Cov phooj ywg zoo uas tau nyob hauv cov hlau tsim kev lag luam yuav tsum tau paub txog kev nqa (Nrhiav kom paub), kev nqa cov khoom tawm mus rau cov xim oxide rau qhov zoo ntawm cov khoom siv hlau, thiab tshem tawm cov oxide zaj duab xis thaum nws nyob ntawm hlau Ib phosphate zaj duab xis (daim ntawv nyias nyias thiab muag pob tshab) yog tsim rau saum npoo av. Tsis txhob poob siab rau zaj duab xis (nyias daim ntawv thiab nyias daim ntawv), uas yuav siv rau tom qab tshuaj tsuag los yog cov txheej txheem molding (guò chéng). Ib lub luag hauj lwm. Txoj kab plaub hau tsuas tsis muaj lub taub hau me me xwb, tab sis kuj muaj lub me me ntsia hlau, lub luv luv ntsia hlau ntev, thiab lub nrig me me, thiab qee qhov kev ntsuas screws yuav tsum ignored. Precision ntswj ntau lawm thiab kev tsim cov txheej txheem yuav tsum yog qhov tseeb, raws li kev cai kam rau ua, kev xav tau me me thiab lwm yam sib txawv heev. Nws yuav tsum tau hais tias xws li pickling yog zoo li muab ib tug tshiab tiab ntawm lub hlau nto, thiab nws yog ib qho tshiab tiab uas yuav tsum tau muab tso rau. Txij ntawm no pom, pickling kuj yog ib kauj ruam tseem ceeb rau peb, thiab peb yuav tsum nyob hauv qhov chaw. Peb yuav tsum tsis txhob poob ntsej muag. Cia peb kawm txog cov txheej txheem ntawm screwing thiab pickling (guò chéng).
Thawj yog kev tswj ntawm cov concentration thiab qhov kub thiab txias hauv lub pas dej. Hauv qhov no, qhov disc yog nchuav rau hauv lub pas dej peb tau npaj. Thawj kauj ruam yog tshem tawm cov oxide zaj duab xis ntawm cov hlau. Cov ntsuas tsis yog tus qauv siv cov khoom fais fab thiab kev ua zauv ntawm qhov khoom siv qhov khoom tig thiab kev sib txhuam, thiab ua raws li cov cuab yeej cuab tam. Screws yog ib lub ntsiab lus rau cov fasteners, hais txhua hnub. Cov hlau tsis txhuam pob tsuas yog feem ntau xa cov hlau uas tiv taus cov cua phem, dej, kua qaub, alkali ntsev, lossis lwm yam tawm. Raws li qhov sib txawv ntawm cov kab mob sib txawv, cov hlau tsis muaj stainless thiab cov kua qaub uas ua rau tawv nqaij yog cov nyom. Txawm hais tias muaj qee cov hlau muaj qhov tsis-rusting, lawv yuav tsis tas resistant acids, thiab cov acid-resistant steels feem ntau tsis-xeb-resistant. Qhov thib ob yog los hloov lub pas dej. Cov kauj ruam ntawm no yog hu ua dej huv. Qhov tseem ceeb muaj nuj nqi yog tshem tawm cov tshuaj ntxaug ntawm qhov chaw. Qhov thib peb oxalic acid yog kom ua rau kev ua ntawm lub hlau thiab pw lub hauv paus rau tom ntej no ncaj ncees zaj dab neeg. Cov nram no yog peb kauj ruam tseem ceeb tshaj plaws. Phosphate yuav tsum nyob rau hauv kev sib cuag nrog qhov zoo ntawm cov hlau khoom tsim ib zaj duab xis. Cov nram no yog ib kauj ruam ntawm cov dej ntshiab, kuaj xyuas cov khoom seem. Cov kauj ruam no yog qhov yooj yim, tiam sis peb yuav tsum tuav lub sijhawm zoo rau kev khiav hauj lwm thiab kev tswj hwm, hom kev tshaj lij no yuav tsum muaj tus neeg teb xov tooj kom paub zoo txog lub sij hawm, los yog pickling yog kev txiav tawm, tsis muaj qhov tseem ceeb, ces tom qab Cov kauj ruam no tsis muaj txoj hau kev los siv nws. Nws tuaj yeem hais tau tias pickling yog ib lub caij nyoog rau kev sib tw ntau lawm. Nws yuav tsum yog ib qho zoo rau peb ua tau raws li cov txheej txheem hauv qab no kom ua tau raws li cov kev xav tau zoo.