■ Measure peak-to-valley height of blast cleaned surface.
If the profile is too low, the adhesion of the coating to the surface will be reduced.
If the profile is too high, there is the danger that the profile peaks will remain
non-coating, maybe rust spots happen. ■ Meet ASTM D 4417-B ■ Zero set block is included, set zero before measurement ■ Stainless steel base
