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Rust removal methods and techniques for carbon steel tees

2024-09-29

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Carbon steel tees mainly use wire brushes and other tools to polish the surface of steel pipes, which can remove loose or raised oxide scale, rust, welding slag, etc. Manual tool rust removal can reach Sa2 level, and power tool rust removal can reach Sa3 level. If the surface of the steel pipe is firmly attached to the oxide scale, the tool rust removal effect is not ideal, and the anchor pattern size required by the anti-corrosion (based on actual reports) (based on actual reports) construction cannot be achieved.

Rust removal methods and techniques for carbon steel tees: Cathode treatment is performed in a solution containing 5%-10% (wt) of potassium iodide 1g/L. Voltage 6V, time 30s, temperature room temperature, cathode current electrolysis, a brown-black film layer is generated on the surface of the carbon steel tee, and it is fully rinsed to remove oil stains and fragments. The steel pipe products with brown film are placed in the chrome plating tank for chrome plating, which can obtain decorative chrome or hard chrome plating with excellent bonding strength. The brown film dissolves at a suitable speed during chrome plating, and no obvious pollution occurs, and the original surface does not deteriorate.

Since carbon steel tees have a wide variety of components, shapes, and pre-plating conditions, appropriate process flows and process specifications, as well as special fixtures, should be adopted according to actual conditions.

When tapping carbon steel tees, the selection of tapping oil is also very important. Tapping oil must have excellent cooling, lubricating and anti-rust functions. If the tapping oil has a poor lubrication effect, the tapped thread finish will be poor, and the tapping resistance of the tap will be large. If the tapping oil has a poor cooling effect, the tap will easily stick to the teeth, that is, the steel pipe chips will easily stick to the tap thread and the front angle surface. The one-to-one tapping oil for steel pipes has a better effect and can be used directly. In addition, tapping oil and engine oil can also be used to prepare by yourself, but the ratio must be appropriate.


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