1.How los txo qhov cuam tshuam ntawm "qhov sib txawv saum npoo" ntawm zinc depition?
Ua kom huv si kom tsis txhob muaj roj ntau dua:
Cov roj tov cov roj xws li Rolling roj thiab xeb {{} Cov roj uas tau ua pov thawj rau ntawm lub zinc thiab cov plhaw ua pov thawj "lossis ib qho tsis sib haum zinc txheej. Degreasing yuav tsum muaj kev sib xyaw ua ke ntawm alkaline tu (piv txwv li, sodium hydroxide tov) thiab txau / immersion. Tswj cov alkaline concentration (feem ntau 2% -5%), ntsuas kub (kho kom haum (kho kom haum rau cov roj paug, feem ntau 3-5 feeb) los xyuas kom tiav cov roj. Yaug kom huv si nrog dej huv los tiv thaiv kev ua kom zoo alkaline los ntawm kev ua rau muaj kev ua kom huv.
Zoo heev pickling tshem tawm oxide nplai thiab zam dhau - pickling:
Oxide nplai (piv txwv li, fe₃o₄, fe₂o₃) ntawm cov ntaub ntawv steel los ntawm kev tshem tawm, xav tau kev tshem tawm cov kua qaub (piv txwv li hydrochloric acid tov). Tus yuam sij yog tswj tus pickling tus pickingers: lub zog hydrochloric acid zoo ib txwm muaj kev hloov kho raws li cov tuab ntawm cov oxide nplai (feem ntau 5-10 feeb). Hauv qab-pickling yuav ua rau seem oxide oxide nplai, tiv thaiv cov kab zinc los ntawm kev ua raws li thaj chaw. Kev ua kom dhau los tuaj yeem ua rau "pitting" ntawm cov hlau saum npoo av (ntau dhau ntawm cov txheej txheem ntawm lub substrate), qhov twg cov txheej zinc uas tau ua rau, ua rau tsis muaj qhov sib txawv. Tom qab pickling, cov khoom seem uas tau tso tawm kom muaj kev cuam tshuam nrog kev daws teeb meem alkaline ua raws li los ntawm kev yaug nrog cov dej huv rau qhov nruab nrab vib.
Tswj tswj lub substrate nto roughness:
Kev ntxhib ntxhib substrate qhov chaw (piv txwv li, ntau dhau qhov muaj nuj nqis (cov nqi zinc Ntau dhau txoj kev ua kom du ntawm cov chaw muaj peev xwm cuam tshuam zinc nplaum. Substrate roughness yuav tsum tau tswj tau thaum lub sijhawm rolling (feem ntau, ib ra ntawm 0.2- 3.2μm yog pom zoo rau kub-dip galvanized substrates). Yog hais tias lub substrate roughness tsis txaus siab, nws tuaj yeem tsim kho kom zoo los ntawm lub teeb sib tsoo lossis kho cov roughness ntawm cov yob yob.
2.Yog li cas los txhawm rau tswj hwm cov txheej txheem galvanizing rau kub -} dip galvanizing?
Zinc da dej kub thiab galvanizing sijhawm:
Ntau dhau siab galvanizing kub (saum toj 470 degree) tuaj yeem ua rau cov txheej txheem digly Tsawg kub (qis dua 430 degree) tuaj yeem ua rau qhov tsis zoo zinc fluid thiab tsis sib luag Tswj qhov kub khov kho ntawm 445-455℃(± 5℃kev hloov pauv).
Kev ntev heev Galvanizing lub sij hawm (ntau dua 30 vib nas this) tuaj yeem ua rau cov txheej tuab tuab tuab sioy, thiab cov ntshiab zinc txheej yuav ua rau muaj kev ntxhib thiab tsim txom. Luv luv ib lub sijhawm galvanizing (tsawg dua 10 vib nas this) tuaj yeem ua rau qhov tsis tiav zinc txheej. Kho lub sijhawm galvanizing raws li steel phaj tuab: 10-15 vib nas this rau cov phaj nyias (tsawg dua los yog sib npaug rau cov txheej txheem tuab si chliorm Lub kaum thiab nrawm ntawm cov ntawv hlau nkag rau cov zinc da dej:
Yog tias cov ntawv hlau nkag mus rau qhov zinc da dej ntawm lub kaum sab xis (tsis- ntsug lossis kab rov tav, ua rau muaj kev pib tsis zoo rau zinc deposition. Yog tias qhov nrawm nrawm dhau, cov da dej Equipment should be used to control the entry angle to 85-90℃(close to vertical) and the entry speed to a stable 1-2 m/min (adjusted to the width of the steel sheet; a slower speed may be appropriate for wider sheets) to avoid speed fluctuations.
Cua Riam Parameter Opfeenization (tseem ceeb):
Tom qab cov ntawv hlau yog kos los ntawm cov da dej zinc, dhau mus zinc yuav ua raws li saum npoo. Ib rab riam cua (qhov siab {{1} kub} lub siab cua daj cua dub) yuav tsum tau siv kom tawg kom tawg thiab tswj cov txheej tuab ntawm zinc txheej. Cov cua rab riam yog cov cuab yeej tseem ceeb uas txiav txim siab qhov sib txawv ntawm cov kev sib txawv ntawm kub- dip galvanizing txheej. Kev tswj kev ywj pheej yuav tsum muaj:
Cov Riam Tshuab Siab: Tsawg dhau lub siab yuav tsis tshem tawm zinc ntau, ua rau cov tuab thiab tsis sib luag zinc txheej. Siab heev lub siab yuav txig cov txheej zinc (tshwj xeeb tshaj yog ntawm cov nplooj hlau nyias nyias). Feem ntau, lub siab yog kho raws lub hom phiaj Zinc Txheej Thickness: Rau zinc txheej tuab ntawm 50-80g / ㎡, lub siab yog 0.2 -0.3mpa; Rau qhov zinc txheej tuab ntawm 100-150G / ㎡, lub siab yog 0.1-0.2MPA.
Cov rab riam huab cua nyob deb thiab kaum sab xis: cov cua riam nozzle yuav tsum yog nyob deb ntawm cov hlau phaj sib nrug (feem ntau 100-150mm). Kev tsis sib xws yuav ua rau tsis sib thooj zinc coating tuab tuab ntawm ob sab ntawm cov hlau phaj. Lub kaum ntse ntse yuav tsum tau txiav kom sib tshuam nrog cov hlau phaj nto (± 2 degree). Inclining lub nozzle yuav ua rau muaj airflow thiab ntau zinc residue hauv qee thaj chaw.
Cov rab riam muaj cua daj cua dub: Lub nozzle yuav tsum tau ntxuav kom tiv thaiv kom tsis txhob muaj kev tiv thaiv kom tsis txhob muaj kev tiv thaiv "
3.For electrogalvanizing, yuav ua li cas thiaj tswj tau cov txheej txheem galvanizing?
Ceev tam sim no ceev thiab electrode artpement:
Ceev tam sim no tseem ceeb heev rau zinc ion oion tso nyiaj. Yog tias qhov ceev ceev tam sim no siab dhau (piv txwv li cov electrode yog qhov ze rau qee qhov taw tes rau ntawm qhov chaw ntawd sai sai. Yog tias qhov ceev ceev tam sim no tsawg dhau, zinc txheej yuav thinner. Qhov ceev ceev tam sim no yuav tsum tau tswj hwm ntawm 10-30A / dM² (kho raws li hom electrolyte). Xyuas kom meej tias cov hluav taws xob tau teem rau kev hwm rau cov phaj steel (piv txwv li cov phaj steel sib npaug, nrog kev ua kom ntev dua lossis sib npaug rau 5 hli). Yog tias tsim nyog, cov pob txha me me yuav tsum muab tso rau hauv cov chaw uas muaj qhov sib txawv ntawm cov hlau) kom tawg qhov tam sim no.
Cov Hluav Taws Xob Electrolyte:
Zinc ion concentration hauv electrolyte (feem ntau yog 30-60g / l) yuav tsum ruaj khov. Kev txo qis dhau ib qho kev xav yuav ua rau tsis muaj zinc Ion muab khoom, qeeb thiab tsis pom kev. Siab heev yuav ua rau zinc plinc Dag, nag lossis ua rau muaj cov txheej zinc me ntsis. Nyob rau tib lub sijhawm, tswj cov accololyte pyl kev hloov pauv yuav txo qis qhov chaw ruaj khov yuav txo cov txheej txheem hauv zos "ntawm cov khoom siv hluav taws xob" ntawm cov khoom siv hluav taws xob "
4.How kom ua kom zoo dua zinc daws / electrolyte zoo thiab txo kev cuam tshuam nrog "cuam tshuam loj dua"?
Kub - dip galvanizing da: Fe tsawg dua lossis sib npaug lossis sib npaug lossis sib npaug lossis 0.01%), yuav tsum tau tswj hwm. Cov ntaub ntawv hlau ntau dhau yuav tsim "zinc hlau slag," uas cov adheres rau cov hlau saum npoo thiab ua rau cov kab zinc hauv zinc txheej. Hmoov txhuas thiab Cadmium txo cov kua dej ntawm da dej, tiv thaiv cov txheej zinc ntawm kis tusyees. Yuav txo cov kab mob uas tsis taus los ntawm kev tshem cov dej da dej, ntxiv rau lub ntiaj teb tsis tshua muaj zog "(qhov chaw da dej tsis tshua muaj zog)
Electrogalvanizing Electrolyte: Hnyav Hlau Impurities xws li Hlau, Tooj, thiab Nickel yuav tsum zam (cov ntsiab lus yuav tsum muaj tsawg dua lossis sib npaug rau 0.1 G / L). Cov impurities no yuav xum tso nyiaj nyob rau sab npoo av, ua rau ib cheeb tsam "neeg sawv cev" ntawm zinc txheej thiab tsis sib luag. Cov kev lim dej tsis tu ncua ntawm electrolyte (siv cov pej xeem lim dej nrog tsawg dua los yog sib npaug rau preuxiliation electrode) yog qhov tsim nyog los tshem tawm impurities.
1.How tswj cov ntawv txheej xwm?
Kub - dip galvanizing: tsom rau cov ntaub ntawv tais diav (cov yob uas coj cov hlua khi (uas tswj cov tiaj tus ntawm cov ntawv hlau). Yog tias cov chais tau hnav (grooves tshwm sim) lossis misaligned, daim ntawv steel yuav "wobble" nyob rau hauv ib tug rollers, "uas yog zinc txheej zinc," ua rau lub zinc me me zinc. Cov menyuam tsis tu ncua ua polishing yog yuav tsum tau kom muaj qhov chaw du thiab cov menyuam muaj tsawg dua lossis sib npaug rau 0.5 hli / m) kom ntseeg tau tias ua haujlwm ruaj khov ntawm cov ntawv hlau.
Cov Khoom Siv Hluav Taws Xob: Tshawb xyuas cov ntaub pua chaw "hauv cov xov tooj electrolytic (uas kis tau rau cov ntawv hlau) rau kev sib cuag. Yog tias cov txiv neej coj los ua cov tshuaj lom neeg yog cov oxidized lossis tau xoob xoob, qhov no tuaj yeem ua rau qee qhov "ntawm cov qauv steel, tiv thaiv zinc depigition. Kev tu kom huv ntawm cov menyuam ua haujlwm sib txawv (kom tshem tawm cov yeeb yaj kiab oxide) yog qhov yuav tsum tau ua kom muaj kev sib tiv thaiv "