Vim li cas stainless hlau kuj xav tau passivation?

Dab tsi thiab Vim li cas stainless hlau kuj xav tau passivation?

Passivation yog cov tshuaj kho mob uas siv cov kua qaub tshwj xeeb kom tshem tawm cov hlau dawb thiab lwm yam kab mob ntawm cov hlau tsis huv thaum txhawb kev tsim cov chromium oxide / npib tsib xee oxide los tiv thaiv corrosion ntxiv ntawm stainless hlau. Passivation yog qhov txuas tseem ceeb hauv qib stainless hlau ntau lawm. Daim phiaj xwm kev pov hwm zoo yuav tsum tau ua kom zoo thiab ntau qib stainless hlau yuav tsum raug tshuaj xyuas raws li. Passivation pib tam sim ntawd tom qab tshem tawm cov impurities saum npoo.

Nws yog qhov kev pom zoo tias cov txheej txheem oxide passive ntawm stainless hlau tuaj yeem tiv taus ntau yam khoom siv, kev lag luam thiab ib puag ncig kev puas tsuaj. Yog li ntawd, kev kho mob passivation yog suav tias yog ib kauj ruam tseem ceeb hauv kev tsim cov khoom stainless hlau.

Vim li cas stainless hlau kuj xav tau passivation?

Dab tsi ua rau stainless hlau txawv ntawm carbon hlau yog nws cov ntsiab lus chromium. Cov hlau tsis muaj kev tiv thaiv yuav xeb thaum raug huab cua thiab ya raws. Qhov no hlau oxide zaj duab xis (xeb) yog "active" thiab yuav tsim ntau thiab ntau hlau oxide kom ceev corrosion. Stainless hlau muaj cov chromium txaus los ua ib qho inert chromium oxide zaj duab xis ntawm nws qhov chaw kom ua rau passivation. Txawm li cas los xij, passivation tsuas yog tshwm sim nyob rau hauv cov ntsiab lus chromium txaus thiab muaj cov pa oxygen. Yuav kom ua tiav passivation, corrosive cov kab mob xws li cov hlau dawb ntawm cov hlau stainless yuav tsum tau muab tshem tawm. Ua li no, chromium tuaj yeem hnov ​​​​mob nrog oxygen hauv huab cua los ua ib qho inert lossis passivated chromium oxide zaj duab xis nyob rau saum npoo ntawm cov hlau tsis huv. Cov txheej nyias nyias ntawm chromium oxide dhau los ua ib qho teeb meem uas cais cov ferrous alloy los ntawm huab cua puag ncig.

GNEE Steel Group yog Tuam Tshoj tus kws tshaj lij ib-nres muab cov saw hlau lag luam rau cov khoom siv hlau. Nws cov yeeb nkab stainless hlau ntau lawm tshuab tau mus txog lub ntiaj teb cov txheej txheem nruab nrab. Nws tau raug lees paub los ntawm ntau lub tuam txhab ua haujlwm thiab tau dhau los ua lub hnub qub lag luam hauv Asia. Yog xav paub ntxiv txog cov khoom siv stainless hlau, xaiv GNEE Steel.