Specific surface measurement of ERW Steel Pipe

Specific surface measurement of ERW carbon steel pipe

1, clean

Using solvent, emulsion steel surface cleaning, to remove oil, grease, dirt, lubricants, and similar organic matter, but it cannot remove rust, scale, such as welding flux on the surface of the steel, so only as auxiliary means in the anti-corrosion coating steel pipe production.

2, tools, cleaning

Main USES steel wire brush tool for steel surfaces such as grinding, can remove loose or cock scale, rust, slag, etc. Hand tools can achieve derusting Sa2 level, power tool cleaning can reach grade Sa3, if solid iron oxide adhered on the surface of the steel, tool cleaning effect is not ideal, anchor pattern depth of anticorrosion construction requirements.

3, pickling

Commonly used chemical and electrolytic pickling process, two methods do use only pipeline anticorrosion chemical pickling, can remove scale, rust, old coating, sometimes can be used as sandblasting derusting after reprocessing. Chemical cleaning while can make the surface reaches a certain cleanness and roughness, but the anchor lines shallow, and easy to damage to the environment.

4, shot derusting spray (left)

Spray (cast) shot derusting spray is driven by high-power motor (cast) shoot high-speed rotating blades, make steel grit, steel shot, segment, minerals and other abrasive wire under the action of centrifugal force on steel pipe surface spray (cast) processing, not only can thoroughly remove rust, oxides and dirt, and steel pipe under the action of abrasive violent impact and friction, also can achieve the required uniform roughness.

After shot derusting spray (left), not only can enlarge the physical adsorption on the surface of the pipe, and can enhance anti-corrosion layer and mechanical adhesion on the surface of the coating steel pipe. Therefore, shot derusting spray (cast) is an ideal cleaning pipeline corrosion protection method. In general, shot peening (sand) cleaning is mainly used for the pipe inner surface treatment and shot (sand) is mainly used for pipe derusting outside surface treatment.