After the surface treatment process of the elbows and Stainless Steel Weld Tee of stainless steel pipe fittings is completed, pickling and passivation treatment is required. Pickling can remove the oxide layer on the surface of the workpiece, and passivation is to form a new chromium-rich protective layer on the surface of the workpiece. If it is not treated after pickling, it is often easier to rust. Passivation can greatly improve the anti-oxidation ability. Although both pickling and passivation use acid, there are still differences. The pickling and passivation process is an engineering project with relatively high technical content. The quality of pickling and passivation directly affects future production needs.

Formula of pickling liquid, passivation liquid and pickling paste

Pickling liquid: 20% nitric acid + 5% hydrofluoric acid + 75% water

Passivation liquid: 5% nitric acid + 2% potassium dichromate + 93% water

Strong advantages of stainless steel pickling and passivation liquid products:

1. Pickling and passivation functions are two-in-one, removing dirt, rust, and welding spots, and protecting at the same time.

2. Low cost, reusable liquid medicine, high efficiency, and the best alternative to mechanical grinding or rust removal.

3. Does not affect the conductivity of the material, does not change the material composition, and does not affect the bonding properties of spraying.