904 stainless hlau phajyog ib hom hlau austenitic stainless hlau uas muaj cov pa roj carbon tsawg heev thiab muaj cov khoom sib xyaw ua ke siab tsim rau cov chaw uas muaj cov xwm txheej corrosion hnyav. Nws muaj kev tiv thaiv corrosion zoo dua li 316L thiab 317L, thaum xav txog ob qho tib si tus nqi thiab kev ua tau zoo. Tus nqi zoo rau cov nyiaj. 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 cov ions complex, 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 Fahrenheit.
Hauv cov kua qaub ntshiab hauv qhov ntau ntawm 0-85%, nws txoj 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 qhov cuam tshuam loj rau kev tiv thaiv corrosion. Ntawm txhua hom kua qaub, 904L super austenitic stainless hlau muaj kev tiv thaiv corrosion zoo dua li cov hlau stainless hlau ib txwm muaj. Hauv cov kua qaub nitric oxidizing muaj zog, 904L stainless hlau muaj kev tiv thaiv corrosion qis dua li cov hlau alloyed uas tsis muaj nyiaj. Hauv cov kua qaub hydrochloric, kev siv904L stainless hlau phajtsuas yog txwv rau qhov concentration qis dua ntawm 1-2%.
Hauv cov kua qaub ntshiab hauv qhov ntau ntawm 0-85%, nws txoj 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 qhov cuam tshuam loj rau kev tiv thaiv corrosion. Ntawm txhua hom kua qaub, 904L super austenitic stainless hlau muaj kev tiv thaiv corrosion zoo dua li cov hlau stainless hlau ib txwm muaj. Hauv cov kua qaub nitric oxidizing muaj zog, 904L stainless hlau muaj kev tiv thaiv corrosion qis dua li cov hlau alloyed uas tsis muaj nyiaj. Hauv cov kua qaub hydrochloric, kev siv904L stainless hlau phajtsuas yog txwv rau qhov concentration qis dua ntawm 1-2%.
| Qib | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| 904L | 0.020 siab tshaj plaws | siab tshaj 2.00 | siab tshaj 1.00 | 0.040 siab tshaj plaws | 0.030 siab tshaj plaws | 19.00 – 23.00 | 4.00 – 5.00 siab tshaj | 23.00 – 28.00 | 1.00 – 2.00 |
Lub sijhawm tshaj tawm: Tsib Hlis-23-2024