Stainless hlau tau raug suav tias yog cov khoom zoo tshaj plaws tiv thaiv corrosion. Nws tau tso siab rau nws cov kav ntev thiab "xeb-dawb" lub koob npe nrov. Tab sis ntawm no yog qhov tseeb uas surprises ntau.
Puas yog stainless hlau xeb?
Stainless hlau paub txog nws zoo heev tiv thaiv corrosion, tab sis qhov ntawd tsis txhais hais tias nws yog xeb kiag li - pov thawj. Txawm hais tias nws ua tau zoo dua li cov hlau tsis tu ncua, stainless hlau tseem tuaj yeem xeb qee zaum.
Dab tsi ua Stainless Hlau "Stainless"?
Lub corrosion kuj ntawm stainless hlau yog vim muaj tsawg kawg yog 10.5-12% chromium, uas reacts nrog oxygen nyob rau hauv cov huab cua los ua ib tug nyias, tsis pom, thiab nws tus kheej- kho chromium oxide (Cr₂O₃) zaj duab xis. Cov txheej txheem passive no ua raws li kev tiv thaiv ntawm cov hlau thiab nws ib puag ncig. Yog tias cov yeeb yaj kiab tiv thaiv no raug cuam tshuam, thiab cov xwm txheej zoo, xeb tseem tuaj yeem tsim.
Hauv kev ua lag luam, muaj ntau qib stainless hlau, xws li austenitic, ferritic, martensitic, duplex, thiab nag lossis daus- hom tawv tawv, txhua qhov sib txawv ntawm qhov sib txawv. Txawm li cas los xij, tsis muaj steel hlau tsis muaj zog tiv thaiv corrosion.
1. Cov khoom siv hauv qab no Standard
Tsis yog tag nrho stainless hlau yog tsim sib npaug. Qee qhov qis- tus nqi qis lossis cov khoom siv tsis zoo stainless hlau yuav tsis ua raws li cov qauv thoob ntiaj teb. Piv txwv li, yog tias cov ntsiab lus chromium poob qis dua qhov pib, lossis yog tias cov khoom tseem ceeb xws li npib tsib xee lossis molybdenum tsis muaj, cov txheej tiv thaiv oxide yuav tsis txaus, ua rau cov hlau tsis muaj zog.
Xyuas kom koj yuav cov hlau tsis muaj steel los ntawm cov chaw muag khoom muaj npe, tshwj xeeb tshaj yog siv rau hauv qhov chaw hnyav.
2. Chloride Attack los ntawm ntsev los yog tshuaj
Chloride ions (Cl⁻) yog cov yeeb ncuab tseem ceeb ntawm stainless hlau. Pom muaj nyob rau hauv cov tshuaj tsuag dej hiav txwv, de- cov ntsev ntsev, thiab txawm tias qee cov tshuaj ntxuav hauv tsev, cov tshuaj chlorides tuaj yeem nkag mus rau hauv cov txheej txheem passive thiab ua rau pitting corrosion, uas pib raws li qhov me me ntawm qhov chaw thiab sib sib zog nqus mus rau lub sijhawm.
Hom kev txhim kho hauv cheeb tsam no yog qhov txaus ntshai tshwj xeeb vim nws feem ntau mus tsis pom txog thaum muaj kev puas tsuaj loj. Yog tias koj daim ntawv thov muaj ntsev lossis tshuaj chlorine- thaj chaw nplua nuj, xav txog kev siv 316 lossis siab dua- qib stainless hlau, uas suav nrog molybdenum rau kev tiv thaiv ntxiv.
3. Thaum tshav kub kub-Induced Sensitization
Thaum cov hlau tsis muaj hlau raug kub ntawm 427-816℃(800-1500℃F), xws li thaum vuam lossis kev kho cua sov, chromium carbides tuaj yeem tsim raws li cov ciam teb, cov txheej txheem hu ua sensitization. Qhov no ua rau cov cheeb tsam hauv cheeb tsam poob chromium, tiv thaiv kev tsim ntawm cov txheej txheem oxide tiv thaiv thiab ua rau cov khoom siv cuam tshuam rau intergranular corrosion.
4. Ntos paug los yog kev puas tsuaj rau cov tshuab
Txawm tias siab - qib stainless hlau tuaj yeem xeb yog tias qhov chaw muaj kab mob los yog lub cev puas lawm:
Hlau hais los ntawm cov cuab yeej lossis kev sib tsoo tuaj yeem nkag mus rau hauv qhov chaw thiab xeb, ua rau "tshuaj yej staining"; Kos, vuam spatter, lossis puas tuaj yeem rhuav tshem cov yeeb yaj kiab tiv thaiv; Cov roj, roj, lossis cov ntiv tes tuaj yeem thaiv cov pa oxygen, tiv thaiv tus kheej -passivation; Plua plav thiab khib nyiab tuaj yeem cuam tshuam cov dej noo thiab corrosive
5. Kev ntxhov siab Corrosion tawg
Nyob rau hauv ib puag ncig nrog tensile kev nyuaj siab thiab muaj cov chloride ions los yog kub kub, stainless hlau yuav muaj kev ntxhov siab corrosion cracking. Daim ntawv no ntawm corrosion ua rau tsim cov kab nrib pleb, xws li raws li ib thaj tsam ntawm cov nplej los yog ncaj qha los ntawm cov nplej.
Qhov no tshwj xeeb tshaj yog hais txog kev siv cov qauv siv los yog siab -cov khoom siv bearing.
Yuav ua li cas yog tias koj cov hlau tsis xeb xeb
Yog tias xeb tshwm rau ntawm qhov chaw stainless hlau, tsis txhob txhawj. Nov yog yuav ua li cas teb tau zoo:
- Ntxuav Qhov Nto: Siv cov tshuaj tsis yog- cov tshuaj ntxuav tes tsis huv los yog sib tov ntawm cov dej qab zib thiab dej. Tsis txhob siv cov ntaub plaub los yog txhuam hniav uas yuav ua rau muaj kab mob ntxiv.
- Tshem tawm cov kab xeb: Rau lub teeb xeb, cov ntaub nplaum zoo nrog cov kua qaub los yog cov tshuaj txhuam hniav tuaj yeem ua haujlwm. Rau kev sib sib zog nqus pitting, mechanical polishing lossis pickling tej zaum yuav tsim nyog.
- Re-passivate Qhov Nto: Tom qab ntxuav, siv cov tshuaj nitric acid lossis citric acid kom rov ua dua -tsim txheej chromium oxide. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov kev lag luam.
- Tiv thaiv yav tom ntej Rusting: Kev saib xyuas tsis tu ncua, tiv thaiv cov txheej txheem, thiab xaiv cov qib stainless hlau zoo rau koj ib puag ncig tuaj yeem ua kom ntev kev pab cuam lub neej.
Stainless hlau yog zoo kawg nkaus resilient -tab sis tsis invincible. Nkag siab vim li cas nws xeb, paub yuav ua li cas pom cov cim ntxov ntawm corrosion, thiab ua cov kauj ruam tiv thaiv yuav pab koj ua kom lub neej ntev tshaj ntawm koj cov khoom siv stainless. MACSENSOR muaj kev yuav khoom nruj heev thiab cov txheej txheem tshuaj xyuas tuaj, ua kom cov khoom xa tuaj rau peb cov neeg siv khoom muaj txiaj ntsig zoo, corrosion- tiv taus, thiab tsim kom muaj kev ntseeg siab txawm tias nyob hauv ib puag ncig hnyav.
Xav pab xaiv qhov zoo stainless hlau rau kojsensorslos yogflowmeters? Hu rau peb pab neeg ntawm cov kws tshaj lij cov ntaub ntawv hnub no. Peb nyob ntawm no los pab.