Mainly used for pre-treatment of metal surfaces to improve the surface quality and anti-corrosion performance of metal materials.

The pickling and phosphating line belongs to the metal pretreatment process,which is mostly used for carbon steel and iron parts.The workpiece is first pickled to remove oxide scale and rust, and then phosphorized to form a layer of phosphate conversion film on the metal surface,which is mainly used as a base for subsequent painting,powder coating and electrophoresis or e coating to enhance the adhesion and corrosion resistance of the coating.

Removing oxides and rust:acid washing part can remove oxides and dirt from the metal surface through an acidic solution,making the metal surface clean.

Surface pretreatment:after acid washing,the metal surface is more likely to react with phosphating agents,forming a uniform phosphating film and improving the phosphating effect.

Phosphating treatment:the phosphating part will form a uniform and dense phosphating film on the metal surface,improving the anti-corrosion and wear resistance of the metal material.

Improving coating adhesion:the metal surface treated with acid washing and phosphating has a moderate roughness, which is conducive to the adhesion of the coating and improves its corrosion resistance.