The ISO 7253-1996 standard specifies a test method for assessing the corrosion performance of Paints and varnishes under neutral salt spray conditions. The standard is designed to simulate corrosion in a real environment to evaluate the performance of coatings in long-term exposure to salt fog environments. The testing process involves exposing the specimen to a laboratory of salt fog atomization at constant temperature and Humidity conditions, and then evaluating the corrosion status of the specimen surface after a certain period. This evaluation helps manufacturers and users understand the service life and performance Stability of coatings in marine and salt environments, thus guiding material selection and application decisions.