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Need for cadmium plating of CRES in seawater
Our existing requirement calls for cadmium-plated CRES screws to attach a 304SS part to a carbon steel foundation. In this application the assembly will be sometimes submerged in seawater and sometimes above-water. I am trying to evaluate the need for the cadmium plate, as it adds considerable cost, paid with tax dollars. Thank you for your assistance.
Gene H [last name deleted for privacy by Editor]
- Keyport, Washington
1999
Hello, Gene. Cadmium is a bio-accumulative toxin, and screws should not be cadmium plated if there is a reasonable alternative.
Perhaps the screws can be a higher grade of stainless, or galvanized, although neither is likely to reduce the cost.
Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
February 28, 2009
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