Scratch Tester (Macro)

The macro scratch tester is a versatile instrument extensively used to evaluate the adhesive strength of thin films or coatings deposited on various substrate materials. It measures both interface adhesion (between the substrate and coating) and cohesive strength (within the coating itself), providing critical insights into coating reliability. In addition to adhesion testing, the macro scratch tester is employed to assess surface mechanical properties such as fracture resistance and deformation behavior under controlled loading conditions. By applying a progressive or constant load through a diamond-tipped indenter, the system detects failure points using acoustic emission signals or changes in friction coefficient, enabling precise determination of critical loads for adhesion or cohesive failure. This makes the macro scratch tester an essential tool for industries like aerospace, automotive, and electronics, where coatings must meet stringent performance requirements for wear resistance, corrosion protection, and thermal stability.