Although the anti-corrosion spiral tube has the very good antiseptic effect, but also needs to carry on the anti-corrosion spiral tube surface treatment, this is guarantees the spiral tube service life key factor.
The surface treatment of the anti-corrosion spiral tube includes the following:
The use of solvents, emulsions to clean the surface of steel to achieve the removal of oil, grease, dust, lubricants and similar organic matter, but it can not remove the steel surface rust, oxidation skin, welding drugs, etc., so in the anti-corrosion production only as an auxiliary means.
2, Tool derusting The main use of steel wire brushes and other tools to polish the surface of steel, you can remove loose or warped oxidation of the skin, rust, welding slag and so on.
The manual tool derusting can reach the Sa2 level, the power tool derusting can reach the Sa3 level, if the steel surface attaches the solid iron oxide skin, the tool derusting effect is not ideal, cannot reach the anchorage depth which the anti-corrosion construction request.
3, pickling In general, the chemical and electrolytic methods to do acid pickling, pipeline anti-corrosion only chemical pickling, can be removed from the oxidation of the skin, rust, the old coating, sometimes used as a sandblasting rust after reprocessing.
Although chemical cleaning can make the surface to achieve a certain degree of cleanliness and roughness, but its anchor texture is shallow, and easy to environmental pollution.
4, spray (throw) the removal of rust Spray (throw) The removal of rust is through high-power motor driven spray (cast) The blade high-speed rotation, so that steel sand, steel pill, wire section, minerals and other abrasives under the centrifugal force on the surface of anti-corrosion steel pipe Spray (cast), not only can thoroughly remove rust, oxides and dirt, and anti-corrosion steel pipe in the abrasive impact and friction force, under the action of can also achieve the required uniform roughness.