In the purchase of raw materials for the production of steel pipe legs, we will choose square pipes of different sizes. But when there is inevitably rust, the following is the way we clean after the square tube is rusted.
1. Square tube cleaning, using solvent and emulsion to clean the surface of steel to remove oil, grease, dust, lubricant and similar organic matter, but it can not remove rust, scale, flux, etc. on the surface of steel, so it is in anti-corrosion production. Only as an aid.
2. The square tube tool is used for rust removal. The surface of the steel is polished by tools such as wire brush, which can remove loose or raised scale, rust and welding slag. The rust removal of the hand tool can reach the Sa2 level, and the rust removal of the power tool can reach the Sa3 level. If the steel surface is adhered with a strong iron oxide scale, the rust removal effect of the tool is not ideal, and the anchor depth required for the anti-corrosion construction cannot be achieved.
3, square tube pickling, generally chemical and electrolytic two methods of pickling, pipeline anti-corrosion only chemical pickling, can remove oxide scale, rust, old coating, and sometimes can be used as sandblasting after rust removal deal with. Although chemical cleaning can achieve a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to pollute the environment.
4, square tube spray (throwing) shot derusting is driven by high-power motor to spray (drow) the high-speed rotation of the blade, so that the steel sand, steel shot, wire section, minerals and other abrasives under the centrifugal force on the surface of the other tube ( The throwing treatment not only completely removes rust, oxides and dirt, but also achieves the required uniform roughness under the action of abrasive impact and friction.