Rust removal methods and techniques for carbon steel tees

Rust removal methods and techniques for carbon steel tees

Carbon steel tees mainly use steel wire brushes and other tools to polish the surface of steel pipes, which can remove loose or raised oxide skin, rust, welding slag, etc. Manual rust removal can reach Sa2 level, while power rust removal can reach Sa3 level. If the surface of the steel pipe is firmly adhered with oxide iron, the rust removal effect of the east and west is not ideal, and it cannot meet the anchor pattern scale required for anti-corrosion construction.

Introduction to rust removal methods and techniques for carbon steel tees: Cathodic treatment is carried out in a 5% -10% (wt) solution containing 1g/L potassium iodide. Voltage: 6V, time: 30s, temperature: room temperature, cathodic current electrolysis. A brown black film layer is formed on the surface of the carbon steel three-way meter, which is thoroughly rinsed to remove oil stains and debris. The steel pipe products with the brown film are placed in the chrome plating tank for chrome plating, which can obtain a decorative chromium or hard chromium coating with excellent adhesion. The brown film dissolves at a suitable speed during chrome plating, without significant contamination, and the original appearance does not deteriorate.

Due to the diverse composition and shapes of carbon steel tees, as well as the varying conditions before plating, appropriate process flow and specifications, as well as special fixtures, should be adopted according to the actual situation.

When threading carbon steel three-way fittings, the selection of tapping oil is also quite important. Tapping oil needs to have outstanding cooling, smoothing, and rust prevention functions. If the smoothing effect of the tapping oil is not good, the smoothness of the tapped thread is poor, and the tap tapping resistance is high. If the cooling effect of the tapping oil is not good, the tap is prone to sticking teeth, that is, it is easy to stick steel pipe chips on the tap thread and front corner surface. The use of one-on-one tapping oil with steel pipes has a better effect and can be directly applied. In addition, tapping oil and engine oil can also be self configured, but the ratio must be appropriate.