(1) Kev cuam tshuam ntawm Dej Zoo
Yog tias cov dej siv hauv lub tank muaj cov xeb hnyav lossis muaj cov calcium thiab magnesium ions siab, nws yuav cuam tshuam rau kev ruaj ntseg ntawm kev kho qhov chaw. Thaum npaj cov tshuaj hauv lub tank, cov dej softener tuaj yeem muab ntxiv ua ntej kom txo tau qhov cuam tshuam ntawm cov dej zoo ntawm cov tshuaj kho qhov chaw.
(2) Lub sijhawm siv
Feem ntau, cov tshuaj kho deg siv cov ntsev colloidal titanium ntsev, uas muaj cov haujlwm colloidal. Thaum lub sij hawm siv ntev los yog cov tshuaj muaj ntau impurity ions, cov kev ua ntawm colloidal yuav ploj. Thaum lub sijhawm no, lub colloid lub xeev ruaj khov raug puas tsuaj, lub tank tov precipitates thiab txheej, tsim flocculent tsos. Thaum lub sij hawm no, lub tank tov yuav tsum tau hloov.
Phosphating txheej txheem
Cov txheej txheem phosphating yog tshuaj lom neeg thiab electrochemical cov tshuaj tiv thaiv uas tsim cov tshuaj phosphate chemical conversion film, thiab tsim cov tshuaj hloov dua siab tshiab yog hu ua phosphating txheej txheem zaj duab xis. Hauv kev pleev xim tsheb npav, cov tshuaj uas siv ntau yog qis -kub zinc-raws li phosphating kua. Lub hom phiaj tseem ceeb ntawm cov txheej txheem phosphating yog los muab kev tiv thaiv rau lub hauv paus ntawm cov khoom siv aluminium thiab rau qee qhov kev tiv thaiv cov txhuas los ntawm kev corroded; nws yog siv los ua primer ua ntej pleev xim los txhim kho qhov adhesion thiab corrosion kuj ntawm cov xim zaj duab xis. Cov txheej txheem phosphating yog ib feem tseem ceeb ntawm tag nrho cov txheej txheem pretreatment. Nws cov tshuaj tiv thaiv mechanism yog qhov nyuaj thiab muaj ntau yam cuam tshuam; Yog li ntawd, cov txheej txheem tswj cov tshuaj phosphating da dej yog qhov nyuaj dua piv rau lwm cov tshuaj da dej.
(1) Acid Ratio
Ua kom cov kua qaub sib piv tuaj yeem ua kom nrawm nrawm ntawm cov txheej txheem phosphating, ua rau cov txheej txheem phosphating zaj duab xis nyias thiab muag heev. Txawm li cas los xij, yog tias cov kua qaub sib piv siab dhau lawm, cov zaj duab xis txheej yuav nyias dhau, yooj yim ua rau cov phosphate workpiece khaws cov residue; Yog tias cov kua qaub qis dhau lawm, cov txheej txheem phosphating cov tshuaj tiv thaiv yuav qeeb, cov phosphating crystals yuav ntxhib thiab ntxeem tau, corrosion kuj yuav qis, thiab phosphating workpiece yuav yooj yim tsim daj xeb. Feem ntau hais lus, qhov yuav tsum tau muaj cov kua qaub sib txawv nyob ntawm qhov kev daws teeb meem phosphating lossis mis.
(2) Kub
Kev ua kom zoo ntawm chav da dej tuaj yeem ua kom cov yeeb yaj kiab ua kom nrawm, tab sis yog tias qhov kub thiab txias siab dhau lawm, nws yuav cuam tshuam rau kev hloov pauv hauv cov kua qaub, yog li cuam tshuam rau kev ruaj ntseg ntawm da dej. Nyob rau tib lub sijhawm, zaj duab xis nuclei ua ntxhib, thiab cov sludge los ntawm da dej nce ntxiv.
(3) Tus nqi sediment
Raws li cov txheej txheem phosphating txuas ntxiv, cov sediment hauv cov kua tank yuav maj mam nce. Cov sediment ntau dhau tuaj yeem cuam tshuam cov kev cuam tshuam ntawm qhov cuam tshuam ntawm qhov chaw ua haujlwm, ua rau cov phosphating zaj duab xis tsis sib xws, nrog cov hmoov tshauv loj heev, lossis tseem tsis tuaj yeem tsim cov yeeb yaj kiab. Yog li ntawd, lub tank kua yuav tsum tau hloov raws sij hawm raws li tus nqi ntawm workpieces ua tiav thiab lub sij hawm ntawm kev siv kom tshem tawm cov sediment thiab sludge.
(4) Nitrite NO-2
NO-2 tuaj yeem ua kom cov txheej txheem phosphating, txhim kho cov zaj duab xis ntom ntom thiab corrosion kuj. Yog tias cov ntsiab lus siab dhau lawm, zaj duab xis tuaj yeem tsim cov pob dawb lossis xim iridescence; Yog tias tsawg dhau, qhov kev tsim cov yeeb yaj kiab qeeb, thiab cov phosphating zaj duab xis yog qhov ua rau daj xeb.
(5) Sulfate Ion SO4²⁻
Yog hais tias qhov concentration ntawm cov tshuaj pickling yog siab dhau lawm los yog cov dej yaug tsis zoo tswj, nws tuaj yeem yooj yim ua rau muaj kev nce hauv sulfate ions hauv cov txheej txheem phosphating. Ntau dhau ntawm sulfate ions yuav ua rau txo qis cov tshuaj tiv thaiv ntawm cov txheej txheem phosphating, ua rau cov phosphating zaj duab xis nplej ntxhib thiab ntxeem tau, ua rau grey deposits hnyav, thiab txo cov corrosion kuj ntawm phosphating zaj duab xis.
(6) Ferrous Ion Fe²⁺
Thaum cov ferrous ions nyob rau hauv cov tshuaj phosphating siab dhau lawm, nws tuaj yeem txo qhov corrosion kuj ntawm chav tsev kub phosphating films; ua rau nruab nrab kub phosphating zaj duab xis nplej ua ntxhib, qhov chaw tig dawb - grey, thiab txo cov corrosion kuj; thiab nce sediment tsim nyob rau hauv high kub phosphating daws, ua cov tshuaj turbid thaum tseem ua rau cov dawb acidity.
