The GB/T 13452.4-2008 standard specifies the method of wire corrosion resistance test for Paints and varnishes on steel surfaces. This test is used to evaluate the anti-wire corrosion performance of films in a simulated environment to ensure that the coating can effectively resist corrosion in actual use. The standard describes the test conditions, procedures and evaluation methods in detail, including how to prepare the specimen, apply the corrosion environment and how to observe and record the corrosion. Through the test of this standard, the corrosion resistance of films in different environments can be evaluated to ensure the long-term Stability and protection effect of coatings.