The tests results the structure of the inner surface of the sampling

The tests results the structure of the inner surface of the sampling cylinder,
depending on the method of preparing surface of the sampler
1. The sample with the surface mechanically treated
Magnification 150 x
Magnification 500 x
Magnification 1000 x
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2. The sample of the surface mechanically polished
Magnification 150 x
Magnification 500 x
Magnification 1000 x
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3. The sample of the electropolished surface
Magnification 150 x
Magnification 500 x
Magnification 1000 x
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4. The sample of the etched and electropolished surface
Magnification 150 x
Magnification 500 x
Magnification 1000 x
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Description of the test run:
The study was cut out pieces of the cylindrical part of the samplers to collect LPG samples.
Prepared samples were observed under a microscope to assess the porosity and surface
roughness, depending on the preparation method.
The material was observed in 3 different magnifications as illustrated by photos.
Conclusions:
Roughness and porosity of the material depends on the surface treatment. As for potential
use in contact with the gaseous products the best properties show material samples 3 and 4.
The etched and electroplished surface has the best properties in contact with LPG form all
tested samples. By the purity and coherence of the material, this treatment gives the best
erosion protection of the performance related with corrosive effects of gases. It can be
provided, that such use reduces the risk of deposition of sulfur compounds, which during
collection and storage samples can make the reverse reactions. Finishing electrochemical
processes cause smoothing of the material, closing the pores and remove material impurities
form the surface. This is particularly important for measuring and analytical processes of
gases, where the impurities deposition and reverse reactions derived therefrom, are a
common cause of analytical errors with proper assessment of the sample quality in relation to
the lot from which it is derived.
All text, images and all other information published on these pages are subject to copyright. Any copying, distribution, electronic processing
and transmission of the contents without permission of Wallter Sp. o.o. is prohibited.
All rights reserved: Wallter Sp. o.o.