HG/T 2-784-1979 "Electrophoresis film preparatory method for aluminum and its alloy substrates" was issued by the Ministry of Chemical Industry of the People's Republic of China and proposed by the Petrochemicals Bureau of Shaanxi Province. The standard specifies the method of preparing Electrophoresis film on aluminum and its alloy substrates. The constant voltage deposition and lacquer method is used to deposit the lacquer on the surface of the test plate and film formation for subsequent inspection performance. The equipment required in the experiment includes the test plate, cathode plate, Electrophoresis tank, electrode rod, dilute water, thermometer, stopwatch and blast thermostatic drying oven.