Will Manganese Phosphating adhere to Zamak or Zinc pieces?

? Hi Dwayne. I'm not sure whether the deposition reaction will proceed properly because I've never heard of it being done. Manganese phosphate is generally for the purpose of "break-in" and oil retention, which would mostly apply to hardened steel components rather than zinc diecastings. So I think a better question might possibly be "what is a better approach for my application" rather than "can I get by with manganese phosphating".

Is this for lubricated parts, or are you intending to paint the parts, or is it for corrosion prevention? If lubricated, you could try it; if painted, you'd probably be better off with zinc phosphating which is sometimes done on zinc or zinc coated parts; for corrosion resistance, chromating would probably be better than phosphating, whether painted or not -- with the ideal being zinc plating followed by chromating followed by painting.

What exactly is the application? Thanks.

Regards,

Ted Mooney, P.E. RET