First of all, let's make it clear to everyone that the treatment of corrosion and rust on the outer surface of the steel after bending will affect the service life of the steel by 50%. Therefore, it is necessary to do the work of rust prevention and rust removal. In this case, we can use tools to derust.
The surface of the steel is mainly polished by using a wire brush or the like to remove loosened or lifted scale, rust, welding slag, and the like. The hand tool can achieve the Sa2 level by rust removal, and the power tool can achieve the Sa3 level by rust removal. Solvents and emulsions are used to clean the surface of steel to remove oil, grease, dust, lubricants and similar organic matter. However, it cannot remove rust, scale, flux, etc. on the surface of steel, so it is only used as an auxiliary means in anti-corrosion production.
Generally, chemical cleaning and electrolysis are used for pickling treatment. The steel bending and 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 pollute the environment.
The jet rust removal is driven by a high-power motor to rotate the jet blades at high speed, so that the abrasives such as steel grit, steel shot, wire segment and mineral are sprayed under the action of centrifugal force, which can completely remove rust, oxide and dirt. And the elbow can achieve the required uniform roughness under the action of abrasive violent impact and friction.
After jet rust removal, not only can the physical adsorption of the curved surface of the profiled steel be enlarged, but also the mechanical adhesion of the coating layer to the surface of the pipe can be enhanced. Therefore, spray (throwing) radiation derusting is the ideal way to remove corrosion from pipelines.
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