1 、 Cov txheej txheem tsim khoom: Qhov no yog ib qho laj thawj rau oxidation ntawm steel khoom.Nyob rau hauv cov nqe lus ntawm cov txheej txheem ntau lawm thiab cov yam ntxwv ntawm cov khoom, tsim ib tug nyias oxide zaj duab xis rau saum npoo ntawm cov khoom yog cov txheej txheem yooj yim kom tsis txhob oxidation, thiab nws kuj yog qhov sib txawv ntawm cov khoom steel.Ib qho ntawm cov yam ntxwv tseem ceeb ntawm lwm cov khoom siv hlau, tab sis thaum cov oxide zaj duab xis ua tsis tiav los yog ua tsis tiav vim tsis txaus lossis tsis saib xyuas ntau lawm, cov pa oxygen hauv huab cua yuav ncaj qha cuam tshuam nrog qee cov khoom hauv cov khoom, uas ua rau cov khoom zoo li qub.qhia oxidation.
2 、 Cov laj thawj rau cov khoom lag luam sib piv: txhawm rau txo cov nqi tsim khoom, qee lub tuam txhab txo qis qhov feem ntawm qee cov ntsiab lus tseem ceeb xws li chromium thiab npib tsib xee, thiab nce cov ntsiab lus ntawm lwm cov ntsiab lus xws li carbon.Qhov tshwm sim ntawm cov khoom sib xyaw ua ke tsis tsuas yog txo qhov zoo ntawm cov khoom, piv txwv li, thaum cov ntsiab lus ntawm chromium nyob rau hauv 304 stainless hlau raj tsis txaus, nws tsis tsuas yog cuam tshuam rau corrosion kuj thiab formability ntawm cov khoom, tab sis kuj. muaj peev xwm muaj peev xwm thaum siv hauv kev lag luam tshuaj, khoom siv thiab kev lag luam tsim khoom.Nyob rau tib lub sijhawm, nws kuj cuam tshuam rau cov tsos thiab antioxidant zog ntawm cov khoom.
3 、 Cov laj thawj cuav: Qhov no kuj yog ib qho laj thawj tshaj plaws rau cov khoom oxidation uas qee cov neeg siv khoom ntsib thaum siv cov khoom siv hlau stainless.Qee cov neeg siv khoom ua haujlwm tsis raug cai hauv kev siv cov khoom siv thiab kev saib xyuas, tshwj xeeb tshaj yog qee qhov stainless hlau yeeb nkab khoom siv hauv kev lag luam khoom noj khoom haus tshuaj.Qhov tshwm sim ntawm oxidation yog siab.Rau cov txiv neej ua oxidation ntawm cov khoom hlau, nws yog ib qho tsim nyog yuav tsum muaj kev paub siv cov khoom siv thiab kev tu thiab tu kom zoo, kom txo tau cov oxidation los ntawm kev siv tsis raug.
Stainless hlau cia siab rau ntawm nyias nyias, ruaj, zoo thiab ruaj khov chromium-nplua nuj oxide zaj duab xis (tiv thaiv zaj duab xis) tsim rau ntawm nws qhov chaw los tiv thaiv qhov nruam infiltration thiab oxidation ntawm oxygen atoms kom tau txais lub peev xwm los tiv thaiv xeb.Ib zaug yog vim li cas, cov yeeb yaj kiab no tsis tu ncua, oxygen atoms hauv huab cua lossis kua yuav nkag mus ntxiv lossis cov hlau atoms hauv cov hlau yuav txuas ntxiv mus, tsim cov hlau oxide xoob, thiab cov hlau saum npoo yuav txuas ntxiv corroded.Muaj ntau hom kev puas tsuaj rau zaj duab xis saum npoo, feem ntau hauv lub neej niaj hnub yog cov hauv qab no:
1. Nyob rau saum npoo ntawm stainless hlau, hmoov av uas muaj lwm yam hlau hais los yog attachments ntawm heterogeneous hlau hais.Nyob rau hauv huab cua ntub, cov dej condensed nruab nrab ntawm cov ntawv txuas thiab cov hlau tsis muaj steel txuas ob mus rau hauv cov roj teeb micro, uas ua rau cov tshuaj tiv thaiv electrochemical thiab tiv thaiv cov hlau tsis huv.Cov zaj duab xis puas lawm, uas yog hu ua electrochemical corrosion.
2. Qhov saum npoo ntawm stainless hlau ua raws li cov kua txiv hmab txiv ntoo (xws li zaub, noodle kua zaub, thiab lwm yam), thiab nyob rau hauv lub xub ntiag ntawm dej thiab oxygen, organic acids yog tsim, thiab cov organic acids yuav corrode hlau nto rau lub sij hawm ntev.
3. Qhov saum npoo ntawm stainless hlau adheres muaj cov kua qaub, alkalis thiab ntsev (xws li dej alkali thiab txiv qaub dej txaws los ntawm cov phab ntsa kho kom zoo nkauj), ua rau lub zos corrosion.
4. Nyob rau hauv cov huab cua tsis zoo (xws li cov huab cua uas muaj ntau cov sulfide, carbon oxide, nitrogen oxide), thaum ntsib cov dej condensed, nws tsim cov kua me me ntawm sulfuric acid, nitric acid thiab acetic acid, ua rau cov tshuaj corrosion.
Cov xwm txheej saum toj no tuaj yeem ua rau kev puas tsuaj rau cov yeeb yaj kiab tiv thaiv ntawm cov hlau tsis huv thiab ua rau xeb.Yog li ntawd, txhawm rau xyuas kom meej tias cov hlau nto yog qhov ci ntsa iab thiab tsis xeb, peb pom zoo:
1. Qhov saum npoo ntawm cov khoom siv stainless hlau yuav tsum tau muab ntxuav thiab txhuam tsis tu ncua kom tshem tawm cov ntawv txuas thiab tshem tawm cov khoom siv sab nraud uas ua rau kev hloov kho;
2. Khaws ib puag ncig kom qhuav;
3. Cov tshuaj muaj pes tsawg leeg ntawm qee cov kav hlau stainless ntawm lub khw tsis tuaj yeem ua tau raws li cov qauv hauv tebchaws thiab tsis tuaj yeem ua tau raws li cov khoom siv.Yog li ntawd, nws tseem yuav ua rau xeb, uas yuav tsum tau ua tib zoo xaiv cov khoom los ntawm cov tuam txhab muaj npe nrov.
Stainless hlau muaj peev xwm tiv taus atmospheric oxidation - uas yog, xeb kuj, thiab nws kuj muaj peev xwm corrode nyob rau hauv xov xwm uas muaj acids, alkalis, thiab ntsev - uas yog, corrosion kuj.Txawm li cas los xij, qhov loj ntawm nws lub peev xwm los tiv thaiv corrosion nws txawv nrog cov tshuaj muaj pes tsawg leeg ntawm nws cov hlau nws tus kheej, lub xeev ntawm kev sib nrig sib ntxiv, cov xwm txheej ntawm kev siv thiab hom kev tshaj tawm ib puag ncig.Piv txwv li, 304 steel yeeb nkab muaj peev xwm tiv thaiv corrosion zoo heev nyob rau hauv qhov chaw qhuav thiab huv si, tab sis yog tias nws tau tsiv mus rau thaj chaw ntug hiav txwv, nws yuav sai sai oxidize hauv hiav txwv pos huab uas muaj ntsev ntau, thaum 316 steel yeeb nkab ua tau zoo. .Yog li ntawd, nws tsis yog txhua yam ntawm stainless hlau uas tuaj yeem tiv taus corrosion thiab xeb hauv ib puag ncig.
Post lub sij hawm: Apr-17-2023