Anti-corrosion steel pipe refers to steel pipes that have been processed by anti-corrosion technology, which can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reactions during transportation and use. At present, the global annual loss due to steel pipe corrosion is as high as 500 billion US dollars. Anti-corrosion steel pipes can effectively prevent or slow down corrosion, prolong the service life of steel pipes, and reduce the operating cost of steel pipes.
1. The main production methods of anti-corrosion steel pipes and seamless steel pipes are hot rolling and cold drawing. Since the seamless steel pipe material is a metal material, a series of defects such as iron scale, cold shut, and pores may occur during the production process, which not only affects its mechanical properties, but also causes corrosion and cracking during use. Therefore, the hot rolling process is generally used in the production of seamless steel pipes and anti-corrosion steel pipes.
2. The main difference between anti-corrosion steel pipe and seamless steel pipe is the anti-corrosion treatment of the inner lining of the steel pipe.
Due to the fusion bonded epoxy powder coating on the inner wall of the anti-corrosion steel pipe, it has good corrosion resistance and mechanical properties. The inner wall is coated with a layer of epoxy coal tar pitch anti-corrosion paint (also known as three-layer PE anti-corrosion paint) to make it have better acid and alkali resistance and cathode resistance. In addition, due to the good acid and alkali resistance and cathode resistance of the epoxy powder coating on the inner wall of the anti-corrosion steel pipe, it can ensure that the steel pipe has better durability after being buried. Moreover, the anti-corrosion coating on the outer wall of the anti-corrosion steel pipe and seamless steel pipe is directly coated with epoxy coal tar pitch paint or PE or other materials on the outer wall of the steel pipe, which has strong corrosion resistance.