Qhov kev faib tawm ntawm cov kav hlau stainless los ntawm qhov twg?

Hauvstainless hlau kav, steel uas tiv taus corrosion los ntawm tsis muaj zog corrosive xov xwm xws li huab cua, chav, thiab dej, thiab tshuaj corrosive media xws li acid, alkali, thiab ntsev, kuj hu ua stainless acid-resistant steel.Hauv kev siv cov tswv yim, steels resistant rau tsis muaj zog corrosive xov xwm feem ntau hu ua stainless hlau, thiab steels resistant rau tshuaj media yog hu ua acid-resistant steel.Vim qhov sib txawv ntawm cov tshuaj muaj pes tsawg leeg ntawm ob, cov qub tsis tas yuav tiv taus corrosion los ntawm cov tshuaj lom neeg, thaum tom kawg yog feem ntau stainless.

Qhov thib ob, kev tiv thaiv corrosion ntawm cov kav hlau tsis muaj steel nyob ntawm cov hlau alloying muaj nyob hauv cov hlau.Chromium yog lub hauv paus ntsiab lus rau stainless hlau kom tau txais kev tiv thaiv corrosion.Thaum cov ntsiab lus ntawm chromium hauv cov hlau nce mus txog 1.2%, chromium cuam tshuam nrog corrosion.Cov nyhuv ntawm cov pa oxygen hauv cov khoom ua rau nyias oxide zaj duab xis rau saum npoo ntawm cov hlau, uas tuaj yeem tiv thaiv corrosion ntawm cov hlau.Lub substrate yog ntxiv corroded.Ntxiv nrog rau chromium, feem ntau siv alloying ntsiab yog npib tsib xee, molybdenum, titanium, niobium, tooj liab, nitrogen, thiab lwm yam.