Poor Galvanized Metal Adhesion

Poor Galvanized Metal
Adhesion

Paint that has lost its adhesion to a galvanized metal
substrate.

Possible Causes
Improper surface preparation, such as inadequate rust
removal.
Failure to apply a primer before application of an oil-based or vinyl latex paint.
Failure to sand baked-on enamel finishes or glossy surfaces before painting.

Solution
Any rust on the metal should be removed with a wire brush; then, an acrylic latex
corrosion-inhibitive primer should be applied (one coat is usually sufficient). Previously
painted galvanized metal that is completely rust-free can be painted without applying a
primer. A latex metal primer should be applied to unpainted galvanized metal, followed by a
top quality exterior acrylic latex paint.