o r, w a s h i n g m a c h i n e , h e a t i n g
equipment, air conditioner, automatic vending
Corrosion Resistance Mechanism of Chromate-free
Coating Film : Chromate-free film uses substances selected
because they provide the characteristic features of chromate
film such as its barrier effect, self-restorative function and
paint adhesiveness. Chromate-free coated sheet has been
realized by use of this special coating film.
Effects similar to those offered by
special coating film containing corrosion-suppression agent
1.02
SuperDyma
Zn-11%Al-3%Mg-0.2%Si
0.034
(Reference)
In case of no addition of Si
Zn-11%Al-3%Mg
GALVALUME STEEL SHEET
Zn-55%Al
Duct, panel
Special coating film
machine, showcase parts
• Industrial machinery
Container for transporting agricultural product,
0.060
Surface treatment: No treatment
0.028
0.000
0.100
0.200
0.300
100
DURGRIP
(galvanized)
1
2
3
40
SuperDyma K18
20
Hot-dip Zn-coated
sheet Z27
2
4
6
8
12.5
12
10
14
pH
Zn-coated sheets.
Scratch Resistance
various parts requiring corrosion resistance
Corrosion Protection Mechanism on Cut-end Surfaces and
at Welded Sections
SuperDyma
Repaired section
Coating layer
The coating layer of SuperDyma is hard, thus offering high scratch
resistance.
Hot-dip Zn-coated
sheet
Coating layer
GALVALUME
STEEL SHEET
Iron
Load: 0.098 N
Red rust
Iron
Iron
0
20
40
60
80
100
Vicher’s hardness (Hv)
120
140
4
As the zinc coating mass increases, the corrosion resistance of the hot-dip galvanized sheet is
extended.
•Zinc Coating Mass and Time up to Occurrence of Red Rust (Example) (Salt Spray Test)
Testing condition (JIS Z 2371)
Room temperature : 35˚C
Saline solution : 5%
Middle period
(6 months~several years)
Zinc Coating Mass and Corrosion Resistance
Moisture
Coating layer
composition
Lapping of
coating layer
composition
Coating layer
Moisture
Sacrificed corrosion-protection effect
Iron
Lapping of coating
layer composition
Iron
Iron
Bridge (cable rack)
300
Automobile parts
200
100
50
100
150
Coating mass (one side:g/m2)
200
Latter period
(Several years~Until zinc around
the cut-end surface is lost)
Time up to occurrence of red rust (Hrs)
GALVALUME STEEL SHEET AZ150
60
The corrosion resistance of SuperDyma (assessed by salt-spray tests to
Period (years)
6
80
determine corrosion rate) is extremely high — about 30 times that of hot-dip
Initial period
(5 days~6 months)
Corrosion loss(g/m2)
ZINKOTE
pH4~6 : Acid rain environment
pH9~14 : Cattle and compost shed environment
pH12.5 : Mortar and concrete environment
0
Corrosion Resistance of Flat Surfaces
Cold-rolled
sheet
Phosphate-treated sheet
(5% NaCl solution, 24 hours)
100
0
• Corrosion Protection Mechanism at Cut-end Surfaces
200
Coating structure
0.400
Corrosion loss rate (g/m2/hr)
t&YBNQMFPG0VUEPPS&YQPTVSF8FBUIFSJOH5FTUT4BMU4QSBZ5FTUT
300
Base metal
●
120
Hot-dip zinc-coated sheet
Zn
• Electric appliance
(containing corrosion-suppression agent)
Chromate-free special film
Zn-Al-Mg-Si
Acid and Alkaline Resistance of Various Coated Sheets
Corrosion loss (g/m2/side)
duct, roofing material, fence, sound-insulation
Base metal
Guard rail, corrugated pipe, spiral pipe, deck plate,
t4USVDUVSFBOE'VODUJPOPG$PBUJOH'JMNT
Zn-Al-Mg-Si
Protection film
Coating layer
Iron
Iron
Iron
Air-conditioner
outer unit
(bottom plate)
Compost house (roof, frame)
7
GALVALUME STEEL SHEETTM
ALSHEETTM
Hot-dip 55% aluminum-zinc alloy-coated steel sheet and strip
Hot-dip aluminum-coated steel sheet and strip
• Excellent durability and corrosion resistance
• Beautiful silvery white appearance with a finely spangled
pattern
• Excellent thermal resistance and high heat reflectivity due to
aluminum contained in the coating
• Available with chromate-free film
Zn-55%Al
Base metal
Zn-55%Al
Al-Si
Base metal
Al-Si
Base metal
Base metal
●
Coating structure
●
Coating structure
Heat Reflectivity
Thermal Resistance
GALVALUME STEEL SHEET has high aluminum content, 55% of
mass and 80% of capacity, and shows better thermal resistance than
ordinary hot-dip galvanized steel sheets. Even when exposed to high
air temperatures, it shows neither significant increase of mass due to
oxidization nor any surface discoloration due to progressive alloying.
When used for many hours under temperatures around 350˚C, it
undergoes little change.
The figure below shows the change in mass when steel sheets are
continuously heated in the atmosphere. It is evident that GALVALUME
STEEL SHEET undergoes less change due to oxidization than hot-dip
galvanized steel sheet.
•Example of Oxidation Amount due to Continuous Heating
Thermal Resistance
The surfaces of GALVALUME STEEL SHEET exhibit excellent heat
reflectivity, showing no substantial deterioration after long-term
exposure to high temperatures. Materials with high heat reflectivity
show a minimal rise in temperature. The use of materials with high
heat reflectivity particularly in roofing subjected to large thermal loads
is highly effective in preventing increases in indoor temperature.
B e c a u s e o f t h e c o m b i n a t i o n o f t h i s p ro p e r t y w i t h t h e
aforementioned excellent heat reflectivity, GALVALUME STEEL SHEET
is suitable for such applications as the heat shields and the heat
reflectors for toasters and microwave ovens.
The surface appearance of ALSHEET at high temperatures is far
superior to that of hot-dip galvanized steel sheet or that of coldrolled steel sheet. No surface discoloration occurs at 350˚C or under.
At temperatures above that, the surface becomes an Al-Fe alloy,
causing a discoloration. However, this conversion to an alloy prevents
oxidization of the base metal, helping to retain the steel sheet’s thermal
resistance.
•An example of surface conditions after heating (300°C × 200 hours)
When heated at temperatures below 350°C, ALSHEET undergoes no surface
discoloration, retaining its beautiful appearance.
• Example of Comparison of Heat Reflectivity between GALVALUME
STEEL SHEET and Hot-dip Galvanized Sheet (3 years after construction)
10
• Outstanding weather resistance and corrosion resistance
• Discoloration and high thermal resistance in high-temperature
application
• Excellent high-temperature heat reflectivity, compared to hotdip galvanized steel sheets
Hot-dip galvanized sheet [Z 25](400˚C)
Solar radiation
850W/m2
(no wind)
9
0
Because ALSHEET, like aluminum, easily generates fine yet stable
oxide and hydroxide films in the atmosphere and in water, its corrosion
resistance under various conditions is superior to that of galvanized
steel sheets. In application, however, it should be borne in mind that,
contrary to galvanized steel sheet, galvanic action (sacrificial action)
cannot be expected of ALSHEET.
•Cyclic wetting and drying tests (Resistance to exhaust gas corrosion)
As a result of corrosion tests using automobile exhaust gas-condensed
simulated fluids, ALSHEET demonstrates better corrosion resistance than do
electrogalvanized steel sheets and cold-rolled steel sheets.
•Example of Muffler Test Result (Chrysler's Spec 461H-83)
Cold-rolled sheet set as 100
Type
Solar radiation
850W/m2
(no wind)
0
Corrosion rate (%)
50
100
22.9%
18%Cr stainless steel
Oxidation amount（g/cm2）
8
7
50
50
100
100
150
150
W/m2
W/m2
6
5
4
GALVALUME STEEL SHEET [AZ 150](400˚C)
3
27.5%
13%Cr stainless steel
30.1%（16m）*
ALSHEET 80g/m2
Electrogalvanized sheet
20/20g/m2
ALSHEET
Hot-dip galvanized sheet Electrogalvanized sheet
92.8%（80m）※
Cold-rolled sheet
100%（87m）※
Cold-rolled shee
2
GALVALUME STEEL SHEET [AZ 150](300˚C)
0
100
200
300
400
500
600
700
800
900
Note: Data of Bluescope Lysaght
•Example of Heat Reflectivity of Various Roofing Materials
Oxidation time (hours)
Corrosion Resistance
•Example of Red Rust Occurrence Time
(AZ150)
Materials
Heat Reflectivity (%)
GALVALUME STEEL SHEET (no coating)
70 – 75
Prepainted sheet (light color, brightness 6.0 – 8.5)
30 – 70
Prepainted sheet (deep color, brightness 4.5 ‒ 7.0)
15 – 40
Tile, slate (light color)
20 – 30
Tile, slate (dark color)
10 – 20
Concrete, cement
20 – 30
Cut-end surface protection
（Z27）
0
1,000
* ( ): Corrosion loss
Heat reflectivity
［Z 25］
（300°C）
1
30 – 40
Because of its extremely beautiful surface, ALSHEET shows
exceptional heat reflectivity—nearly 80% at temperatures of 450°C or
below. Accordingly, ALSHEET is ideal for use in applications requiring
heat reflectivity, including the inner heat shields for toasters and the
upper reflectors for gas ovens and kerosene heaters.
•Example of Heat Reflectivity of Various Materials
Material
Item
Heat
reflectivity
Test
condition
ALSHEET
Spangled
Non-spangled
(
)
100˚C×24Hrs
90
95
95
95
400˚C×24Hrs
80
30
20
20
2,000
1% red rust occurrence time (hours)
3,000
• Building construction and civil
engineering structure
•D and S AERP emissivity meter (measurement wave 3 – 30m)
Unlike zinc, aluminum has the property of being resistant to weak
acidity and vulnerable to alkalinity.
ZINKOTE
electrogalvanized
sheet
•Measurement at room temperature after heating
(unit:%)
Chemical resistance
• Hot-water system
• Oven toaster
• Bread machine
• Stove
• Fan heater
• Cloth dryer
• Automobile
(muffler, manifold cover,
converter cover)
Roofing material, wall material, partition,
other structural metal fittings
• Electric appliance
Refrigerator, washing machine, air
conditioner, automatic vending machine,
showcase, range, stove, microwave oven
8
9
ECOKOTETM-S
ZINKOTETM
Electrolytic zinc-coated steel sheet and strip
• Higher corrosion resistance than found in conventional fuel
tank metallic materials
• High corrosion resistance, even when used with bio fuels
• Meets hydrocarbon permeation regulations; is free of
environmental load substances
• Highly recyclable
• Demonstrates similar effects in application as chromate-treated sheet
due to ZINKOTE’s special film containing a corrosion inhibitor
• Availability of characteristic properties that conform to respective
customer needs thanks to ZINKOTE’s diverse post-treatment lineup
Sn-Zn alloy layer
Pretreatment
Base metal
●
Coating structure
Responsiveness to Environmental Preservation: ECOKOTE -S is most suitable for use as an eco-friendly fuel
tank material.
①
Automobile
Recycling Law
TM
Inferior recyclability
Lighter weight by use of steel’s rigidity instead of identical capacity
Use of lead
No inclusion of environment burden substance
Concerns about corrosion resistance
in case of using common bio fuel
Inner surface corrosion resistance
Zinc coating
layer
• Main End Products Employing ZINKOTE
because they provide the characteristic features of chromate
film such as its barrier effect, self-restorative function and
paint adhesiveness. Chromate-free coated sheet has been
realized by use of this special coating film.
Application (example)
Application member
Flat panel display
Chassis, various parts
Effects similar to those offered by special coating
film containing corrosion-suppression agent
Copying machine, printer
various parts
• Various Parts
Film
Organic film
High formability and lubricity due to
surface film action
Inorganic film
Excellent conductivity and adhesion
because of thin film thickness
Required performance
• Importance on conductivity
• Importance on corrosion resistance
and scratch resistance
Audio equipment, etc
• Side Plate
Refrigerator, washing machine, etc
• Importance on conductivity, paintability
and ironing property
Weldability
Excellent
Excellent
Excellent
Fair
Excellent
×
Fair
Fair
Fair
Excellent
Degraded
ethanol-mixed
gasoline
ECOKOTETM-S (Sn-Zn coating)
Excellent
Excellent
ALSHEETTM (aluminum coating)
Excellent
Excellent
Fair
Fair
Excellent
20
• Example of Corrosion Resistance of Formed Section
QS1
QF1・T1N
QM
10
QS1
0
30
50
72
Test time (hr)
QM
QF1
T1N
20
QS1
QF1・T1N
QM
10
QS1
0
30
50
QM
QF1
T1N
T1N
72
Test time (hr)
Conductivity (Grounding Property)
Press
formability
Degraded
20%FAMEmixed gasoline
Fair
No inclusion of environment
burden substance
Growing concerns about
permeation and deterioration
Outer surface
corrosion
resistance
Degraded
gasoline
• Fuel tank
Resin
Inferior permeation shut-off
performance
High recyclability because of steel sheet
Fair
Processed/
injured section
• Example of Corrosion Resistance of Flat Surface Section
(A kind of typical surface treatments is shown)
TERNESHEET
(Pb-Sn coating)
ALSHEET
(Aluminum coating)
Outstandingly high
corrosion resistance
Corrosion Resistance Mechanism of Chromate-free
Coating Film : Chromate-free film uses substances selected
adhesiveness
Corrosionsuppression
function
Salt Spray Test: Flat Surface Section and Formed Section (Erichsen 7 mm Extruded Section)
No fuel permeation because of steel sheet
Lighter weight
ZINKOTE is a chromate-free electrogalvanized
sheet used for flat panel displays, copying
machines, printers and other devices and
equipment.
Characteristic Properties of Fuel Tank Material
Promotion of recycling
r#BSSJFSFffect
r4FMGrestoration function
When this film is injured, soluble hexavalent chromium leaches out
to offer a “self-restorative function” that repairs the film.
③ Coating
Special coating film
Regulation for new
fuel efficiency
Regulation for upper limit
for fuel permeation
Coating film
(containing corrosion-suppression agent)
Lighter weight
ECOKOTE -S
(Sn-Zn coating)
O2
Steel sheet
ECOKOTETM-S
TM
②
Bio fuel
Promotion of recycling
ZINKOTE: Used for high-performance
electric appliances and OA equipment
Function of Chromate Coating Film
Rust occurrence area rate
(%)
Regulation for
environmental burden
substance
Increasing use of
eco-friendly fuel
H2O
Shutting out
of crrosion
factors
Rust occurrence area rate
(%)
ELV regulations (Europe)
Coating structure
Corrosion Resistance Mechanism of Chromate-free Coating Film
Corrosion factor
Requirements of fuel tank
materials: total absence of
substances that add to
environmental burden,
resistance to new fuels, no
fuel permeation,
advantageous for recycling,
and light-weight design
Regulation for upper
limit for fuel permeation
TERNESHEET (Pb-Sn coating)
●
• Chromate-free Coating Film
Emerging environmental
needs facing fuel tank
materials
Regulation for environment
burden substance
Increasing use of ecofriendly fuel
Base metal
TM
Voluntary regulations
of Japan Automobile
Manufacturers
Association (Japan)
Zn
[Main Properties of ZINKOTE]
•Corrosion resistance •Lubricity •Conductivity •Spot weldability
•Thermal resistance •Alkaline resistance •Solvent resistance
•Fingerprint resistance •Paint adhesion
ZEV regulations (US)
Surface treatment
Paintability
t-PSFTUB1SPWF5ZQF
Good
Excellent
t$PODFQUPG$POUBDU3FTJTUBODF.FBTVSFNFOU%FWJDF
-PSFTUB1SPWF5ZQF
Measurement
device
Measurement
system
Measurement
range
Probe
Loresta EP type made
by Mitsubishi Chemical Corp.
4 contact/4 probe method,
constant current application system
Constant current source
TN
i
10 ∼10 Ω
ESP probe
（Pin tip 2 mmφ × 4 contacts, pin interval 5 mm
spring pressure 2.4 N/spring
Conducting cycle＊
Assessment Conducting rate（%）＝
× 100
20 cycles
-2
t&YBNQMFPG$POUBDU3FTJTUBODF5FTUT（-PSFTUB1SPWF5ZQF）
V
T1N
6
Test piece
QS1
10
20
30
40
50
60
70
80
90
100
Conducting rate (%)
＊Conducting=Les than 1mΩ
10
11
ZINKOTETM COLOR
DURZINKLITETM
Electrolytic zinc-nickel alloy-coated steel sheet and strip
• Excellent cost performance and reduced manufacturing term at user
plant by coating only one side of ZINKOTE with a beautiful topcoat
• Available colors (3): black, silver and white, and preparation of
improved scratch-resistant type
• Black coated sheets (2): both-sided black coated type, and highconductivity/good heat-absorption type
• Outstandingly high corrosion resistance even with conventional
electrolytic galvanizing mass
• Fine appearance and finishing after coating, similar to cold-rolled sheet
• Easy spot and seam welding
Topcoat
Zn (electrogalvanizing)
Base metal
Zn (electrogalvanizing)
Base metal
Conductive film
●
Coating structure
●
◆Product Lineup
Color
Coating structure
Type
Heat treatment symbol
Surface finish
Standard type
Excellent cost performance due to improved
topcoat performance; Preparation of two kinds of
surface roughness depending on appearance̶
general roughness and high roughness
KJ1
D (general)
D5 (high roughness)
Improved
scratch-resistant type
Improved scratch resistance due to
addition of large-diameter beads to film
KJ2
D
Standard type
Excellent cost performance due to improved
topcoat performance
SJ1
D
Improved
scratch-resistant type
Improved scratch resistance due to
addition of large-diameter beads to film
SJ2
D
White
Standard type
Excellent cost performance due
to improved topcoat performance
HJ1
D
Black
Standard
both-sided black type
Excellent cost performance due
to improved topcoat performance
K1K1
D (general)
D5 (high roughness)
Standard conductive,
heat-absorbing black type
Standard black film (KJ1 film) on one side, and
conductive heat-absorption black film on the other
K1KC
D (general)
D5 (high roughness)
Conductive, heat-absorbing
type with conductive clear film
Conductive clear film (QS film) on one side, and
conductive heat-absorption black film on the other
KJC
D (general)
D5 (high roughness)
Black
Zn-Ni alloy
Weldability
Bare Corrosion Resistance
In commonly conducted salt spray testing, the bare corrosion resistance of
DURZINKLITE coated surfaces is more than 3 times greater than galvanized
sheets with equal coatings. This product shows favorable corrosion
resistance even with a thin coating mass, but the provision of a special
chromate treatment further improves corrosion resistance.
• Example of Corrosion Resistance Assessment of DURZINKLITE
(Non-treated Sheet Salt Spray Test)
Individual spot or seam welding of DURZINKLITE can be conducted using
low welding current, and because the welding current range is wide, welding
is easy.
Examples of single spot welding at a range of welding currents for
both-side galvanized sheet are shown at right. In each case, adequate
nuggets are formed using a comparatively low welding current, and the
recommended range of welding currents is wide to allow easy welding.
Silver
• Example of Welding Current Range for Single Sport Welding of Bothside Galvanized Sheet
DURZINKLITE
5% red rust occurrence time (hours)
Conductive,
heat-absorbing
black
300
Shortage of
nugget diameter
DURGRIP
(galvanized)
200
Appropriate welding
current range
Electrode welding
dn=4√t
DURZINKLITE
(20g/m2)
ZINKOTE
(20g/m2)
100
DURGRIP(galvannealed)
(45g/m2)
• Home appliance
•AV equipment, electronic device
•OA equipment
•Housing equipment (interior, steel furniture)
12
ZINKOTE
Cold-rolled sheet
0
20
40
60
80
100
Type
Coating mass (g/m2)
6
7
8
9
Welding current (KA)
Reference: Time required for the occurrence of red rust in the salt spray test JIS Z 2371
13
ECOTRIOTM
SUPERNICKELTM
Zn-Si-Ni alloy coated steel sheet and strip
Nickel Coated Steel Sheet and strip
• Lead-free and chromate-free, and conforms to RoHS (Restriction of Hazardous Substances) Directive
• Greater suppression of whiskers compared to electrolytic tinplate
• Solderability and conductivity that are similar to electrolytic tinplate and higher than those
of galvanized steel sheet
• Availability of thin-gauge products with a minimum thickness of 0.15 mm
• NEW ECOTRIO even in thin coating mass specifications: Taking over the basic properties of ECOTRIO
• High-strength ECOTRIO: Cost-cutting substitute for nickel silver and stainless steel sheets
●
t5FTU3FTVMUGPS0DDVSSFODFPS/P0DDVSSFODFPG
8IJTLFSVOEFS)JHI5FNQFSBUVSFBOE)JHI)VNJEJUZ$POEJUJPO
[Test condition]
Test piece:
Plate thickness 0.3 mm,
cup forming
Environment:60˚C × 90%RH
Time:1000hrs
Observed maximum whisker length (μm)
200
160
120
80
40
0
ECOTRIO
3X/3X
ECOTRIO
8/8
Electrolytic tinplate
2.8g/m2
* The data shown here is an example
of test results, which therefore does
not mean any quality guarantee.
* In cases when the whisker resistance
under strict high-temperature conditions (for example, high temperature
and high humidity surpassing 60°C)
is required, the product with importance on whisker resistance can be
proposed. For details, please send
inquiries.
Zn-Sn-Ni alloy layer
Base metal
• High adhesion and corrosion resistance due to formation of Fe-Ni alloy layer
• Availability of material quality that conforms to the particular application and the degree of
fabrication
• Diverse surface finishes are available, from an outstandingly fine mirror finish to a rough dull finish.
• Availability of coatings from thin to heavy and of differential coatings on front and rear surfaces
• Same thermal resistance as that of stainless steel
Coating structure
•Game console
•Automobile AV equipment
•TV set
•Personal computer
•Electric and electronic parts
•Audio system
700
External appearances of the top and body parts of size C and AA
batteries made of SUPERNICKEL steel sheets and Ni-coated sheets
without alloy layer, after subjected to 60 minutes of salt spray tests are
shown below.
In both cases, batteries made of SUPERNICKEL steel sheet shows
better post-fabrication corrosion resistance.
600
•External appearances after SST (coating thickness: 2μm)
•Glossiness of surface finish
1000
BM finish
900
800
500
BE finish
Top
•Switch metal fitting
300
•Flow regulating valve
200
SUPERNICKEL
B finish
Fabricated
into
size C
batteries
100
1
2
3
4
5
Bad
After acceleration
Solder wetting time
(Zero crossing time) (sec)
6
4
2
※SST: Pursuant to JIS Z 2371
•Tuner cover
Coating Adhesion (workability)
Good
ECOTRIO
3X/3X
ECOTRIO
8/8
SUPERNICKEL
• Heat sink metal
fitting
100
Ratio of red rust
occurrence area (%)
Bad
t$PSSPTJPO3FTJTUBODF4BMU4QSBZ5FTU
Good
◎ (No peeling found) △ (Peeling found)
Erichsen test
◎ (No peeling found) ◎ (No peeling found)
Cupping test
◎ (No peeling found)
found)
△ (Peeling
Work follow
Bending test
○ (Virtually no cracks found) × (Many cracks found)
(SEM observation)
Erichsen test
○ (Virtually no cracks found)
× (Many cracks found)
Bending test
A cellophane tape on the coating is peeled after 0T bend. Test Methods
Erichsen test
adhesion
80
[Test condition]
Corrosion resistance:
(Salt spray test JIS Z2371)
Test piece:
Flat sheet with edge seal
8hrs
24hrs
48hrs
60
• Electrical equipment
metal fitting
• Electrical equipment
metal fitting
Comparative example:
Ni-coated sheet without alloy
layer (non-diffusion type)
Bending test
Coating
•Shield cover
2.8g/m2
Corrosion Resistance of As-coated Flat Sheet Without
Fabrication
•An example of evaluation of coating adhesion (workability)
(tape peeling)
0
Ni-coated sheet
without alloy
layer
Evaluation method
Glossiness:Measured in transverse direction at an incidence angle
of 60 degrees with Nihon Denshoku Model VGS-ID glossmeter.
•Condenser case
8
Body
400
t.FBTVSFNFOU3FTVMUTGPS4PMEFS8FUUJOH5JNF
Without acceleration
Coating structure
Post-fabrication Corrosion Resistance
Surface gloss
Solder Wettability (Solder Wetting Time)
10
Base metal
Coating thickness (μm)
[Test condition]
Test piece:
0.3mm×20mm×7mm
Kind of solder:
Sn-Ag-Cu
Solder melting temperature
Flux applied:
Rosin alcohol active type
accleleration conditions:
100°C (saturated humidity),
8 hrs
Ni layer
Fe-Ni alloy layer
●
Glossiness
Chromate-free Coating Film
Cupping test
A cellophane tape on the coating is peeled after a 7mmdeep cup is formed.
Cellophane tapes on the inside and outside are peeled after
a 30mm-deep cup is drawn.
SUPERNICKEL steel sheet shows better corrosion resistance than
Ni-coated steel sheet without alloy layer on both unfabricated and
fabricated parts due to ① reduced pinholes on the coating layer,
② formation of an Fe-Ni alloy layer having good adhesion, and ③
improved ductility due to recrystallization and softening of the Ni
coating layer.
Heat Resistance
SUPERNICKEL steel sheet has heat resistance comparable to
stainless steel (SUS) that is normally used as a heat-resistant material
(heating temperature ~300°C). As typical evaluation results of heat
resistance, changes in glossiness, changes in infrared-ray reflectance
and changes in color tone on heating are shown below.
40
•Binder
20
0
ECOTRIO
3X/3X
ECOTRIO
8/8
2.8g/m2
•Portable cooking stove
•Stove reflection plate
High in whisker resistance, solder wettability and corrosion resistance
14
•Battery
•Toaster
15
VIEWKOTETM
Self-Cleaning Type VIEWKOTE
❶ Hydrophilic coating vastly improves
Topcoat
• Smooth and fine painted surface
• Selection of colors and material properties that meet specific needs,
through the combined use of diverse paints and base substrates
• Improved such factors as process, space, energy and load savings at user plant
resistance against rain drop stains.
❷ Offers high workability thanks to
optimal substrate design.
❸ Also offers excellent weatherability
and stain resistance in processed
areas.
❹ A wide range of color variations,
including metallic tones.
❺ Chromate-free and eco-friendly.
Primary coating
Surface treatment
Base metal
Surface treatment
[Paint type of VIEWKOTE]
• TypeⅠ/ Highly workable type • Type Ⅱ / Balanced type in workability surface physical properties
• Type Ⅲ / Stain-resistance type • Type Ⅳ / Highly workable, stain-resistant type(universal type)
• Type Ⅴ / Highly corrosion-resistant type
Rear surface coating
●
Coating structure
Lighting
equipment
Flat-panel TV
Digital recorder
Auto on-board
equipment
Reflecting
board
Back panel
Chassis
Chassis
Outdoor exposure for
1.5 years at Kimitsu City,
Chiba, Japan (industrial
zone)
Hydrophilic coating
Water
Self-Cleaning Type
Coating
Stain
Primer coating
Chemical treatment
Galvanized steel sheet
The hydrophilic
coating allows drops
of water to penetrate
under stains
Chemical treatment
Back coating
The stains are
then washed
away
SelfCleaning
Type
Conventional
VIEWKOTE for
outdoor airconditioner
units
Deep Drawable Metallic VIEWKOTE
VIEWKOTE
recommended specifications
Front side
VIEWKOTE TypeⅠ
Back side
VIEWKOTE TypeⅠ
Front side
VIEWKOTE Type Ⅳ
Back side
Electroconductivity Type
Front side
VIEWKOTE Type Ⅳ
Back side
Electroconductivity type
Front side
VIEWKOTE Type Ⅳ
Back side
Heat Absorption Type
Application
Outdoor
air-conditioner unit
Refrigerator,
washing machine
Automobile parts
Application parts/
materials
VIEWKOTE
recommended specifications
❶ Offers attractive appearances.
❷ Suitable for processing applications
Front side VIEWKOTE Type Ⅳ
Top, outside
panel
Back side
that require bending or drawing.
VIEWKOTE Type Ⅱ
❸ Add functions by selecting the
Front side VIEWKOTE Type Ⅳ
Side panel
Back side
appropriate back coating.
Example: To discharge internal heat,
select high heat absorption
type coating.
❹ Chromate-free and eco-friendly.
Rear surface coating
Front side VIEWKOTE Type C
Oil filter
Back side
Lubrication Type
• Home appliance
•AV equipment, electronic device
•Fuel Cell
•Housing equipment (door, kitchen, bath)
❶ Prevents static electricity caused by
High Heat Absorption Type VIEWKOTE
discharges heat from devices/
equipment.
❷ Heat absorption coating inside the
device enclosure facilitates heat
absorption and discharge. The
broad VIEWKOTE menu allows
❸VIEWKOTE steel sheets are
chromate-free and eco-friendly.
Coating Structure(Example)
• Atmospheric thermometry result of the interior of the
Box (example)
80
ZINKOTE
Colored top coating
Primer coating
Chemical treatment
Chemical treatment
Heat Absorption
Coating
Drop about
70
Temperature (°C)
❶ Heat absorption type VIEWKOTE
Under these experimental conditions, steel
sheets with an endothermic film can reduce
the atmospheric temperature of the interior
of the Box by about 10˚C in comparison to
the bare specifications of ZINKOTE.
0
20
40
60
80
100
120
Measurement time (min)
High Reflection Type VIEWKOTE
•Measurement of diffuse reflection factor (example)
Improved to diffuse reflectivity of 10% or more.
High Reflection
Coating
Chemical treatment
EGC
0.55mm
Coating mass
20/20
Back coating
VIEWKOTE
E type
Chemical treatment
Galvanized steel sheets
Chemical treatment
Back coating
Top coating
Silver metallic
(VIEWKOTE
Type $ )
Antistatic Type
VIEWKOTE
Coating
Primer coating
Chemical treatment
Chemical treatment
Back coating
•Example: Comparison of charged voltage
0.3
0.2
0.1
82
0
Antistatic Type VIEWKOTE
Conventional VIEWKOTE
Experiment conditions：
Measurement of the charged voltage of the coating surface by non-contact type static
electricity measuring apparatus immediately after VIEWKOTE sample (70×150mm)
makes contact with a piece of neoprene resin (50×100mm) and is then detached.
Grainy VIEWKOTE
❶ By adding beads with large particle
diameters to the coating,this type of
VIEWKOTE features highly decorative designs,much better than those
of conventional prepainted steel
sheets.
❷ The decorative designs can be
improved further by combining
embossing and/or press forming.
❸ Chromate-free and eco-friendly.
•Example:Appearance after embossing 1mm
Grainy
VIEWKOTE
Coating
Primer coating
Chemical treatment
Chemical treatment
Back coating
Beige color
Brick colored
Orange-Peel-Surfaced VIEWKOTE
Reflection film
Primer coating
Primer coating
Zn standards
Indicated thickness
General white
PCM
High Reflection Type
VIEWKOTE
including corrosion and chemical
resistance.
❹ Both electromagnetic shielding and
temperature control can be achieved
by selecting heat absorption types
with good electroconductivity in the
back coating.
❺ Chromate-free and eco-friendly.
•Processing Examples of Deep Drawable Metallic Type
Deep Drawable
Metallic Type
Coating
Heat Absorption
50
❶ Diffuse reflectivity of 92-98%.
❷ Can be deep drawn.
❸ Has excellent basic properties
friction from conveyors and rubber
suction disks in the processing/
production process.
❷ Reduces dust adhesion caused by
static electricity.
❸ Reduces electric shocks caused by
static electricity.
10̊C
60
40
Antistatic Type VIEWKOTE
◆Premium Series
High Reflection
VIEWKOTE
(92% type)
Chemical treatment
Back coating
High Reflection
VIEWKOTE
(98% type)
80
82
84
86
88
90
92
94
96
98 100
Diffuse Reflectivity (Wavelength 555nm)
※ Can be designed with reflectivity of 92 or 98%,
depending on the application.
16
•How self-cleaning works
Charged voltage (kV)
Application
Application parts/
materials
❶ A pebbled surface like that of an orange
peel is achieved by special beads in the
coating. These beads then melt during
heating when the coating is enameled.
❷ This coating improves processing
yield by making handling scratches
less visible.
❸ Its workability, chemical resistance,
and other basic properties are the
same as conventional VIEWKOTE.
(Can also include antistatic property.)
•Example:Orange-Peel-Surfaced VIEWKOTE
Orange-PeelSurfaced
VIEWKOTE
Coating
Primer coating
Chemical treatment
Chemical treatment
Back coating
17

Coated Steel Sheets

Transcription

Similar documents

ibostar plus. - Daetwyler USA

Case Study Electrical: Lighting Trilux

SermeTel 6F-1 Coating System - Praxair Surface Technologies

Article: Heavy-metal free pretreatment

TEA STAINED STAINLESS STEEL?

Quality Metal Finishing - Powder Coating Technologies

Maimi Dade Portable Roll Formers

Thomas AC Series - Thomas Engineering Inc

Read more... - GSB International