904L stainless hlau phajyog ib hom austenitic stainless hlau uas muaj cov pa roj carbon tsawg heev thiab siab alloying tsim rau ib puag ncig nrog hnyav corrosive.Nws muaj kev tiv thaiv corrosion zoo dua316l uathiab317l ua, thaum coj mus rau hauv tus account tus nqi, kev ua tau zoo, thiab tus nqi-zoo.siab dua.Vim qhov sib ntxiv ntawm 1.5% tooj liab, nws muaj kev tiv thaiv zoo heev tiv thaiv kev txo cov acids xws li sulfuric acid thiab phosphoric acid.Nws kuj muaj kev tiv thaiv zoo heev tiv thaiv kev ntxhov siab corrosion pitting thiab crevice corrosion tshwm sim los ntawm chloride ions, thiab muaj kev tiv thaiv zoo rau intergranular corrosion.Nyob rau hauv ntshiab sulfuric acid nyob rau hauv lub concentration ntau ntawm 0-98%, qhov kev pab cuam kub ntawm 904L steel phaj yuav siab li 40 degrees Celsius.Nyob rau hauv ntshiab phosphoric acid nyob rau hauv lub concentration ntawm 0-85%, nws corrosion kuj yog heev zoo.Hauv kev lag luam phosphoric acid uas tsim los ntawm cov txheej txheem ntub dej, impurities muaj kev cuam tshuam zoo rau corrosion.Ntawm txhua yam ntawm phosphoric acid, 904L super austenitic stainless hlau muaj corrosion kuj zoo dua li qub stainless hlau.Nyob rau hauv muaj zog oxidizing acids, 904L stainless hlau muaj qis corrosion kuj dua li sib txawv heev alloyed steel hom.nyob rau hauv no concentration ntau.Lub corrosion kuj ntawm 904L steel yog zoo dua li cov pa stainless hlau.904L stainless hlau muaj kev ua haujlwm siab rau pitting corrosion.Nws tiv taus crevice corrosion hauv cov tshuaj chloride.Lub zog kuj zoo heev.Cov ntsiab lus siab nickel ntawm904L steel phajtxo tus nqi corrosion hauv pits thiab seams.Vim nws cov ntsiab lus siab nickel, 904L muaj kev tiv thaiv siab rau kev ntxhov siab corrosion tawg hauv cov tshuaj nitride, cov ntsiab lus hydroxide cov ntsiab lus thiab hydrogen sulfide-nplua nuj ib puag ncig.
Post lub sij hawm: Nov-20-2023