In the corrosion testing of various coatings, it's crucial to create precise scribe marks on the coating surface. Manual cutting often results in defects like non-straight scribe marks, damaged edges, and inconsistent damage to the substrate. These defects can introduce random variables into test results.
Moreover, cutting scribe marks on multilayer coatings manually becomes increasingly challenging, consuming more time and yielding uneven marks. ASTM D1654 details the method for evaluation of corrosion performance of painted or coated specimens subject to the salt spray environment dictated in ASTM B117. Painted specimens are typically scribed through the paint film to expose the basis metal.
