With China's sustained economic development, the state vigorously develop the energy sector, long-distance oil pipeline and gas pipeline are an important way to energy security in the oil and gas pipeline anti-corrosion construction process, the steel pipe anti-corrosion surface treatment is to determine the key factors of life First, it is the anti-corrosion layer and the tube can firmly with the premise. Verified by research institutions, in addition to the life of the coating depends on the type of coating, coating quality and construction environment and other factors, the steel surface treatment on the life of the coating of about 50%, therefore, should be strictly in accordance with the anti-corrosion layer specification steel surface, continually explore and summarize, and constantly improve steel surface treatment method.
1, the pipe by solvent cleaning, emulsion cleaning the steel surface, in order to achieve the removal of oil, grease, dust, lubricants and similar organic matter, but it can not remove the steel surface rust, oxide, flux, etc., so the production of anti-corrosion only as an adjunct.
2, the main use of tools rust steel wire brushes and other tools for steel surface sanding, you can remove loose or warped oxide, rust, welding slag. Hand tools rust can reach Sa2 grade power tools rust Sa3 level can be achieved, if the steel surface firmly attached to the iron skin, the effect is not ideal tools rust, anti-corrosion construction required to reach the depth of anchor pattern.
3, steel pickling generally use two methods to do chemical and electrolytic pickling treatment, pipeline corrosion using only chemical pickling can descaling, rust, old paint, sometimes used as a sand blasting after reprocessing . Although chemical cleaning can achieve a certain surface cleanliness and roughness, but the anchor pattern shallow, and easy on the environment caused by pollution.
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