Qhov kev xeb ntawm kev xeb ntawm cov hlau tsis muaj zog yog vim cov dej npog nrog ib tug nyias nyias (li 1 nm) ntim zaj duab xis. Qhov yeeb yaj kiab 1n yog corrosive rau cov xov xwm thiab yog qhov yooj yim teeb meem rau kev tiv thaiv steel tsis huv. Passivation ntawm stainless hlau muaj dynamic feature thiab shouldn 't tau pom li nres nres ntawm corrosion, tab sis theej li barrier rau diffusion, uas zoo heev txo tus nqi ntawm anode cov tshuaj tiv thaiv. Cov yeeb yaj kiab tau muab pov tseg nyob rau hauv lub xub ntiag ntawm ib tus neeg txo kev qis (xws li, chloride ion) thiab muab khaws cia tau los yog kho thaum muaj oxidizing tus neeg sawv cev (xws li cua).
Stainless hlau qhov chaw tso rau hauv cov huab cua yuav tsim ib zaj duab xis oxide, tab sis kev tiv thaiv ntawm zaj yeeb yaj kiab no tsis yog zoo meej. Nws yog feem ntau tsim nyog rau kev ua kom huv si, xws li alkali ntxuav thiab pickling, thiab passivation nrog ib tus neeg sawv cev oxidizing kom ntseeg tau tias muaj kev ruaj ntseg thiab ruaj khov ntawm zaj dab neeg kos duab. Ib qho ntawm cov hom phiaj ntawm pickling yog los tsim cov dejnum zoo rau kev sau thiab kom paub meej ntawm tsim ntawm ib tug zoo kos duab. Vim hais tias qhov chaw ntawm cov hlau tsis muaj hlau tsis zoo ntawm qhov nruab nrab 10 μm tuab yog etched deb ntawm pickling, cov tshuaj lom neeg ua si ntawm cov kua qaub los ua rau qhov kev sib tawg ntawm qhov chaw ntxeev siab kom siab tshaj qhov ntawm lwm qhov chaw hauv qhov chaw. Yog li ntawd, lub pickling ua rau tag nrho saum npoo mus ua ke tusyees. Cov kab mob plhaws raug tshem tawm. Tab sis feem ntau tseem ceeb, dhau ntawm kev sau npe los ntawm pickling, oxides ntawm hlau thiab hlau yog feem xyuam raug piv rau cov oxides ntawm chromium thiab chromium, thiab cov txheej chromium depleted yog tawm, uas ua rau cov kev ua zoo ntawm chromium rau ntawm cov hlau tsis muaj stainless. Qhov no chromium nplua nuj tso cai zaj duab xis Tus peev xwm yog txog li 1.0V (SCE), uas yog nyob ze ntawm noble hlau lub peev xwm thiab pab txoj kev txhim kho corrosion. Cov kev kho cov kabmob sib txawv tuaj yeem cuam tshuam txog kev sau thiab cov qauv ntawm cov yeeb yaj kiab, thiab ua li no cuam tshuam rau cov khoom tsis muaj zog. Piv txwv, cov kev hloov kho electrochemical kho tau ua tus tso cai zaj dab neeg muaj ib txheej txheem multilayer, sib sau CrO3 los yog Cr2O3 nyob hauv txheej txheej, los yog kev tsim muaj lub xeev iav. Cov zaj duab xis oxide ua rau cov hlau tsis muaj hlau ntxig rau nws qhov siab tshaj plaws corrosion kuj.
Degreasing thiab Degreasing - Ntws Dej Dej Ntxhua Dej Npau - Dej ua - Dej Dej Tsaus Dej - Yav Dhau Los - Tshem Dej Dej Ntxawm - Tsis Txhob Dej - Txhob Dej Dej Ntxhua Tsiab --- Dej ntshiab heev ---- Qhuav cov khoom ntim
Cov lus piav qhia:
1. Degreasing, Yog tias koj paub tseeb tias qhov chaw ua hauj lwm tsis muaj roj ntau, koj tuaj yeem tawm ntawm cov kauj ruam no.
2. Ua kom lub sijhawm so so yog 2-5 feeb, yog tias koj paub tseeb tias cov khoom ua haujlwm nto tsis muaj xeb, qhov chaw rau khoom thiab lwm cov khoom tsis muaj paug (xws li tshiab ci ntsa tawg), cov kauj ruam no yuav raug rho tawm.
3. Kev Sau Npe yuav tsum tau ua tiav. Lub sijhawm so so yog 30 feeb, thiab ntev dua daim ntawv tso cai zaj dab neeg, qhov ntau tiav nws yog.
4. Tsis muaj kev sib cais, soaking yog 3 feeb, yog hais tias qhov saum npoo yooj yim zoo, tsis muaj ridges, tsis muaj qhov dig muag qhov muag, cov kauj ruam no yuav tshem tawm.
5. Tshaj dej ntshiab tshaj li 3 feeb.