GB/T 38933-2020 Cold rolled steel sheet for automobile—Test method of phosphate conversion coatings

GB/T 1771-1991 Paints and varnishes—Determination of resistance to neutral salt spray GB/T 1771-2007 Paints and varnishes—Determination of resistance to neutral salt spray(fog) GB/T 2361-1992 Rust preventing oils and greases—Test method of wet heat GB/T 9286-1998 Paints and varnishes—Cross cut test for films GB/T 9286-2021 Paints and varnishes—Cross-cut test GB/T 9792-2003 Conversion coatings on metallic materials—Determination of coating mass per unit area—Gravimetric methods GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2012 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 20854-2007 Corrosion of metals and alloys—Accelerated testing involving cyclic exposure to salt mist,“dry”and“wet”condition GB/T 1765-1979 Method of producing of paint films for testing heat and humidity resistance，salt-fog resistance and accelerated weathering GB/T 20854-2025 Corrosion of metals and alloys—Accelerated testing involving cyclic exposure to salt mist,“dry” and “wet” conditions