Jun 10, 2016 0 comment

“I am after a technical explanation with regards to powder coating galvanized sheet steel. What I require is a technical explanation on the adhesion process. We are to submit this explanation to an engineer in the middle east to assist us in winning a contract.”


“Powder coating will adhere to paintable grades of galvanized steel. These grades are known by their proprietary names such as “galvannealed steel”, or “paint grip steel”. Hot dipped galvanized steel will not provide a surface that is able to be powder coated. The powder will adhere to the galvanized steel but often the galvanized coating will fail from the steel substrate. Zinc phosphate is the normal pretreatment used in conjunction with powder coating galvannealed steels.”

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