Vim li cas stainless hlau xeb?
Thaum cov xim av xeb (spots) tshwm rau saum npoo ntawm cov kav hlau stainless, tib neeg xav tsis thoob: lawv xav tias, "Stainless hlau tsis xeb, thiab yog tias nws xeb, nws tsis yog stainless hlau." Qhov no yog ib qho kev pom thiab tsis ncaj ncees ntawm stainless hlau uas tsis muaj kev nkag siab. Stainless hlau kuj yuav xeb nyob rau hauv tej yam kev mob.
Stainless hlau tuaj yeem tiv taus atmospheric oxidation - uas yog, stainlessness - thiab tuaj yeem corrode hauv xov xwm uas muaj cov kua qaub, alkalis, thiab ntsev - uas yog, corrosion kuj. Txawm li cas los xij, qhov loj ntawm nws cov corrosion kuj txawv nrog cov tshuaj muaj pes tsawg leeg ntawm cov hlau nws tus kheej, lub xeev ntawm annealing, cov kev mob ntawm kev siv, thiab hom ntawm ib puag ncig xov xwm. Piv txwv li, 304 steel kav dej muaj qhov zoo tshaj plaws corrosion kuj nyob rau hauv qhuav thiab huv huab cua, tab sis yog hais tias lawv tau tsiv mus rau cov ntug hiav txwv dej, lawv yuav sai sai xeb nyob rau hauv hiav txwv pos huab uas muaj ntsev ntau, thaum 316 steel kav ua tau zoo. Yog li ntawd, tsis yog txhua yam ntawm stainless hlau tuaj yeem tiv taus corrosion thiab xeb hauv ib puag ncig.
Muaj ntau hom kev puas tsuaj ntawm zaj duab xis saum npoo, thiab cov hauv qab no feem ntau tshwm sim hauv lub neej txhua hnub:
Stainless hlau cia siab rau qhov tsis yooj yim, muaj zog, ua kom zoo thiab ruaj khov chromium-nplua nuj oxide zaj duab xis (tiv thaiv zaj duab xis) tsim los ntawm nws qhov chaw los tiv thaiv kev nkag mus ntxiv thiab oxidation ntawm oxygen atoms, yog li tau txais lub peev xwm los tiv thaiv xeb. Thaum cov yeeb yaj kiab no tsis tu ncua vim qee qhov laj thawj, oxygen atoms hauv huab cua lossis kua yuav nkag mus ntxiv, lossis cov hlau atoms hauv cov hlau yuav txuas ntxiv mus, sib sau cov hlau oxide xoob, thiab cov hlau yuav txuas ntxiv mus. Muaj ntau hom kev puas tsuaj ntawm zaj duab xis saum npoo, thiab cov hauv qab no feem ntau tshwm sim hauv lub neej txhua hnub:
1. Lub nto ntawm stainless hlau accumulates plua plav uas muaj lwm yam hlau hais los yog txawv teb chaws hlau hais. Nyob rau hauv cov huab cua ntub, cov dej condensed nruab nrab ntawm cov ntawv txuas thiab cov hlau tsis muaj hlau txuas ob mus rau hauv cov roj teeb micro, ua rau cov tshuaj tiv thaiv electrochemical, thiab cov yeeb yaj kiab tiv thaiv puas, hu ua electrochemical corrosion.
2. Organic kua txiv (xws li zaub, noodle kua zaub, hnoos qeev, thiab lwm yam) adheres rau saum npoo ntawm stainless hlau. Nyob rau hauv dej thiab oxygen, nws tsim cov organic acid, uas erodes lub hlau nto rau lub sij hawm ntev.
3. Cov kua qaub, alkali, thiab ntsev (xws li cov dej alkaline thiab cov txiv qaub dej txaws los ntawm cov phab ntsa kho kom zoo nkauj) ua raws li cov hlau tsis huv, ua rau lub zos corrosion.
4. Nyob rau hauv cov huab cua phem (xws li ib qho chaw uas muaj cov sulfide ntau, carbon oxide, thiab nitrogen oxide), condensed water forms sulfuric acid, nitric acid, thiab acetic acid me ntsis, ua rau cov tshuaj corrosion.
1. Txoj kev ntxuav
Thaum ntxuav cov hlau tsis huv, yuav tsum tau saib xyuas kom tsis txhob khawb nws, thiab tsis txhob siv cov tshuaj ntxuav tes, cov pob steel, cov cuab yeej sib tsoo, thiab lwm yam, uas muaj cov khoom siv tshuaj dawb thiab cov abrasives. Txhawm rau tshem tawm cov tshuaj ntxuav tes, yaug qhov chaw nrog dej huv thaum kawg ntawm kev ntxuav.
2. Yuav ua li cas nrog plua plav
Qhov saum npoo ntawm cov hlau tsis muaj plua plav thiab yooj yim tshem tawm cov av tuaj yeem ntxuav nrog dej huv lossis xab npum thiab cov tshuaj detergent tsis muaj zog. Rau cov khoom nplaum, siv cawv lossis cov kuab tshuaj organic (ether, benzene) los txhuam.
3. Roj
Cov roj thiab lubricating roj muaj kuab paug nyob rau saum npoo ntawm stainless hlau yuav tsum tau muab ntxuav nrog ib daim ntaub mos mos thiab ces ntxuav nrog tsis muaj tshuaj detergent, ammonia tov, los yog tshwj xeeb detergent.
4. Adherent xeb
Cov xeb uas tshwm sim los ntawm cov av ntawm cov hlau tsis huv tuaj yeem raug tshem tawm nrog cov tshuaj tiv thaiv kab mob zoo tib yam hauv khw thiab ntxuav nrog dej huv lossis tsis muaj zog alkaline soapy dej.