ASTM B809-95 (2018) "Standard Test Method for Wet Sulfur Vapor (" Sulphur Flower ") metallic coating porosity" is designed to measure porosity in metallic coatings and evaluate the coating's ability to protect the environment. These test methods are applicable to a variety of metallic coatings, such as gold, nickel, tin, etc., and can reveal whether the coating is effective in preventing sulfide infiltration, and are critical for evaluating coating performance under intended use conditions. This standard method is an important tool for quality control and deposition process control. Through standardized experimental operations and porosity measurements, the conformity and Reliability of coatings in various environments are ensured.