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Will the cold-drawn seamless steel tubes rust? How to remove rust?
Apr 14, 2018

Cold-drawn seamless steel tubes are produced at very cold temperatures, require very low temperatures, require a variety of properties and a variety of uses are relatively good, so when cold-drawn seamless steel tubes are used more widely A kind of steel pipe. Although its use is relatively effective, it is a seamless steel pipe that is easier to rust because its composition is more active and the chemical elements are extremely active and can easily interact with oxygen in the air. reaction. How to remove rust after rusting for cold-drawn seamless steel pipes?

1, cleaning

Solvents and emulsions are used to clean steel surfaces to remove oil, grease, dust, lubricants, and similar organics. However, they cannot remove rust, oxide scales, and welding flux on steel surfaces. Therefore, they are only used as an aid in antiseptic production.

2, tool rust

The main use of wire brush and other tools on the surface of the steel, can remove loose or tilt of the scale, rust, welding slag and so on. Hand tool derusting can reach Sa2 level, and the derusting of power tools can reach Sa3 level. If the steel plate surface is attached with a solid iron oxide scale, the rust removal effect of the tool is not ideal, and the depth of the anchoring lines required for anti-corrosion construction cannot be reached.

3, pickling

General use of chemical and electrolytic methods for pickling, pipe anti-corrosion chemical pickling only, can remove oxide scale, rust, old coating, and sometimes can be used as a blasting rust after reprocessing. Although chemical cleaning can make the surface reach a certain degree of cleanliness and roughness, its anchorage is light and it is easy to pollute the environment.

4, spray (throw) shot rust

Spraying (throwing) shot rust removal is driven by a high-power motor to rotate the jet (throwing) jets at a high speed so that abrasives such as steel grit, steel shots, wire segments, and minerals are sprayed on the surface of the steel pipe under centrifugal force. Not only can it thoroughly remove rust, oxides, and dirt, but it can also achieve the required uniform roughness under the abrasive impact of abrasive and frictional forces.

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