Project Introduction

Scratch testing is a standard method commonly used to evaluate the adhesion strength between the surface coating and the substrate material. A sharp tip made from a material harder than the coating is used to scratch the surface of the sample or workpiece. The load on the scratch tip is increased until the coating and substrate separate, at which point the load is the critical load. This allows for the calculation of the adhesion strength between the surface coating and the substrate.

Application Scope

The Scratch Test is primarily used to assess the materials' resistance to shearing, scratching, scoring, scraping, and engraving, including anodized materials, rigid organic materials, powder coatings, soft metals, plastics, glass, and adhesive coatings.

Method Standards

GB/T17657-1999, ISO4586-2, JISK6902, Federal series standards, Terrazzo 90322-9E-1, UNI 9428 Furniture, AS/NZS AS2924.2, ASTM C217, CEN series standards, DIN 53799, DIN 68861-4