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Method for anticorrosion and rust removal of seamless steel pipe

The first way: 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 cause pollution to the environment.
II: 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.
Three: Tool Derusting
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. Cold drawn seamless steel pipe manual tool rust can reach Sa2 level, power tool rust can reach Sa3 level, if the steel surface is attached with a solid iron oxide skin, tool rust removal effect is not satisfactory, can not reach the depth of anchorage requirements of anti-corrosion construction requirements
Four: spray (throw) shot rust
Spraying (throwing) shot rust removal is driven by a high-powered motor to rotate the jet (throwing) shot blade 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.
After spraying (throwing) shot rust removal, not only can the physical adsorption of the pipe surface be enlarged, but also the mechanical adhesion of the anti-corrosion layer to the pipe surface can be enhanced.

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