SermeTel 6F-1 Coating System - Praxair Surface Technologies



SermeTel 6F-1 Coating System - Praxair Surface Technologies
SermeTel Process 6F-1 Coating System
The SermeTel® Process 6F-1
coating system is a multi-layer
inorganic overlay. The basecoat
consists of a dense aluminum-filled
galvanically sacrificial coating. The
topcoat is a chromate/phosphate
chemically inert sealant. The
sealant retards corrodants from
penetrating to the base metal, thus
significantly extending the useful
life of the coating system in the
harsh environments found in gas
and steam turbines and in industrial
processing equipment.
SermeTel Process 6F-1 was
developed to provide extended
corrosion protection and antifouling protection for industrial
and electric utility gas turbine
compressor rotors.
When used in gas turbine engines,
SermeTel Process 6F-1 has yielded
cost savings from extended
component life and reduced
maintenance costs.
Although the recommended
thickness of SermeTel 6F-1 is 2.0
to 4.0 mils, the coating system can
be applied in precise thicknesses
ranging from 0.5 mils and up.
SermeTel 6F-1 provides protection
against cyclical erosion and
corrosion. It also can restore the
surface finish of corroded/eroded
Praxair Surface Technologies, Inc.
1500 Polco Street
Indianapolis, IN 46222
[email protected]
+1 317 240 2500
+1 317 240 2255
The coating system can be used on
components such steel compressor
blades, vanes, disks, hubs, shafts,
cases, and bearing supports for its
added erosion characteristics.
Extensive OEM testing of SermeTel
coatings has shown no fatigue
impact on coated parts.
Physical Properties
Thickness 0.5 mils (12.5 µm) to 2.0 mils (50 microns) or more as required
Surface Profile (Ra) (Typical)
≤ avg. 35 µinches at .030"cutoff
(.89 micron @ .8 mm)
Maximum Continuous
Operating Temperature
1050°F (565°C) (on non-rotating
Peak Operating Temperature/Time
1100°F (593°C)/1 hour
pH Operating Range
3.5 to 8.5 (up to 11.0 in amines)
Performance Data (2 mil coating (50 µm) on 1010 steel)
Test Salt Spray (ASTM B117)
No red rust after 2500 hours.
Abrasion Resistance (ASTM D968)
> 300 liters/mil
Tensile Bond Strength (ASTM C633)
(measured on basecoat alone)
≥ 8,000 psi (70 MPa) strain rate:
0.1 inch per minute
Dresser Rand Specification 015-009-029
© Copyright 2010 Praxair S.T. Technology, Inc.
All rights reserved
Printed in the United States of America
Praxair, the Flowing Airstream design, and
SermeTel are trademarks of Praxair S.T.
Technology, Inc. in the United States and/or other
Printed on recycled paper
The information contained herein is offered for
use by technically qualified personnel at their
discretion and risk without warranty of any kind.

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