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Rust removal method for large diameter straight seam steel pipe
Release time:
2022-07-28
Use organic solvents and solvents to clean the surface of stainless steel plates to remove oil, vegetable grease, dust, lubricating fluid and similar organic compounds, but it cannot remove rust, oxide skin, welding agent, etc. on the surface of stainless steel plates, so it is only used as an auxiliary method in the work of Fangfu.
1. cleaning
Use organic solvents and solvents to clean the surface of stainless steel plates to remove oil, vegetable grease, dust, lubricating fluid and similar organic compounds, but it cannot remove rust, oxide skin, welding agent, etc. on the surface of stainless steel plates, so it is only used as an auxiliary method in the work of Fangfu.
2. pickling passivation
Generally, organic chemistry and electrolysis are used to do pickling and passivation. Only organic chemical pickling and passivation are used for steel pipe corrosion prevention, which can remove oxide scale, rust and old coating. Sometimes it can be used as a solution after shot blasting and derusting. Although chemical water treatment can make the surface layer to a certain degree of cleanliness and surface roughness, but its anchor is shallow, and it is very easy to cause environmental pollution to the surrounding environment.
Anti-rust treatment of special tools for 3.
The key application of steel brushes and other special tools on the surface of stainless steel plate to carry out grinding and polishing, can remove loose oxide skin, rust, welding wear and so on. The anti-rust treatment of manual tools can achieve Sa2 level, and the anti-rust treatment of special tools for driving force can achieve Sa level 3. If the surface of stainless steel plate adheres to firm iron oxide scale, the actual effect of anti-rust treatment of special tools is not ideal, and cannot reach the anchor pattern deep layer specified by FRP anti-corrosion.
4. gushing anti-rust treatment
The gushing anti-rust treatment is based on the high-power motor driving the gushing leaves to run at high speed, so that wear-resistant materials such as steel balls, gold steel grit, fine iron wire segments, minerals and the like can gush the surface of straight seam steel pipes under the strong centripetal force effect of the motor. Not only can metal oxides, rust and wastes be completely eliminated, but also the straight seam steel pipes can achieve the necessary uniform surface roughness under the effect of strong impact and friction.
After the gushing anti-rust treatment, it can not only expand the physical absorption effect of the water pipe surface, but also improve the adhesion effect of the anti-corrosion layer and the mechanical equipment on the water pipe surface. Therefore, the surge anti-rust treatment is an ideal anti-rust treatment method for steel pipe corrosion. Generally speaking, the key to shot blasting anti-rust treatment is to treat the metal surface inside the water pipe, and the key to sand blasting and rust removal is to treat the metal surface outside the straight seam steel pipe.
In the processing process, the relevant performance indexes of anti-rust treatment should be strictly managed to avoid the damage to the straight seam steel pipe due to wrong operation. After the straight seam steel pipe undergoes embroidery removal, the appearance of the goods will be smoother than before embroidery removal. The embroidery removal of the straight seam steel pipe is a technology often used in the steel pipe manufacturing industry.
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