Txhim kho qhov kev sib txuam ntawm zinc txheej yog cov kauj ruam tseem ceeb hauv kev ua kom muaj kev ruaj ntseg ntawm cov ntawv txheeb ze ntawm cov ntawv txheeb (xws li Secc). Qhov no yuav tsum tau sib koom tes tswj cov kev tswj hwm ntau yam, suav nrog cov ua haujlwm, electroplating tsis, cov cuab yeej tsim qauv, thiab substrate cov xwm txheej. Cov hau kev tshwj xeeb yog raws li hauv qab no:
1. Kev ua kom zoo ntawm cov txheej txheem pretrate pretrecent
Txoj kev nyiam huv, roughness, thiab kev sib txuam ntawm cov sab nrauv yog qhov tseem ceeb rau cov khoom siv zinc deposition. Cov kev tuav tseem ceeb muaj xws li:
Ua kom tiav tshem tawm cov nplaim hluav taws xob:
Degreasing: Ultrasing lossis electrolytic degreasing yog siv los xyuas kom meej tias cov roj tsis huv thiab ntiv tes) raug tshem tawm kiag li. Cov roj uas muaj peev xwm tiv thaiv cov txheej zinc los ntawm kev tso tawm hauv qee thaj chaw (uas ua rau "nthuav tawm hauv qab). Kev tswj hwm tus neeg sawv cev degreasing (piv txwv li, alkaline degreiting tus neeg sawv cev, pH 10-}}}}}}}}}}}}}}}}}}} 10} Tom dej yaug dej yaug (cov dej ntshiab coj tsawg dua los yog sib npaug ntawm 10μs / cm) kuj tau pom zoo los tiv thaiv cov paug theem nrab. Pickling thiab kev ua kom: Thaum tshem tawm cov nplai thiab xeb, 5-15% etching kom tsis txhob "ntau dua li" (pitting rau saum npoo) lossis "nyob rau hauv-etching" (residual nplai "(residual nplai). Corrosion Inhibitors (piv txwv li, Hexamine) tuaj yeem raug ntxiv los txo cov qauv corrosion thiab kom ntseeg tau tias kev ua haujlwm ntawm cov nto.
Tswj kev ua kom muaj kev sib tw
Lub substrate nto roughness (RA) yuav tsum muaj kev sib xws (piv txwv li, ra 0.8-1.6μm), zam thaj tsam ntawm kev ntxhib los yog zoo kawg nkaus. Kev hloov pauv ntawm cov tshuaj sib txawv tuaj yeem ua rau muaj peev xwm hloov tau zoo nkauj Cov menyuam roughness tuaj yeem tswj tau thaum lub sij hawm txias rolling, lossis sandblasting / sib tsoo}}} Kho kom tswj ntawm electroplating tswj
Hauv electrogalvanizing (Secc yog hom electrogalvanizing), tam sim no cov yam ntxwv hloov hluav taws xob yog qhov tseem ceeb ntawm kev sib txuam thiab kev xav tau lub hom phiaj ua kom zoo dua:
1. Txhim kho cov khoom xa tawm tam sim no (cov qauv tseem ceeb)
Qhov kev sib tw ntawm kev txiav txim siab tam sim no cov txheej txheem faib tuab ntawm cov txheej txheem zinc Qhov no tuaj yeem hloov kho los ntawm cov hauv qab no:
Xaiv cov txiaj ntsig zoo tam sim no: teeb tsa qhov tseeb tam sim no (feem ntau 10 {{{{{}} 30 A / dM²) raws li cov khoom siv substrate thiab cov duab. Kev nrawm dua tam sim no tuaj yeem ua rau "overer-oating" (thicker txheej txheem qeeb dua tus nqi thiab cov ces tsis muaj peev xwm ua rau txheej txheem uneven coating tuab.
Siv Auxiliae Anodes thiab Shielding Machine:
Rau cov workpeces nyuaj (xws li cov ces kaum thiab cov qhov), xws li soluble zinc anodes lossis insoluble tentanium anodes) tuaj yeem ntxiv los them nyiaj rau cov chaw tsis txaus ntseeg.
Rau cov cheeb tsam tau mus rau "ntug kev cuam tshuam" (xws li cov ntaub ntawv hlau nplaum thiab cov ntaub thaiv npog) tuaj yeem ntxiv los tiv thaiv cov txheej txheem roj av hauv zos thiab tiv thaiv tuab. Siv daim duab Anode (contoured anode): rau cov kev ua haujlwm tsis xwm yeem), tsim kev sib txawv ntawm txhua qhov chaw ua haujlwm thiab anode, yog li txo cov kev faib tawm tam sim no.
2. Txha ruaj electrolyte cov khoom
Qhov hluav taws xob muaj pes tsawg leeg, ntsuas kub, thiab nplawm cov mob ncaj qha cuam tshuam ncaj qha cuam tshuam zinc ion
Tswj electrolyte muaj pes tsawg leeg thiab concentration:
Cov Zinc Ions siab (piv txwv li, 50-80 g / u znont concentration hauv chloride zinc plating) yuav tsum ruaj khov. Qhov tsawg dhau concentration cov txiaj ntsig tau nyob rau hauv kev tso tawm qeeb thiab kev sib tw; Ib tug heev siab siab tuaj yeem ua rau txheej tawv.
Kho tus nqi pH (piv txwv li, ph 3-5 rau cov kua qaub zinc plating) kom tsis txhob muaj ntau hom cej funcalitation yooj yim, ua rau suav nrog hauv txheej).
Ntxiv cov khoom ntxiv tshwj xeeb: cov qib siab (piv txwv li, benzylidene acetone) tuaj yeem kho cov kab ke tam sim no, thaum muaj kev sib txawv ntawm qhov loj me me thiab qhov sib txawv ntawm qhov chaw siab thiab qis. Saib xyuas qhov kub thiab txias ultrasonic: siv cua sov lossis cua txias rau hauv lub tank interlayer kom tswj tau cov kev hloov pauv tsawg dua lossis sib npaug (piv txwv li 20-40℃rau acid galvanizing). Hauv cheeb tsam overheating yuav nrawm zinc ion diffusion, ua rau muaj cov txheej txheej tuab hauv thaj chaw ntawd.
Txhim kho electrolyte ncig thiab kev ntxhov siab: siv tus nqi nqus dej (ntws mus kom ntseeg tau tias yog cov khoom siv hluav taws xob "nyob ze ntawm cov chaw ua haujlwm (uas tuaj yeem ua rau lub zos txo qis hauv cov nqi rho nyiaj).
III. Txhim Kho Cov Khoom Siv Thiab Tuam Txhab Tsim
Cov qauv qauv qauv thiab cov qauv ua haujlwm clamping txoj kev cuam tshuam ncaj qha rau tam sim no thiab electrolyte faib:
Tus txheeb ze txoj hauj lwm ntawm electrode thiab workpiece: ua kom lub anode thiab workpifly yog qhov sib txawv tam sim no thiab cov kev sib txawv ntawm qhov sib txawv (siab dua tam sim no nyob ze ntawm anode thiab thicker txheej). Careerive Tus Qauv Tsim: Tus Khuam Khawb Ncaws Yuav tsum tswj hwm kev sib cuag nrog tus neeg ua haujlwm (piv txwv li, siv cov kev sib cuag tsis zoo "(hauv zos poob thiab txheej nyias nyias). Rau cov haujlwm ntev ntev, ntau cov ntsiab lus tseem ceeb yuav tsum tau siv (piv txwv li, cov ntsiab lus hu rau txhua 50 cm) kom txo qis qhov ntev ntawm qhov chaw ua haujlwm.
Electroplating tank qauv: kom dhau ntawm cov neeg tuag nyob hauv lub tank kom ntseeg tau tias kev ncig hluav taws xob du. Rau kev txuas ntxiv cov kab hauv av (piv txwv li, sawb Galvanizing), kom tsis txhob muab cov kev sib txawv ntawm qhov chaw thiab tsis txhob muaj kev sib tw "
IV. Tswj cov kev sib txuam ntawm cov txheej txheem ntawm substrate nws tus kheej
Kev hloov pauv hauv cov khoom siv substrate thiab qhov xwm txheej tshwm sim tuaj yeem ua rau "xaiv tsis ncaj ncees" hauv Zinc Depepition, uas yuav tsum tau tswj hwm ntawm qhov chaw:
Cov tshuaj lom neeg sib xyaw ua ke ntawm substrate: xyuas kom meej tias cov pa roj carbon monoxide (piv txwv li {} Txo cov substrate degromic discoms xws li khawb, pits, thiab seem ntawm cov nplai. Cov kab mob no tuaj yeem ua rau cov txheej zinc kom tau nyiaj sai dhau (kev sib tw ua pob) lossis qeeb qeeb (ua cov chaw muaj kev ntxhov siab. Txias dov thiab annealing cov txheej txheem yuav tsum tau ua kom zoo rau lub substrate nto zoo.
V. Tshuaj xyuas thiab cov tswv yim kev hloov kho
Online coating Thickness ntsuas kev ntsuas: Siv ib qho x - Tshav Fluorescent tuab tuab ntawm qhov chaw sib txawv (piv txwv li ntug, thiab dav). Yog tias qhov sib txawv tshaj plaws ± 5%, kho cov ntawv faib tawm tam sim no, electrolyte messstration, lossis electrode txoj hauj lwm kom sai.
Nquag cov khoom siv tsis tu ncua xws li ammeters, ntsuas kub ua kom tiv thaiv cov txheej txheem tsis raug mob tshwm sim los ntawm cov cuab yeej ua haujlwm tsis zoo, uas tuaj yeem cuam tshuam txheej txheej sib luag.
Lub ntsiab
Cov ntsiab lus tseem ceeb rau kev txhim kho Zin Txheej Txheej Kev Lom Zem yog: Tshem tawm cov ua rau "cov chaw ua haujlwm hauv zos kom muaj kev sib txawv ntawm kev ua yeeb yam zoo; Kev ua kom zoo dua tam sim no thiab cov electrolyte kom ua tiav kev tsav tsheb tsis zoo rau Zinc ion Depeposition; thiab txo cov lus faib tawm los ntawm lub cev nqaij daim tawv los ntawm cov khoom siv tsim. Thaum kawg, ua tiav cov txheej txheem txheej txheej tuab tuab thiab qauv. Cov txheej txheem no yuav tsum tau hloov kho kom haum nrog cov txheej txheem galvanizing (xws li electrogalvanizing, kub} dip galvanizing) thiab cov ntaub ntawv ua haujlwm (phaj tshwj xeeb {4 4 4 4 4. Tshwj xeeb tshaj yog nyob rau hauv kev sib tw txuas ntxiv galvanizing, tswj kev sib haum ntawm kev ceev, nro thiab electrode kev npaj yog qhov tseem ceeb.