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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-resistant primer should
be applied (one coat is usually sufficient). New or
previously painted galvanized metal that is completely
rust-free can be painted with a top quality acrylic latex
paint without applying a primer; however, a metal primer
should always be applied to unpainted galvanized metal
before applying an oil-based or vinyl latex top coat. |
