Powder coating, painting or other industrial coatings often require a specific surface roughness for adhesion to the workpiece. The level of roughness can be designated as a mil profile, Ra, or occasionally as Rz. If the anchor pattern is not rough enough, the coating may not adhere properly and could fail prematurely. If the anchor pattern is too deep, or more rough than required, excessive coating material is required to cover the rough surface.
Anchor pattern or etch pattern creation is accomplished in a blasting process with a sharp media. The best media types to use would be angular media such as aluminum oxide, silicon carbide, white aluminum oxide, steel grit, or stainless steel grit.
Contact Abrasive Products today for assistance with developing a process that produces the anchor pattern requirements recommended for your coatings.