Stainless hlau yog cov hlau alloy uas muaj cov ntsiab lus chromium tsawg kawg ntawm 10.5%. Cov chromium reacts nrog cov pa oxygen hauv huab cua thiab tsim cov txheej txheem tiv thaiv uas ua rau cov hlau tsis muaj zog tiv taus corrosion thiab xeb. Tam sim no, muaj ntau tshaj 150 hom stainless hlau hauv khw.

Vim nws tsis tshua muaj txij nkawm, tsis kam mus rau oxidation thiab staining, stainless hlau yog nyiam nyob rau hauv ntau daim ntawv thov, tshwj xeeb tshaj yog cov uas zoo nkauj teeb meem.

Txawm hais tias muaj cov yam ntxwv zoo nkauj no, stainless hlau tuaj yeem thiab xeb tom qab tag nrho, nws yog 'stainless' tsis 'stainfree'. Qee yam ntawm cov hlau tsis muaj steel muaj qhov ua rau corrosion ntau dua li lwm tus, nyob ntawm cov ntsiab lus chromium. Qhov siab dua cov ntsiab lus chromium, qhov tsawg dua cov hlau yuav xeb.

Tab sis, dhau sij hawm thiab yog tias tsis tswj kom raug, xeb tuaj yeem thiab yuav txhim kho ntawm stainless hlau.

Cov yam ntxwv cuam tshuam rau xeb ntawm stainless hlau

Ntau yam tuaj yeem cuam tshuam lub peev xwm ntawm stainless hlau los tiv thaiv corrosion. Qhov sib xyaw ntawm cov hlau yog ib qho kev txhawj xeeb loj tshaj plaws thaum nws los txog rau corrosion kuj. Cov ntsiab lus hauv cov qib sib txawv ntawm cov hlau tsis muaj steel tuaj yeem muaj kev cuam tshuam tsis zoo rau corrosion kuj.

Ib puag ncig uas siv cov hlau yog lwm yam uas tuaj yeem ua kom muaj feem cuam tshuam ntawm cov hlau tsis muaj xeb. Ib puag ncig nrog cov tshuaj chlorine zoo li cov pas dej da dej yog corrosive heev. Tsis tas li ntawd, ib puag ncig nrog dej qab ntsev tuaj yeem ua kom corrosion ntawm stainless hlau.

Thaum kawg, kev saib xyuas yuav muaj kev cuam tshuam rau cov hlau muaj peev xwm tiv thaiv xeb. Cov chromium nyob rau hauv stainless hlau reacts nrog oxygen nyob rau hauv cov huab cua los tsim ib tug tiv thaiv chromium oxide txheej nyob rau saum npoo. Txawm hais tias nyias nyias, txheej txheej no yog dab tsi tiv thaiv cov hlau los ntawm corrosion. Cov txheej no tuaj yeem raug rhuav tshem los ntawm ib puag ncig hnyav lossis kev puas tsuaj xws li khawb txawm li cas los xij, yog tias ntxuav kom zoo thiab nyob rau hauv ib puag ncig tsim nyog, txheej tiv thaiv yuav rov ua dua cov khoom tiv thaiv.

Hom Stainless Hlau Corrosion

Muaj ntau hom stainless hlau corrosion. Txhua tus ntawm lawv nthuav tawm cov kev sib tw sib txawv thiab yuav tsum muaj kev sib txawv.

• General corrosion - nws yog qhov tseeb tshaj plaws thiab yooj yim los lis. Nws yog characterized los ntawm ib tug uniform poob ntawm tag nrho cov nto.
• Galvanic Corrosion - hom corrosion no cuam tshuam rau feem ntau cov hlau alloys. Nws yog hais txog ib qho xwm txheej uas ib qho hlau tuaj yeem sib cuag nrog lwm tus thiab ua rau ib qho los yog ob qho tib si rau ib leeg thiab corrode.
• Pitting corrosion - nws yog ib qho chaw hauv cheeb tsam ntawm corrosion uas tawm kab noj hniav los yog qhov. Nws muaj ntau nyob rau hauv ib puag ncig uas muaj chlorides.
• Crevice corrosion - kuj localized corrosion uas tshwm sim ntawm crevice ntawm ob qhov chaw sib koom. Nws tuaj yeem tshwm sim ntawm ob lub hlau lossis hlau thiab tsis yog hlau.

Yuav ua li cas tiv thaiv stainless hlau los ntawm xeb

Rusting stainless hlau tuaj yeem muaj kev txhawj xeeb thiab saib tsis pom. Cov hlau yog tsim los tiv thaiv corrosion uas yog vim li cas cov neeg siv feem ntau muaj kev ntshai thaum lawv pib pom cov stains thiab xeb ntawm cov hlau. Hmoov zoo, muaj ntau txoj hauv kev nyob rau theem sib txawv uas tuaj yeem pab txhim kho xeb thiab corrosion kuj.

Tsim

Kev npaj thaum lub sijhawm npaj, thaum siv cov hlau tsis muaj steel, tuaj yeem them nyiaj rau lub sijhawm ntev. Xyuas kom cov hlau siv nyob rau hauv cov cheeb tsam uas muaj dej tsawg heev kom txo tau kev puas tsuaj rau saum npoo. Nyob rau hauv rooj plaub uas tsis muaj kev sib cuag nrog dej, cov qhov dej yuav tsum tau siv. Tus qauv tsim yuav tsum tau tso cai rau cov cua dawb los tiv thaiv kev puas tsuaj rau cov hlau.

Fabrication

Thaum lub sijhawm tsim khoom, kev saib xyuas tshwj xeeb yuav tsum tau noj nyob ib puag ncig kom tsis txhob muaj kev sib kis nrog lwm cov hlau. Txhua yam ntawm cov cuab yeej, chaw cia khoom, tig yob thiab chains yuav tsum tau ua tib zoo saib xyuas kom tsis txhob poob impurities rau hauv cov hlau. Qhov no tuaj yeem ua rau muaj peev xwm tsim cov xeb.

Kev tu

Thaum cov hlau raug ntsia, kev saib xyuas tsis tu ncua yog qhov tseem ceeb hauv kev tiv thaiv xeb, tseem txwv qhov kev loj hlob ntawm cov xeb uas yuav tau tsim. Tshem tawm cov xeb uas siv cov khoom siv los yog tshuaj lom neeg thiab ntxuav cov hlau nrog dej sov thiab xab npum. Koj yuav tsum tau npog cov hlau nrog cov xeb-resistant txheej.