How to remove rust from stainless steel pipes

The method of rust removal of stainless steel pipe is as follows:
1. Cleaning
Using emulsion to clean the surface of stainless steel pipes can remove grease, dust, lubricants and similar organic matter, but it cannot remove rust, scale, etc. on the steel surface, so it is only used as an auxiliary means in anti-corrosion production.
2. Tool derusting
Use tools such as wire brushes to polish the surface of stainless steel pipes to remove loose or raised scale, rust, etc. Hand tool derusting can reach Sa2 level, and power tool derusting can reach Sa3 level, but if the stainless steel pipe surface is attached with a firm oxide scale, the rust removal effect of the tool is not ideal.
3. Pickling
Generally, two methods of chemical and electrolytic pickling are used for pickling treatment. Only chemical pickling is used for pipeline anticorrosion, which can remove scale, rust, and old coatings. Sometimes it can be used as retreatment after sandblasting and rust removal. Although chemical cleaning can achieve a certain degree of cleanliness and roughness on the surface, its anchor pattern is shallow and easily pollutes the environment.
4. Projection derusting
Projectile derusting is a high-speed rotation of the projecting blades driven by a high-power motor, so that abrasives such as steel grit, steel shots, iron wire segments, and minerals are projected on the surface of the steel pipe under the action of centrifugal force, which can not only remove rust, oxides and dirt, Moreover, under the violent impact and friction of abrasives, the steel pipe can still achieve the required uniform roughness. After projectile rust removal, not only the physical adsorption on the surface of the pipe can be expanded, but also the mechanical adhesion between the anti-corrosion layer and the surface of the pipe can be enhanced. Therefore, projectile derusting is a derusting method for external surface treatment of stainless steel pipes and pipeline anticorrosion.