Four Methods For Rust Removal Of LSAW Steel Pipe

1. Cleaning

Use solvent and emulsion to clean the surface of lsaw steel pipe to remove oil, grease, dust, lubricant and similar organic matter, but it can not remove rust, scale, flux, etc. on the surface of large-diameter straight seam steel pipe, so it is in anti-corrosion production. Only used as an aid.

2. Tool rust removal

The surface of a lsaw steel pipe is mainly polished by using a wire brush or the like to remove loose or raised scale, rust, welding slag, and the like. The descaling of manual tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the surface of large-diameter straight seam steel pipe is attached with strong iron oxide scale, the rust removal effect of the tool is not ideal, and the anchoring depth required for anti-corrosion construction is not reached.

3. Pickling

Generally, chemical cleaning and electrolysis are used for pickling treatment. Pipeline anti-corrosion is only chemical pickling, which can remove scale, rust and old coating, and can sometimes be used as re-treatment after sandblasting and rust removal. Although chemical cleaning can achieve a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause environmental pollution.

4. Spray (throwing) shot rust removal

Spraying (polishing) rust removal is a high-speed motor that drives the spray (throwing) to rotate the blade at high speed, so that the abrasive grains such as steel grit, steel shot, wire segment and mineral are sprayed (throwing) on ??the surface of the steel tube under the action of centrifugal force. Not only can rust, oxide and dirt be completely removed, but the large-diameter straight-slit steel pipe can achieve the required uniform roughness under the action of abrasive violent impact and friction.

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