ISO 7253-1996 "Determination of resistance to neutral salt spray of Paints and varnishes" is an international standard for the determination of corrosion resistance of Coatings and varnishes in a neutral salt spray environment. This standard applies to Coatings, varnishes and related products and aims to evaluate their corrosion resistance under neutral salt spray conditions. The standard describes in detail the principle of the test, test conditions and operating procedures, including the preparation, coating, exposure and evaluation process of the test plate. Tests conducted through this standard can help manufacturers evaluate the performance of their products in similar harsh environments and provide a basis for quality control of Coatings systems.