Adhesion over Powder Coated Surfaces
Is there a way to improve adhesion of two-component polyurethane adhesives to polyester- and epoxy-based powder-coated surfaces?
Q. Is there a way to improve adhesion of two-component polyurethane adhesives to polyester- and epoxy-based powder-coated surfaces? K.P.
A. It is possible to apply an adhesive over a powder. The challenge is to find an adhesive/powder combination that works. You need to select a powder that meets the performance and appearance properties you need, and then work with an adhesive supplier to find the correct adhesive. Polyester powder is more likely to provide adhesion than epoxy powder. You can roughen the surface where you need the adhesion, but that may not be feasible. Talk to an adhesive supplier and you should be able to make it work.
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Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.