Steel structure anticorrosive paint is also called workshop primer. It is used for temporary protection of metal substrate after sandblasting, phosphating and other preliminary treatments and before spraying of antirust primer during workshop processing. The general protection period is 3 months. About, the longest is not more than half a year. The annual spraying control is low, the film thickness is controlled below 20um, and the welding burn width is required to be ≤15mm, which does not affect the normal operation of cutting, welding and other processes.