Scratch test is a routine inspection item for the surface quality control of automotive interior and exterior trims . It mainly checks the changes that occur when the surface of various automotive interior and exterior trims is scratched by hard objects (keys, coins, etc.) and other environmental stresses . Pan Rongrong and Zhang Zhiyong's paper "Common Scratch Test Methods and Applications of Automotive Interior and Exterior Trim Parts" expounded the principle of the scratch test, and from the test sample preparation, test conditions (scratch head, load, speed, scratch distance), result evaluation (visual evaluation method, instrument evaluation method) to summarize and analyze the technical points of the scratch test.
In addition, the scratch test methods and their applications commonly used by major automobile companies, including five-finger scratch test, grid scratch test, hardness test pen scratch method, and Taber friction Tester scratch test, are introduced . , coating scratch Hardness Tester scratch method, paper clip scratch method, etc., and analyzed the development trend of scratch test methods.
