The JIS K5600-7-9-2006 standard specifies the durability test method of Coating films under Cyclic Corrosion conditions, which is suitable for evaluating the corrosion resistance of films in saline water spraying, drying and wet environments. The standard details the test equipment, test conditions, sample preparation and evaluation methods, and provides a comprehensive evaluation basis for the long-term durability and protective performance of films by simulating the alternating effects of multiple environments. This method is suitable for Coating development, quality control and anti-corrosion performance testing in application scenarios. It helps to guide Coating selection and process optimization, and provides technical support for product durability and Reliability.