Chemical Make-up Standard?

[gski]

My company uses several different suppliers for galvaneal material. We are seeing inconsistances in the coatings. We did a chemical analysis of each supplier's material and found differences not only in the percentages of each element (which we expected), but also in the elements found. Some had a significant amount of tin, where others had no tin what so ever.
My question is: "Is there a recognized standard for the chemical make up of a galvaneal coating?"
Thank you.

 

[MHWood]

Hopefully other contributors will have a more detailed answer, but ASTM A653 only requires that the makeup be 99% zinc minimum. There is no mention of what the 1% can or should be.

Mike

 

[gski]

Thanks for the response and the info, Mike.

It's appreciated