45# seamless steel pipe will inevitably be rusted when it is stored for a long time. once the seamless steel pipe is rusted, it is not easy to sell. What measures do we have to remedy the rust of seamless steel pipe?
1. Cleaning: clean the surface of seamless steel pipe with solvent and emulsion to remove oil, grease, dust, lubricant and similar organics, but it can not remove rust, scale and welding flux on the surface of seamless steel pipe. Therefore, it is only used as an auxiliary means in anti-corrosion production.
2. Tool derusting: steel wire brush and other tools are mainly used to polish the surface of seamless steel pipe to remove loose or warped oxide scale, rust, welding slag, etc. The derusting of manual tools can reach grade SA2 and that of power tools can reach grade SA3. If the surface of seamless steel pipe is firmly attached with iron oxide scale, the derusting effect of tools is not ideal and can not reach the anchor depth required for anti-corrosion construction.
3. Acid pickling: generally, chemical and electrolytic methods are used for acid pickling. only chemical acid pickling is used for pipeline anti-corrosion, which can remove oxide scale, rust and old coating. Sometimes it can be used as reprocessing after sand blasting. Chemical cleaning can make the surface reach a certain cleanliness and roughness, but
Its anchor pattern is shallow and easy to pollute the environment.
4. Spraying (throwing) derusting: spraying (throwing) derusting is to drive the spraying (throwing) blade to rotate at high speed through a high-power motor, so that the steel sand, steel shot, iron wire section, minerals and other abrasives can spray (throw) the steel pipe surface under the action of centrifugal force, which can not only completely remove iron rust, oxides and dirt, but also the seamless steel pipe under the action of violent impact and friction of abrasives, It can also achieve the required uniform roughness.