Hauv ntau daim ntawv thov kev lag luam, stainless hlau tuaj yeem muab kev ua haujlwm zoo corrosion. Raws li kev paub dhau los ntawm kev siv, ntxiv rau kev ua haujlwm tsis ua haujlwm, kev xeb ntawm stainless hlau feem ntau yog tshwm sim raws li hauv qab no: daim ntawv loj ntawm corrosion ntawm stainless hlau yog ib feem corrosion (xws li kev nyuaj siab corrosion cracking, pitting corrosion, intergranular corrosion, corrosion qaug zog thiab. corrosion kuj). Cov teeb meem tsis ua hauj lwm tshwm sim los ntawm cov kev txhim kho ib nrab no suav nrog yuav luag ntau dua li ib nrab ntawm cov xwm txheej tsis ua haujlwm. Qhov tseeb, ntau yam kev ua tsis tiav tuaj yeem tiv thaiv los ntawm kev xaiv cov khoom tsim nyog.
Stress Corrosion Cracking [SCC]: Ib lo lus dav dav rau kev sib nrig sib tsis ua hauj lwm ntawm kev ntxhov siab alloys hauv ib puag ncig corrosive vim kev loj hlob ntawm cov kab muaj zog. Kev nyuaj siab corrosion cracking muaj ib tug nkig puas morphology, tab sis nws kuj yuav tshwm sim nyob rau hauv cov ntaub ntawv uas ductile heev. Cov xwm txheej tsim nyog rau kev ntxhov siab corrosion tawg kom tshwm sim yog qhov muaj kev ntxhov siab tensile (txawm tias qhov kev ntxhov siab residual los yog siv kev ntxhov siab, los yog ob qho tib si) thiab ib qho nruab nrab corrosive. Kev tsim thiab nthuav dav ntawm qhov profile yog kwv yees li perpendicular mus rau kev coj ntawm tensile kev nyuaj siab. Tus nqi kev ntxhov siab uas ua rau muaj kev ntxhov siab corrosion tawg yog me dua li qhov kev ntxhov siab uas yuav tsum tau ua kom tawg cov khoom hauv qhov tsis muaj corrosive media. Microscopically, cov kab nrib pleb uas dhau los ntawm cov nplej yog hu ua cov kab nrib pleb transgranular, thiab cov kab nrib pleb uas nthuav dav raws cov kab lis kev cai yog hu ua intergranular tawg. qhov kev ntxhov siab nce mus txog nws qhov kev ntxhov siab tawg hauv huab cua], tom qab ntawd cov khoom tawg raws li ib txwm tawg (hauv cov ntaub ntawv ductile, feem ntau yog los ntawm kev sib sau ntawm microscopic defects). Yog li, ib feem ntawm ib feem uas ua tsis tiav vim muaj kev ntxhov siab corrosion cracking yuav muaj cov yam ntxwv ntawm kev ntxhov siab corrosion cracking nrog rau "dimples" cheeb tsam cuam tshuam nrog aggregates ntawm microdefects.
Pitting corrosion: yog ib feem ntawm corrosion uas ua rau corrosion.
Intergranular corrosion: Cov ciaj ciam ntawm cov nplej yog cov ciam teb ntawm kev tsis sib haum xeeb ntawm cov nplej nrog txawv crystallographic orientations. Yog li ntawd, lawv muaj txiaj ntsig zoo rau kev sib cais ntawm ntau yam ntsiab lus los yog nag lossis daus ntawm cov hlau sib txuas (xws li carbides thiab delta theem) hauv cov hlau. District lub nroog. Yog li ntawd, hauv qee qhov kev tshaj tawm corrosive, nws tsis yog qhov xav tsis thoob tias cov ciam teb yuav raug etched ua ntej. Hom corrosion no yog hu ua intergranular corrosion, thiab feem ntau cov hlau thiab alloys tuaj yeem pom qhov cuam tshuam ntawm intergranular corrosion hauv qee cov xov xwm corrosive.
Crevice corrosion: yog ib daim ntawv ntawm ib nrab corrosion uas tuaj yeem tshwm sim hauv cov crevices qhov twg cov tshuaj tsis ruaj khov lossis nyob rau saum npoo ntawm daim ntaub thaiv. Xws li qhov khoob tuaj yeem tsim los ntawm cov hlau-rau-hlau lossis hlau-rau-tsis-hlau pob qij txha, piv txwv li, ntawm rivets, bolts, gaskets, valve rooj, xoob daim tawv nqaij deposits, thiab marine life tswm ciab.
General Corrosion: Ib lo lus siv los piav qhia txog qhov tshwm sim ntawm corrosion uas tshwm sim nyob rau hauv ib qho kev sib xws ntawm tag nrho cov saum npoo ntawm cov hlau. Thaum lub sij hawm corrosion tshwm sim, cov khoom hauv zos maj mam ua thinner vim yog corrosion, thiab txawm tias cov khoom tsis zoo vim corrosion. Stainless hlau tej zaum yuav nthuav dav corrosion nyob rau hauv muaj zog acids thiab alkalis. Cov teeb meem tsis ua hauj lwm vim qhov kev txhim kho corrosion tsis tshua muaj kev txhawj xeeb, vim qhov corrosion feem ntau tuaj yeem kwv yees los ntawm kev sim yooj yim raus dej los yog los ntawm kev tshuaj xyuas cov ntaub ntawv ntawm corrosion.
