Alternatives to hex chromate for mechanical tin / zink plating
Alternatives to hex chromate for mechanical tin / zink plating
(OP)
Could anyone suggest an alternative topcoat for a mechanical tin / zink plating? Most of the suppliers I have contacted about trivalent chromate have said they aren't recommending them for tin / zinc mixtures.





RE: Alternatives to hex chromate for mechanical tin / zink plating
RE: Alternatives to hex chromate for mechanical tin / zink plating
RE: Alternatives to hex chromate for mechanical tin / zink plating
RE: Alternatives to hex chromate for mechanical tin / zink plating
Thank you for the reply. I do understand there are other options with electroplating. I was specifically wondering about mechanically plated parts.
The application I was thinking about was mechanically plated flat springs of extremely high tensile steel. They are not electroplated because of hydrogen embitterment / baking issues.
Cost is a bit of a factor, so exotic processes like solvent based aluminum plating are not viable.
RE: Alternatives to hex chromate for mechanical tin / zink plating