The DB 44/T 438-2007 standard specifies the technical requirements and test methods for automotive aluminum alloy wheel film. The standard is applicable to the performance evaluation of automotive aluminum alloy wheel surface coatings, involving the requirements of corrosion resistance, abrasion resistance, adhesion and weathering resistance of the film. The standard describes in detail the technical specifications, test methods and quality control measures of the film to ensure that the coating can maintain a stable Appearance and functionality under harsh environment conditions. By implementing this standard, the coating mass of aluminum alloy wheels can be effectively improved, its service life can be extended, and the standardization and standardization of coating technology in the automotive industry can be promoted.