The main purpose of this product is to remove oil, rust and phosphating from the surface of steel. Because iron and steel products often come into contact with the atmosphere, due to the effects of oxygen and water in the atmosphere and the SO2, CO2, H2S that may be contained, it is easy to cause corrosion, resulting in product performance degradation or even damage. Therefore, it is necessary to eliminate the disadvantages of the quality of the layer in the pre-painting treatment to improve the protective performance of the coating, which is very important for steel products.