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What is the type of treatment recommended for electro-galvanizing surface before powder coating?

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We have electro-galvanized components to be powder coated. What is the proper treatment that we have to apply? And under what conditions?

Please advice

Regards

Siva Ram
Production Manager

Siva Ram
- Free Zone, Sharjah, U.A.E.

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The term "electro-galvanized" is one that can mean several different coating system. Assuming that maybe yuo mean electroplated zinc, then either a phosphate or chromate conversion coating would be appropriate traditional systems. Increasingly though manganese or silane based systems are proving popular and deliver the adhesion required.

Geoff Crowley
galvanizing &
powder coating shop
Glasgow, Scotland

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Zinc phosphate is the best but there are many others. My employer has four that we use on a ongoing basis depending on customer requirements. Our cadillac is zinc phosphate, also a chrome based one is used, a non chrome one and a cobalt complex which is the most popular.

Ron Zeeman
Coil Coating - Brampton, ON, Canada

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I have a good result with zirconium phospate, which is easy to use and it does not produce waste.

Robert Baker
- Poland

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