Posted by Gordon England on July 25, 2003 at 12:21:42:
In Reply to: Effects on the substrate due to a remove of HVOF tungsten carbide coating posted by N. Champin on July 25, 2003 at 09:32:49:
: Dear all,
: I used the electrolytic method to remove a tungsten carbide coating (WC83-Co17), the substrate is a 42CD4 or a 30CD4, we have done in the first time a shot-peening on the substrate before the sand-blasting, then our coating was to slim, so we remove this one by the electrolytic process.
: I'd like to know if we had change the characteristics of the substrate by this process, and if our new tungsten carbide coating will have the same characteristics than the old one.
: Thank you for your answers.
: Best regards,
: N. Champin
If you grit blast the surface again lightly just before spraying there should be no problem. If hydrogen embritlement of the substrate from the electrolytic stripping is a concern, just give it the recommended low temperature heat treatment prior to grit blasting.
Regards Gordon
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