Pickling Passivated Seamless Steel Pipe Supplier-GNEE
Use
Comprehensive pickling and passivation of seamless steel pipes and stainless steel to remove all types of oil, rust, oxide scale, weld spots and other dirt. After treatment, the surface becomes uniform silver-white, which greatly improves the corrosion resistance of stainless steel and is suitable for various types of stainless steel parts. , plates and their equipment.
Features
It is simple to operate, easy to use, economical and practical. It also adds high-efficiency corrosion inhibitors and fog suppressors to prevent excessive corrosion and hydrogen embrittlement of metals and inhibit the generation of acid mist. It is especially suitable for small and complex workpieces and is not suitable for paste application. It is better than similar products on the market.
Pickling seamless steel pipe process flow: degreasing---water washing---pickling--water washing---sealing agent
- There are generally two pickling methods for seamless steel pipes (carbon steel), as follows:
1. Sulfuric acid: dilute to a concentration of about 20%, heat to 60-65 degrees, and generally wash for 20-30 minutes;
2. Hydrochloric acid: also dilute to a concentration of about 20%, and pickle directly at room temperature, usually for 20-30 minutes;
Pickled steel pipes need to be rust-proofed, and passivation is one of them. It depends on the quality of passivation, and the selection of sealing agent is also very important.
- After pickling (subject to removal of oxide scale), rinse with water immediately, neutralize immediately, and passivate for rust prevention.
- Scope of application of pickling seamless steel pipe
Suitable for degreasing, rust removing and phosphating treatment of steel parts of various shapes and materials. It can be matched with electrostatic spraying, baking paint, powder spraying, painting and other coating processes.
The main features of pickled seamless steel pipes: solid packaging, convenient storage and transportation, the entire process of oil removal, rust removal, phosphating and passivation can be completed in the same tank, the process is simple, easy to operate, no heating is required, energy saving, stability Good, continuous use, no need for frequent discharge, very little pollution, no harmful substances such as NaNO2, NaNO3, NaF and Cr6+, the phosphating film is dense, continuous and uniform, all indicators meet the national standard, and the comprehensive cost of treatment is low.
