904 stainless hlau phajyog ib hom austenitic stainless hlau uas muaj cov ntsiab lus carbon tsawg thiab siab alloying tsim rau ib puag ncig nrog hnyav corrosion. Nws muaj kev tiv thaiv corrosion zoo dua li 316L thiab 317L, thaum noj rau hauv tus nqi thiab kev ua haujlwm. Tus nqi zoo rau nyiaj. Vim qhov sib ntxiv ntawm 1.5% tooj liab, nws muaj kev tiv thaiv zoo heev tiv thaiv kev txo cov kua qaub 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 complex ions, thiab muaj kev tiv thaiv zoo rau intergranular corrosion. Nyob rau hauv ntshiab sulfuric acid nyob rau hauv lub concentration ntawm 0-98%, qhov kev pab cuam kub ntawm 904L steel phaj yuav siab li 40 degrees Fahrenheit.
Nyob rau hauv ntshiab 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 cov kua qaub, 904L super austenitic stainless hlau muaj kev tiv thaiv corrosion zoo dua li cov hlau tsis zoo. Nyob rau hauv muaj zog oxidizing nitric acid, 904L stainless hlau muaj qis corrosion kuj tshaj li alloyed hlau uas tsis muaj nyiaj. Nyob rau hauv hydrochloric acid, kev siv ntawm904L stainless hlau phajyog txwv rau qis concentrations ntawm 1-2%.
Nyob rau hauv ntshiab 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 cov kua qaub, 904L super austenitic stainless hlau muaj kev tiv thaiv corrosion zoo dua li cov hlau tsis zoo. Nyob rau hauv muaj zog oxidizing nitric acid, 904L stainless hlau muaj qis corrosion kuj tshaj li alloyed hlau uas tsis muaj nyiaj. Nyob rau hauv hydrochloric acid, kev siv ntawm904L stainless hlau phajyog txwv rau qis concentrations ntawm 1-2%.
| Qib | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| 904l ua | 0.020 max | max 2.00 Nws | max 1.00 Nws | 0.040 max | 0.030 max | 19.00 – 23.00 dr hab | 4.00-5.00 Nws | 23.00-28.00 Nws | 1.00-2.00 Nws |
Post lub sij hawm: May-23-2024