Anti-corrosion steel pipe refers to do anti-corruption treatment for the ordinary steel pipe withspecial technology, making the steel pipe equipped certain corrosion resistance.Generally used in waterproof, anti-rust, acid and alkali proof, anti-oxidation and so on.Different needs, different inside and outside wall corresponding anti-corrosion measures.Common are: epoxy coal tar anti-corrosion, anti-corrosion epoxy coatings, urethane paint anticorrosion, IPN8710 water pipeline corrosion protection, non-toxic paint anti corrosion,anti-corrosion polymer coating, steel pipe lining anti corrosion cement mortar, etc.Anti-corrosion steel pipe is mainly used in special requirement or engineering field with badenvironment.According to the steel pipe using location can be divided into the outdoor steel pipe anti corrosionand buried steel pipelines anti corrosion.The ground: special surface coating anti-corrosive paint is still the main method of steelconstruction and rack anti-corrosion. Anti-corrosive paint protection function can be divided intothe primer, middle paint and top paint, all the layers of paint have its characteristics, individual,several layers together, forming a composite coating, improve the anti-corrosion performance andprolong service life.Underground: the corrosion reason of outer wall is more complex, such as soil corrosion and straycurrent corrosion, microbiological corrosion and so on, should choose a kind of good insulation,chemical stability, resistance to plant roots antimicrobial antiseptic material. Buried steel pipelineouter wall corrosion mainly is electrochemical corrosion, coating anti-corrosion layer in the outerwall of pipe is the most commonly used method. The outer coating can reduce or block thecorrosion current and slow down the corrosion. Suggest using epoxy coal tar anti-corrosion, thereare national standard to depend on.Coated steel pipe is formed with plastic on the high-frequency welded steel pipe and largediameter spiral welded pipe, the most great outer diameter of 1200 mm. According to the differentneeds, coating polyvinyl chloride (PVC), polyethylene (PE), epoxy resin (EPOZY), and othervarious plastic coating performance, with good adhesion and strong corrosion resistance, can resistthe corrosion of strong acid, strong alkali and other chemical corrosion, non-toxic, no rust, wearresistance, impact resistance, strong resistance to permeability, smooth pipe surface, no adhere toany materials, can reduce the transmission resistance, improve the efficiency of traffic andtransportation, reduce the pressure loss.Coating without solvent, no leakage material, so that it can't pollute the conveying medium, so asto ensure the purity of fluid and health, in 40 to + 80 range can be used with cold and heatcycles, not aging, not cracking, thus it can be used in cold zone and other harsh environment.Large-diameter coated steel pipe is widely used in tap water, natural gas, petroleum, chemicalindustry, medicine, communication, electric power, ocean engineering, etc.