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Testing method

Dear Sir/Madam,
Please let us have testing method for galvanising (zinc coating) or electroplating after product has been produced?

Ghasem ghasemi
Haier Iran - Isfahan
2006

There are numerous test methods, depending on the plating that you are applying, the substrate, and what concerns you. There are corrosion tests, adhesion tests, and many more.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
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I am plant supervisor and I am not familiar with testing protocol for zinc plating please list specifics on where I can go and acquire same. Thank you!

Roy Bentley
insulated component structures of florida - Eustis, Florida, USA
2006

Hello, Roy. I'm not trying to run you in circles, but the thing is: it's the designer who has to specify what he wants and what's important to him. You have to decide on required corrosion resistance, required minimum thickness, whether you want clear or yellow chromate from an appearance standpoint, etc. It might be good to start with a copy of ASTM B633; this in turn will reference test specifications and will give you a starting point.

Zinc plating almost always requires and receives a chromate conversion coating, and traditionally this involved hexavalent chromium, which is now forbidden by European WEEE and RoHS standards. So you'll also need to decide whether the item needs to pass these standards. I think you should plan that way regardless, which will essentially mean that you'll need to specify that the chromating process must be trivalent, and the parts must comply with WEEE and RoHS standards. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.

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