Re: source for Type I (silver) cad-plated fasteners
Posted: Sun Mar 11, 2012 7:46 pm
'The gold color is a result of a supplementary chromate coating for the Type 2 cadmium plating process in order to increase resistance to corrosion. Refer to ASTM specification B766 for Types 1,2 and 3 cadmium plating. Type 2 plating is an upgrade of the Type 1 bare cadmium which turns a chalky white color over time and exposure.
Chemical removal of the chromate coating with lye defeats the purpose of the upgraded Type 2 cadmium plating process.
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Chemical removal of the chromate coating with lye defeats the purpose of the upgraded Type 2 cadmium plating process.
[Non-text portions of this message have been removed]'