1, Cleaning
The application of solvents, emulsions to clean the steel appearance, to get rid of oil, grease, dust, smoothagent and similar organic matter, but it can not remove the steel appearance rust, skin oxide, welding, etc, so in the anti-corrosion production only as a side trick.
2, Tool rust removal
The first use of wire brush and other tools to polish the steel exterior, can remove loose or raised oxide skin, rust, solder slag and so on. Hand tool rust removal can reach Sa2 level, power tool rust removal can reach Sa3 level, if the steel exterior adheres to the strong iron oxide skin, tool rust removal results are not ideal, can not reach the anchor line depth required for anti-corrosion construction.
3, Pickling
Common chemical and electrolytic two methods to do acid washing disposal, pipe corrosion only using chemical acid washing, can be removed skin oxide, rust, old coating, and sometimes can be used as sand blasting after rust disposal. Chemical cleaning can make the appearance reach the necessary cleanliness and coarseness, but its anchor is shallow, and easy to form pollution to the situation.
4, Spray (throw) shot rust Spray (throw) fire rust is through a high-power motor to drive the spray (throw) blade high-speed twist, so that steel sand, steel pills, wire sections, minerals and other abrasives in the force effect of the steel pipe surface spray (throw) shot disposal, not only can be completely cleared of rust, oxides and dirt, and the steel pipe in the fierce impact of abrasives and grinding force,
It also reaches the average roughness required. After spraying (throwing) rust, not only can expand the physical adsorption effect of the tube appearance, but also strengthen the mechanical adhesion effect of the anti-corrosion layer and the tube appearance. Therefore, spray (throw) rust removal is the ideal method of corrosion removal of pipes. Generally speaking, the blast (sand) rust removal is primarily used for the external disposal of the tube, and the blast (sand) rust removal is first used for the surface disposal of the tube.
