Kev npaj tshuaj deg ua ntej hmoov txheej
Kev npaj tshuaj lom neeg
Daim ntawv thov tshwj xeeb muaj feem cuam tshuam nrog qhov xwm txheej ntawm qhov chaw raug ntxuav thiab qhov xwm txheej ntawm kev sib kis. Feem ntau qhov chaw hmoov coated tom qab ntxuav yog galvanized steel, steel, los yog txhuas. Txij li tsis yog txhua yam kev npaj tshuaj lom neeg muaj feem xyuam rau tag nrho cov ntaub ntawv no, cov txheej txheem npaj tau xaiv nyob ntawm cov khoom siv substrate. Rau txhua yam khoom siv, hom kev tu yuav raug tham thiab nws cov yam ntxwv tshwj xeeb rau lub substrate yuav raug piav qhia. Cov txheej txheem thov tshwj xeeb yog qhov zoo sib xws rau txhua yam khoom siv.
TIV THAIV GALVANIZED STEEL
Alkaline Tshuaj ntxuav
Alkaline cleaners rau galvanized steel feem ntau muaj ib tug sib tov ntawm me ntsis alkaline ntsev uas tsis ua puas lub zinc nto. Qee zaum, me me-rau-nruab nrab ntawm cov dawb caustic soda tej zaum yuav muaj nyob rau hauv lub tshuab ntxhua khaub ncaws kom tshem tawm cov av nyuaj los yog muab qhov xav tau etch. Cov tshuaj ntxuav no tuaj yeem siv tau los ntawm lub zog tshuaj tsuag, tso rau hauv, electrocleaning, lossis tes so.
Nyob rau hauv txoj kev tshuaj tsuag fais fab, cov khoom yuav tsum tau ntxuav yog muab tshem tawm nyob rau hauv ib qhov av thaum lub sij hawm ntxuav yog pumped los ntawm ib tug tuav tank thiab sprayed, nyob rau hauv siab, mus rau qhov chaw. Cov tshuaj ntxuav ces yog tas li recirculated. Txau siab yog li ntawm 4 mus rau 40 psi.
Nyob rau hauv txoj kev immersion, qhov chaw yuav tsum tau ntxuav yog tsuas yog immersed nyob rau hauv ib tug tov ntawm lub nqus tsev vacuum muaj nyob rau hauv ib tug me me steel los yog stainless hlau tank.
Electrocleaning yog ib qho tshwj xeeb version ntawm immersion tu nyob rau hauv uas ib tug ncaj tam tam sim no tau dhau los ntawm cov tshuaj. Cov khoom yuav tsum tau ntxuav yog dai rau hauv cov tshuaj thiab yog cov anode, thaum lwm yam electrodes ua raws li cathode. Electrocleaning muaj txiaj ntsig zoo dua li kev tso rau hauv lub tiaj tiaj vim qhov kev ua haujlwm ntawm cov pa npuas ua rau ntawm qhov chaw.
Txoj kev siv tes so ntawm daim ntawv thov tau txais txiaj ntsig ntxiv los ntawm kev ua lub cev ntawm kev tshem tawm cov av ntawm qhov chaw los ntawm kev siv daim ntaub los yog daim txhuam cev, nrog rau cov tshuaj ntxuav kom solubilize cov av.
Cov tshuaj ntxuav alkaline feem ntau yog siv rau galvanized zinc nto hauv ob theem-theem tu thiab theem dej yaug. Cov khoom uas yuav tsum tau ntxuav yog feem ntau yog xa los ntawm ib theem mus rau lwm qhov tom qab tsim nyog los tsim kev ntxuav. Ntxiv cov theem ntawm kev ntxuav thiab yaug tuaj yeem siv yog tias xav tau. Cov tshuaj nyob rau hauv da dej rau hom no feem ntau yog khaws cia ntawm qhov kub ntawm 80 thiab 200 ° F (27 thiab 93 ° C). Feem ntau qhov kub yog 120 txog 150 ° F (49 txog 66 ° C) rau cov tshuaj tsuag thiab 150 ° F (66 ° C) rau immersion. Lub sijhawm uas cov khoom raug rau cov tshuaj no yog nyob nruab nrab ntawm 30 vib nas this thiab 5+ feeb. Generally, nws yog 1 mus rau 2 feeb rau tshuaj tsuag thiab 2 mus rau 5 feeb rau immersion. Yuav kom ua tau zoo, qhov concentration ntawm cov tshuaj ntxuav alkaline yuav tsum nyob nruab nrab ntawm 1/4 thiab 16 odgal (2 txog 120 g / L). Feem ntau, nyob rau hauv cov tshuaj tsuag qhov concentration yog 1/2 rau 1 odgal (4 mus rau 8 g / L) thiab rau immersion 6 mus rau 12 odgal (45 mus rau 90 g / L).
Qhov kim tshaj plaws ntawm cov hom no yog cov electrocleaner, vim yog siv cov da dej ntau dua thiab cov nqi hluav taws xob rau cov electrocleaner. Qhov tsawg tshaj plaws yog cov tshuaj ntxuav tes, nrog rau tes so qhov chaw ntawm nruab nrab. Hom alkaline yog, nyob deb, qhov zoo tshaj plaws thiab feem ntau yog qhov tsawg tshaj plaws rau kev khiav lag luam. Txhawm rau txo qis kev ua haujlwm, cov txheej txheem ntawm daim ntawv thov yuav generally raug ntsuas raws li: electrocleaning, tshuaj tsuag tu, immersion tu, thiab tes so.
Acid Cleaners
Cov tshuaj ntxuav kua qaub tsis nquag siv los ntxuav cov hlau galvanized. Ntawm cov tshuaj ntxuav cov kua qaub uas siv, feem ntau hom yuav yog me ntsis acidic ntsev, tsis dhau corrosive rau zinc nto. Nws yuav tsum raug sau tseg, txawm li cas los xij, muaj cov tshuaj ntxuav tshwj xeeb uas tsim los tshem tawm cov khoom xeb dawb los ntawm cov khoom siv galvanized.
Nyob rau hauv txoj kev siv tshuaj tsuag fais fab, cov khoom yuav tsum tau ntxuav yog muab tshem tawm nyob rau hauv ib lub qhov dej thaum cov tshuaj ntxuav yog pumped los ntawm lub tank tuav thiab sprayed nyob rau hauv siab mus rau qhov chaw. Cov tshuaj ntxuav ces yog ntws rov qab rau hauv lub tank tuav thiab lub voj voog rov ua dua. Kev tso dej, txau, thiab tso dej ua haujlwm ua haujlwm ib txhij thiab tsis tu ncua.
Thaum siv txoj kev immersion ntawm daim ntawv thov, cov khoom yuav tsum tau ntxuav yog tsuas yog raus rau hauv ib tug tov ntawm cov tshuaj ntxuav tais diav uas muaj nyob rau hauv ib tug me me hlau los yog stainless hlau tank.
Electrocleaning nrog cov kua qaub ntxuav yog ib qho tshwj xeeb version ntawm immersion tu nyob rau hauv uas ib tug ncaj tam sim no tau dhau los ntawm cov tshuaj. Cov khoom yuav tsum tau ntxuav feem ntau yog cov anode, thaum lwm yam electrodes ua raws li cathode. Electrocleaning feem ntau ua rau lub ntsej muag huv dua li qhov yooj yim immersion vim yog kev txhuam ntawm cov pa npuas tawm ntawm qhov chaw. Cov pa oxygen yog tshwm sim los ntawm electrolysis ntawm dej.
Txoj kev siv tes so tau txais txiaj ntsig ntxiv los ntawm kev pab txhua yam ntawm lub cev txav cov av los ntawm qhov chaw los ntawm kev siv daim ntaub los yog daim txhuam cev nrog cov tshuaj ntxuav kom solubilize cov av.
Cov tshuaj ntxuav kua qaub feem ntau yog siv rau galvanized zinc nto nyob rau hauv ob theem: lub sij hawm tu thiab dej yaug. Ntxiv cov theem, ntxuav thiab yaug, siv tau yog tias xav tau. Cov tshuaj nyob rau hauv da dej yog khaws cia ntawm qhov kub ntawm 80 txog 200 ° F (27 txog 93 ° C); feem ntau 100 txog 140 ° F (38 txog 60 ° C) rau cov tshuaj tsuag thiab 140 txog 180 ° F (60 txog 82 ° F) C) rau immersion. Cov khoom raug raug rau cov tshuaj cals rau 30 vib nas this mus rau 5+ feeb; Feem ntau 1 mus rau 2 feeb rau tshuaj tsuag thiab 2 mus rau 5 feeb rau immersion. Cov tshuaj tau khaws cia ntawm qhov concentration ntawm 1/4 txog 16 odgal (2 txog 120 gL); Feem ntau 1/2 mus rau 1 odgal (4 mus rau 8 gL) rau tshuaj tsuag thiab 4 mus rau 12 odgal (30 mus rau 90 g / L) rau immersion.
Txhawm rau txo qis kev ua haujlwm, cov txheej txheem ntawm daim ntawv thov yuav generally raug ntsuas raws li: electrocleaning, tshuaj ntxuav, immersion tu, thiab ntxuav tes.
Neutral Cov tshuaj ntxuav tsev
Ib neutral Cov tshuaj ntxuav tes (raws li siv rau cov hlau galvanized) tuaj yeem tsim los ntawm surfactants nkaus xwb, neutral ntsev ntxiv rau surfactants, los yog surfactants nrog lwm cov organic additives. Ib neutral Lub tshuab ntxhua khaub ncaws tuaj yeem txhais tau tias yog ib qho tshuaj ntxuav tes uas, hauv kev daws, yuav sau npe ntawm 6 thiab 8 ntawm pH nplai.
Nrog rau txoj kev siv tshuaj tua hluav taws xob, cov khoom yuav tsum tau ntxuav yog muab tshem tawm hauv lub qhov dej thaum cov tshuaj ntxuav yog nqus tawm ntawm lub tank tuav thiab txau, nyob rau hauv siab, mus rau qhov chaw. Cov tshuaj ntxuav yog tas li recirculated. Txau siab yog li ntawm 4 mus rau 40 psi.
Nyob rau hauv txoj kev immersion ntawm daim ntawv thov, qhov chaw yuav tsum tau ntxuav yog tsuas yog immersed nyob rau hauv ib tug tov ntawm lub nqus tsev vacuum muaj nyob rau hauv ib tug me me hlau los yog stainless hlau tank.
Ib zaug ntxiv, kev siv tes so muaj txiaj ntsig ntxiv los ntawm kev pab kho tshuab ntawm lub cev txav cov av los ntawm qhov chaw los ntawm kev siv daim ntaub los yog daim txhuam cev, nrog rau cov ntxhua khaub ncaws pab solubilize cov av.
Neutral Cov tshuaj ntxuav tes feem ntau yog siv los ntawm kev siv yam tsawg kawg ntawm ob theem: theem tu thiab yaug dej. Ntxiv cov theem, ntxuav thiab yaug, siv tau yog tias xav tau. Cov kev daws teeb meem yog tuav ntawm qhov kub ntawm 80 txog 200 ° F (26 txog 93 ° C); Feem ntau 120 txog 160 ° F (49 txog 71 ° C) rau tshuaj tsuag thiab 150 txog 180 ° F (66 txog 82 ° C) rau immersion. Cov khoom raug nthuav tawm rau 30 vib nas this mus rau 5+ feeb; Feem ntau 1 mus rau 2 feeb rau tshuaj tsuag thiab 2 mus rau 5 feeb rau immersion.
Cov kev daws teeb meem tau tuav ntawm qhov concentration ntawm 1/4 txog 16 odgal (2 txog 120 gL); Feem ntau 1 mus rau 2 odgal (8 mus rau 16 gL) rau tshuaj tsuag thiab 8 mus rau 14 odgal (60 mus rau 105 g / L) rau immersion. Neutral cov tshuaj ntxuav tsis tau zoo li cov tshuaj ntxuav thawj zaug. Lawv feem ntau yuav siv los ua precleaner.
Kev npaj tshuaj lom neeg