How Many Ways Can Remove The Rust On The Surface Of The Spiral Welded Pipe?

1. Clean up

Organic solvents and moisturizing emulsions are used to clean the steel surface to remove oil, grease, stains, leveling agents, and similar organic chemicals, but they cannot remove rust, dirt, flux, etc. on the steel surface, so They are only used as an auxiliary method in corrosion resistance manufacturing.

2. Spray (throw) to remove rust

Carry out sprayer (polishing) rust removal through a high-power motor, run the painting head at high speed, and then spray abrasives such as emery, steel balls, iron wire fragments, and minerals to the seamless surface under the influence of centripetal force on the steel pipe surface. It can not only completely remove rust, oxides, and dust, but also the seamless steel pipe can achieve the required average surface roughness under rough impact and friction.

After painting (polishing) and derusting, it can increase the physical adsorption effect of the outer surface of the tube. It can also improve the mechanical bonding effect between the corrosion-resistant layer and the inner surface of the tube. Therefore, spray (polish) rust removal is the ideal method for pipeline rust removal. Generally, shot blasting is mainly used for the internal and external treatment of pipelines, and shot blasting is mainly used for the metal surface treatment of pipelines.

3. Derusting with special tools

First of all, use tools such as steel brushes to polish the steel surface to remove loose or elongated scales, rust, weld penetration, etc. The rust removal ability of hand tools can reach Sa2 level, and the rust removal ability of pneumatic tools can reach Sa level three. If the strong chemical scale has adhered to the steel surface, the derusting effect is not ideal, and the steel anchorage depth required by the anti-corrosion structure cannot be obtained.

4. Pickling and passivation

Organic chemistry and electrolysis methods are generally used, which can be used as sandblasting after pickling and passivation, organic chemical pickling and passivation for steel pipe anti-corrosion, scale, rust, old coating removal, and derusting. Chemical water treatment may inevitably look unsmooth, but the steel anchor pattern is shallow and susceptible to environmental pollution.