904L stainless hlau phajyog ib hom hlau austenitic stainless hlau nrog cov ntsiab lus carbon tsawg heev thiab cov khoom sib xyaw siab tsim rau cov chaw uas muaj cov xwm txheej corrosive hnyav. Nws muaj kev tiv thaiv corrosion zoo dua li316Lthiab317L, thaum xav txog tus nqi, kev ua tau zoo, thiab kev siv nyiaj tsim nyog. siab dua. Vim yog ntxiv 1.5% tooj liab, nws muaj kev tiv thaiv corrosion zoo heev tiv thaiv kev txo cov kua qaub xws li sulfuric acid thiab phosphoric acid. Nws kuj muaj kev tiv thaiv corrosion zoo heev tiv thaiv kev ntxhov siab corrosion pitting thiab crevice corrosion los ntawm chloride ions, thiab muaj kev tiv thaiv zoo rau intergranular corrosion. Hauv cov kua qaub sulfuric ntshiab hauv qhov concentration ntau ntawm 0-98%, qhov kub ntawm 904L steel phaj tuaj yeem siab txog 40 degrees Celsius. Hauv cov kua qaub phosphoric ntshiab hauv qhov concentration ntau ntawm 0-85%, nws qhov kev tiv thaiv corrosion zoo heev. Hauv kev lag luam phosphoric acid tsim los ntawm cov txheej txheem ntub dej, cov khoom tsis huv muaj kev cuam tshuam loj rau kev tiv thaiv corrosion. Ntawm txhua hom phosphoric acid, 904L super austenitic stainless hlau muaj kev tiv thaiv corrosion zoo dua li cov hlau stainless hlau ib txwm muaj. Hauv cov kua qaub oxidizing muaj zog, 904L stainless hlau muaj kev tiv thaiv corrosion qis dua li ntau hom hlau alloyed siab. hauv qhov concentration ntau no. Kev tiv thaiv corrosion ntawm 904L hlau zoo dua li cov hlau stainless hlau ib txwm muaj. 904L stainless hlau muaj kev tiv thaiv zoo rau kev xeb pitting. Nws tiv thaiv kev xeb crevice hauv cov tshuaj chloride. Lub zog kuj zoo heev. Cov ntsiab lus nickel siab ntawm904L hlau phajtxo qhov xeb hauv cov qhov thiab cov seams. Vim nws cov nickel ntau, 904L muaj kev tiv thaiv siab rau kev ntxhov siab corrosion cracking hauv nitride kua, concentrated hydroxide kua thiab hydrogen sulfide-nplua nuj ib puag ncig.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-20-2023