The Chemical Pipeline Inflates The Festival Corrosion Mechanism And The Protection Engineering Research

As an important form of pipe displacement compensation, recently, bellowsexpansion joints are used very widely in many fields such as petrochemical,metallurgy, electric power, cement, building and heat providing of cities. However, in practice, the main failure way of the stainless steel bellows is corrosion, especially stress corrosion, while fatigue or any other abnormal factors are not popular. According to stainless steel corrugated pipe in use this characteristic, the present paper begins from the stainless steel inflation festival residual stress elimination and the corrosion environment isolation experiment aspect, through to inflates the festival the solid solution treatment elimination residual stress influence, simultaneously uses the coating method isolation environment, prevents the stainless steel inflation festival effectively the corrosion.The paper research work mainly obtains from following two aspects.Namely:1. Stress corrosion experimental study.Reference country related standard GB4334-84 "the stainless steel 42%MgCl2 stress corrosion testing method", around the solid solution treatment stainless steel corrugated pipe will place the ebullition in the 42%MgCl2 solution to carry on the stress corrosion experiment, the solid solution treatment to enhances the stainless steel corrugated pipe the anti-stress corrosion performance will be effective.2. Corrosions hangs the piece experimental study. Through carries on with the environment isolates, Protects the stainless steel inflation festival effectively the corrosion, the fluorine carbon anticorrosion coating has the good anode protective function and the shielding properties to the metal substrate, After passed through the long-term acceleration immersion still to be able to maintain this kind strongly to adhere to stick cohere ability, maintained the long-term anticorrosion performance for the coating to provide the guarantee.Through the present paper research, may confirm that,The solid solution treatment is improves and sharpens the austenite stainless steel corrugated pipe anti-stress corrosion ability the effective action; The coating protection is the rust steel inflation festival effective isolation adverse circumstance method.