The standard "EN ISO 10308-2006 Review of porosity tests for metallic coatings" provides detailed guidance and commentary on porosity tests for metallic coatings. The main purpose of this standard is to describe the different methods used to determine the porosity of metallic coatings and their applicability. Porosity is an important indicator for evaluating coating mass, corrosion resistance and sealing performance. Through discussion of different test methods, this standard helps engineers and technicians to choose the appropriate test scheme to ensure the reliability and performance of metallic coatings in practical applications. The standard is applicable to various metal coatings, especially for the detection of coating porosity on metal substrates.