Most painting and coating systems specify a surface roughness to ensure proper bonding of the coating to the work surface. This is commonly referred to as an "anchor pattern". If the surface is not rough enough, the coating may not adhere properly and will fail. If the surface is too rough, achieving complete coverage of the surface may be difficult, or may require an excessive amount of the coating material.
Surface Preparation can help you match the right equipment to the right abrasive to achieve your anchor pattern needs. Contact us today.
Anchor Pattern Profile
The anchor pattern or etch profile on a surface created during abrasive blasting is critical to the subsequent application of a coating such as paint. The anchor pattern is basically the peaks and valleys on the surface of the metal (or any surface) on a microscopic scale. Often coatings manufacturers will specify the profile for optimal adhesion of the coating being used.
The profile is expressed in millimeters, microns or mils. Anchor patterns generally range from 3 mils and lower and is measured by the depth of the 'valley'.
1 mil = 0.001"
39 mils = 1 millimeter
25 microns = 1 mil