1.What yog qhov sib txawv tseem ceeb hauv txoj ntsiab cai ntawm zinc spangle tsim?
Tsiaj tawg hauv kub-dip galvanizing
Thaum lub sij hawm kub-dip Galvanizing, tus kab hlau hlau yog raus hauv Molten Zinc (kwv yees li 450 ° C). Lub Molten zinc infiltrates lub substrate nto, sib sau ib txheej. Lub strip ces txias rau chav sov. Tsiaj ntawv yog macroscopic manifestional ntawm kev taw qhia kev loj hlob ntawm zinc fains (dendrites) thaum lub solidification ntawm cov kua zinc. Dendrites nyob rau hauv molten zinc keeb kwm los ntawm nuclei ntawm lub substrate nto thiab loj hlob nyob rau hauv cov kev taw qhia kev sib tw (los ntawm qhov siab tsawg dua), los ntawm kev ua kom muaj qhov "spangles" nrog cov duab geometric. Lawv qhov loj me yog ncaj qha cuam tshuam nrog lub sijhawm kev loj hlob dendrite thiab faib cov ntsiab lus ntawm alloy.
Spangle tsim hauv electrogalvanizing
Electrogalvanizing yog txheej txheem nyob rau hauv uas zinc ions (zn²⁺) tsiv mus rau cathode (substrate) nyob rau hauv tus neeg hluav taws xob thiab yauv tshem tawm. Cov txheej txheej yog tsim nyob rau hauv chav tsev kub lossis qis dua (20-60 ° C). Cov kab mob yog tsuas yog cov ntaub ntawv sib xyaw ntawm cov ntaub ntawv crystallosited crystallosed, thiab lawv qhov loj me yog txiav txim siab los ntawm cov crystal nuclei thiab cov noob kab ke. Yog tias muaj ob peb lub noob roj crystal nuclei thiab cov nplej loj hlob tsis zoo, cov kab mob me me yuav tsim tau. Yog tias cov ntxiv tau siv los ua kom muaj kev loj hlob los yog txhawb nqa cov khaub ncaws tsis zoo, cov kab mob caj dab tuaj yeem raug tshem tawm thiab lub ntsej muag ci ci tuaj yeem tsim tau.
2.Yog li cas los tswj qhov loj ntawm zinc paj hauv kub-dip galvanizing?
Kev tswj hwm kev tswj ntawm alloying ntsiab
Ntxiv cov ntsiab xws li SB, PB, thiab dev hloov kho cov yam ntxwv ntawm Zinc yaj:
SB thiab PB qis dua qhov taw tes khov, ntev lub sijhawm lub sijhawm, thiab txhawb kev loj hlob;
Siab al ntsiab lus inhibits dendrite kev loj hlob thiab kho cov spangles.
Hauv kev tsim khoom tiag tiag, qhov loj me me yog tswj hwm ncaj qha los ntawm kev kho cov kev sib piv.
Tau 40 tus nqi tswj
Tus nqi cua txias txiav txim siab lub sijhawm txhim kho kev loj hlob:
Kev Txias Txias: Lub sijhawm ntev lub sijhawm sijhawm pub rau tag nrho cov kev loj hlob tag nrho, ua rau thaj chaw loj;
Cauj txias: Sijhawm luv luv lub sijhawm txwv kev txhim kho dendrite kev loj hlob, ua rau cov kab mob me me.
Cov tsis raug: Cov nqi txias ≤ 5K / s rau cov kab tshaj cum loj; txias tus nqi ≥ 15k / s rau me ntsis spangles.
Kev ua kom zoo dua substrate thiab zinc ntub cov khoom
Substrate nto roughness thiab huv si cuam tshuam zinc melt ntub dej uniformity: ntau dhau kev sib cav sib ceg ntawm zinc melt, ua rau muaj kev ntxub ntxaug lwm tus; Tsis txaus huv huv huv huv huv huv tsis txaus ntseeg nucleation, ua rau muaj kev faib tawm tawg tawg.
3.Txhua qhov loj ntawm zinc paj hauv electrogalvanizing?
Electrolyte Composition thiab Additive tswj
Base electrolyte: zinc ion concentration thiab PH muaj kev cuam tshuam ion thiab tus nqi tsiv teb tsaws chaw. Tsawg zinc ion concentration ua ke nrog tus nqi PS txhawb nqa cov hmoov zoo ua kom zoo thiab txo cov tsiaj pheeb suab.
Organic Additives yog qhov tseem ceeb los tswj kev phiv sprangle. Brighteners Adsorb ntawm cov npoo siv lead ua, inhibiting disordered kev loj hlob thiab txhawb kev sib txig sib luag, ncaj qha tshem tawm saum npoo thiab kev sib daj sib luag. Cov neeg sawv cev cov neeg sawv cev hloov kho tam sim no los tiv thaiv cov qoob loo grainening.
Tam sim no tsis thiab tswj qhov kub thiab txias
Qhov ceev tam sim no: ntawm qhov chaw qis tam sim no, cov nyom kev loj hlob yog qhov qeeb thiab muaj peev xwm ua rau kev tsim cov ntxhw zoo. Ntawm qhov siab tam sim no ceev, nucleation yog nrawm, ua rau muaj cov nplej finer thiab txawm tias cov speer zoo tshaj plaws.
Qhov kub thiab txias: nce electrolyte kub nrawm ion diffusion, muaj peev xwm ua rau cov noob qoob loo, uas xav tau kev hloov kho ntxiv kom rov qab ua cov nyhuv no.
Kev Kho Mob Tom Qab Plated
Electrogalvanizing tsis tshua muaj kev vam khom rau qhov xam pom kev ua kom zoo nkauj ntawm kab dam; Kev tshem tawm pob txha yog feem ntau ua tiav los ntawm kev kho mob tom qab kev sib tw xws li passivation, ci plating, lossis lub teeb dov mus tshem tawm cov me me saum npoo me me.
4.What yog qhov sib txawv hauv Zinc Paj thiab loj?
Zinc Paj Morpanizing: Hot-Dip Galvanizing nthuav tawm Zendrite Dendritic, feem ntau muaj cov txiaj ntsig peb-seem, lossis tsis muaj zinc (ci)
Qhov loj me: kub-dip galvanizing tuaj yeem tswj tsis pub dhau 1-15mm (loj zinc paj ntawm 8-13mm yog ib txwm muaj); electroplated zinc yog ib txwm muab ib txwm muab tso rau hauv 0.5 hli, thiab tsis muaj zinc paj tau pom nyob rau hauv kev ua ntawm Brightenters.
Kev nyuaj hauv kev tswj hwm kev tswj hwm: kub-dip galvanizing yog cuam tshuam los ntawm qhov ntws ntawm zinc kua thiab tsis sib xws, uas tuaj yeem ua rau muaj kev sib txawv hauv zos; Kev faib hluav taws xob cuam tshuam los ntawm kev faib khoom tam sim no, thiab cov paj no tau yooj yim tsim ntawm cov npoo vim qhov kev kub siab tam sim no.
Kev Taw Qhia Pom Zoo: Kub-DIP Galvanized Circles lawv tus kheej yog qhov "kev ua haujlwm zoo" (xws li tus kab txaij loj-tiv taus rau ntawm kws kos duab vajtse); electroplated galvanized spangles tau suav tias yog "qhov tsis xws li", thiab lub hom phiaj yog cov khaub ncaws hnav, ci ntsa iab, dawb paug.
5.Thov kev thov cov ntawv qhia kev paub ua lej txiav txim siab sib txawv hauv cov hom phiaj tswj hwm?
Kub-DIP Galvanizing: feem ntau siv nyob rau hauv cov ntawv thov xws li cov chaw ua si thiab sab nraum zoov kuj tsis yog tsuas yog ua kom pom kev zoo heev (tseem ceeb tshaj plaws cov ntsiab lus weldability, cuam tshuam rau wardability). Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau txhawb nqa spangly loj thiab xyuas kom meej cov kev faib khoom uas muaj kev faib tawm.
Electrogalvanizing: feem ntau siv nyob rau hauv cov ntawv thov xws li cov khoom siv hauv tsev thiab cov tsiaj txhu hauv tsev tuaj yeem ua rau cov txheej txheem tsis sib xws thiab sib txawv sib txawv. Yog li ntawd, lub hom phiaj yog kom tshem tawm cov tsiaj phwj. Brighteners thiab siab tam sim no ceev yog siv los ua tiav tus du, spangle-dawb nto.