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Chromium plating thickness for 480 hrs of salt spray test

I want to do a chromium plating which is a part of my project . The plating should hold for 480 hours of salt spray test.

Please recommend me a thickness for chromium plating along with the grade or material properties. Awaiting for the earliest reply.

Paul rajesh
plating shop - Chennai, Tamil Nadu, India
2004

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Hello Paul. Hard chromium is porous and not particularly corrosion resistant; I don't think this is very practical. But please post additional detail, and someone can probably help you. I think that some shops doing motorcycle components are nickel plating or electroless nickel plating before their hard chrome to get good salt spray hours.

Please remember, though, that salt spray testing is an accelerated test for quality assurance purposes to make sure your process has not gotten out of control. It is not a proper design parameter because accelerated corrosion mechanisms are completely different from natural corrosion mechanisms. If we designed to salt spray tests, we'd assume galvanizing was a rather poor method of corrosion proofing, whereas 75-100+ year survivals prove that for many environments galvanizing is probably the very best corrosion-proofing method :-)

Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004