Tau ntev, corrosion yog ib qho mob taub hau tshaj plaws ntawm cov khoom siv tshuaj lom neeg, kev tsis saib xyuas me ntsis, cov khoom siv puas tsuaj, teeb meem hnyav, thiab txawm tias muaj kev puas tsuaj. Raws li cov ntaub ntawv txheeb cais, kwv yees li 60% ntawm kev puas tsuaj rau cov khoom siv tshuaj lom neeg yog tshwm sim los ntawm kev xeb, yog li peb yuav tsum xub ua tib zoo saib rau kev xaiv cov khoom siv thaum xaiv cov khoom siv tshuaj. Feem ntau muaj kev nkag siab yuam kev tias stainless hlau yog "cov khoom siv thoob ntiaj teb"; tsis muaj teeb meem dab tsi qhov nruab nrab thiab ib puag ncig puag ncig tuav stainless hlau li qub, nws yog qhov txaus ntshai.
Hauv qab no rau qee qhov kev siv tshuaj lom neeg, tham txog cov ntsiab lus tseem ceeb ntawm kev xaiv cov khoom siv:
Sulfuric acid
Raws li ib qho ntawm cov xov xwm corrosive heev, sulfuric acid yog ib qho tseem ceeb ntawm cov khoom siv raw nrog ntau yam kev siv. Kev xeb ntawm cov khoom los ntawm sulfuric acid ntawm qhov sib txawv thiab qhov kub thiab txias sib txawv heev. Cov pa roj carbon steel thiab cam khwb cia hlau muaj qhov zoo corrosion kuj rau cov concentrated sulfuric acid nrog ib qho concentration siab tshaj 80% thiab kub hauv qab 80 degree . Txawm li cas los xij, lawv tsis tsim nyog rau kev kub ceev-ntws sulfuric acid thiab ua cov khoom siv rau cov twj tso kua mis. Ordinary stainless hlau xws li 304 (0Cr18Ni9) thiab 316 (0Cr18Ni12Mo2Ti) kuj muaj kev txwv siv hauv sulfuric acid media. Yog li ntawd, lub twj tso kua mis rau kev thauj cov sulfuric acid feem ntau yog ua los ntawm high-silicon cam khwb cia hlau (uas nyuaj rau cam khwb cia thiab txheej txheem) thiab high-alloy stainless hlau (alloy 20 #). fluorine yas muaj cov tshuaj sulfuric acid zoo, ua rau cov fluorine-lined li qub tau nyiaj ntau dua.
Hydrochloric acid
Cov ntaub ntawv hlau feem ntau tsis tiv taus hydrochloric acid corrosion (xws li ntau yam khoom siv hlau tsis muaj steel), thiab molybdenum-muaj ferrosilicon tsuas yog siv rau hauv hydrochloric acid hauv qab 50 degree thiab 30%. Contrary to hlau cov ntaub ntawv, feem ntau cov ntaub ntawv uas tsis yog-hlau muaj corrosion kuj zoo rau hydrochloric acid, yog li roj hmab-lined li qub thiab yas li qub (xws li polypropylene, fluoroplastics, thiab lwm yam) yog qhov zoo tshaj plaws kev xaiv rau thauj hydrochloric acid.
Nitric acid
Feem ntau cov hlau yog corroded sai heev thiab puas nyob rau hauv nitric acid. Stainless hlau yog feem ntau siv nitric acid-resistant khoom thiab muaj corrosion kuj zoo rau tag nrho cov nitric acid concentrations ntawm chav tsev kub. Nws yog ib qho tsim nyog hais tias kev tiv thaiv corrosion ntawm molybdenum-muaj stainless hlau (xws li 316, 316L) rau nitric acid tsis tsuas yog tsis zoo dua li cov hlau tsis zoo tib yam (xws li 304, 321) tab sis qee zaum kuj hnyav dua. Rau high-temperature nitric acid, titanium thiab titanium alloy cov ntaub ntawv feem ntau yog siv.
Acetic acid
Nws yog ib qho ntawm cov corrosive tshaj plaws ntawm cov organic acids. Ordinary hlau yuav raug corroded hnyav nyob rau hauv acetic acid ntawm tej concentration thiab kub, tab sis stainless hlau yog ib qho zoo heev acetic acid-resistant khoom. Molybdenum-muaj stainless hlau (316) kuj haum rau kub kub thiab dilute acetic acid vapors. Rau kev xav tau xws li kub, siab concentration acetic acid, los yog lwm yam corrosive media, siab alloy stainless hlau li qub los yog fluoroplastic li qub tuaj yeem xaiv.