Could it be rust? Need help in identifying the type of corrosion.
Could it be rust? Need help in identifying the type of corrosion.
(OP)
Hi,
Please see picture attached. The picture shows the gate material (Stainless Steel AISI 410) coated with Tungsten Carbide.
By right, we should not expect any corrosion or rust taking place. We try to touch the "rusting" part on the surface, but it was still smooth.
Any comments?
Thanks,
Jeffrey
Please see picture attached. The picture shows the gate material (Stainless Steel AISI 410) coated with Tungsten Carbide.
By right, we should not expect any corrosion or rust taking place. We try to touch the "rusting" part on the surface, but it was still smooth.
Any comments?
Thanks,
Jeffrey





RE: Could it be rust? Need help in identifying the type of corrosion.
But why wouldn't you expect 410 to rust? It is barely stainless unless in a very clean environment.
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P.E. Metallurgy, Plymouth Tube
RE: Could it be rust? Need help in identifying the type of corrosion.
My understanding of SS is that it has a layer of oxide to protect from corrosion.
On the other hand, it is coated with Tungsten carbide. Therefore, the chances of it to rust is slim.
Could it be due to the grease that is pressurized and resulted in the stain there? Note that the surface (brown area) is still smooth.
Thanks,
Jeffrey
RE: Could it be rust? Need help in identifying the type of corrosion.
RE: Could it be rust? Need help in identifying the type of corrosion.
Is the WC pure WC or does it have a binder (Co or Fe)? How was it applied (how porous is it)?
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P.E. Metallurgy, Plymouth Tube
RE: Could it be rust? Need help in identifying the type of corrosion.
Thanks. Information as follows:
Composition of the coating:
WC - 86%
Co - 10%
Cr - 4%
Applied through HVOF, Porosity to be maintained at 1%.
Hi Compositepro,
Thanks. Same thought here too. =)
RE: Could it be rust? Need help in identifying the type of corrosion.
RE: Could it be rust? Need help in identifying the type of corrosion.
RE: Could it be rust? Need help in identifying the type of corrosion.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Could it be rust? Need help in identifying the type of corrosion.