Qhov yuam kev tseem ceeb thaum galvanizing lub tsheb lub cev ntawm koj tus kheej

Galvanization ntawm lub tsheb lub cev yog cov cuab yeej siv tau zoo tshaj plaws rau kev tiv thaiv corrosion, uas ua rau nws muaj peev xwm ua haujlwm hauv lub tsheb hauv cov xwm txheej tsis zoo uas tsis muaj qhov tshwm sim. Muaj tseeb, nws kim heev. Nws tsis yog qhov xav tsis thoob, yog li ntawd, cov tswv ntawm cov tsheb siv, tshwj xeeb tshaj yog cov uas twb tau "bloomed", nyiam ua cov txheej txheem no ntawm lawv tus kheej. Tab sis feem ntau tsis muaj kev vam meej. Yog vim li cas, thiab yuav ua li cas kom zoo galvanize lub tsheb nyob rau hauv tsev, lub AvtoVzglyad portal xam tawm.

Nrog kev kho tus kheej lub cev, tus neeg tsav tsheb saib xyuas nyiam npog cov hlau liab nrog ib yam dab tsi ua ntej pleev xim. Thiab qhov kev xaiv, raws li txoj cai, poob ntawm "ib yam dab tsi nrog zinc." Txawm li cas los xij, ob peb tus neeg paub tias muaj qee qhov tshwj xeeb tshwj xeeb rau galvanizing ntawm lub khw niaj hnub no. Hauv khw muag khoom, tus tswv tsheb feem ntau muag primers nrog supposedly zinc, thiab zoo kawg xeb converters rau zinc. Tag nrho cov no muaj me ntsis ua nrog tiag tiag galvanizing.

WRONG lus…

Yog li, ib qho "kab" ntawm xeb tau tshwm sim ntawm koj lub tsheb. Nyob rau hauv cov ntaub ntawv ntawm cov tsheb siv, qhov teeb meem yog heev, tshwj xeeb tshaj yog nyob rau hauv lub cheeb tsam ntawm cov pib thiab log arches. Feem ntau cov chaw no tsuas yog ntxuav ntawm xoob xoob, moistened nrog qee yam hloov pauv, primer thiab xim yog siv. Ib ntus txhua yam zoo, thiab tom qab ntawd cov xeb tuaj dua. Ua li cas? Tom qab tag nrho, nyob rau hauv kev npaj lawv siv ib tug xeb-rau-zinc converter! Yam tsawg kawg yog qhov nws hais ntawm daim ntawv lo.

Qhov tseeb, tag nrho cov kev npaj no yog tsim los ntawm orthophosphoric acid thiab qhov siab tshaj plaws uas muaj qhov sib xyaw ua tau yog phosphate saum npoo, thiab qhov no yuav yog porous phosphating, uas yuav xeb yav tom ntej. Cov yeeb yaj kiab uas tshwm sim tsis tuaj yeem siv los ua kev tiv thaiv ywj pheej - tsuas yog rau kev pleev xim. Raws li, yog tias cov xim tsis zoo, los yog tsuas yog tev tawm, txheej no yuav tsis tiv thaiv corrosion.

YUAV UA LI CAS?

Nyob rau hauv lub rhawv ntawm peb lub khw muag khoom kuj tseem muaj tiag tiag compositions rau nws tus kheej-galvanizing, thiab muaj ob hom - rau txias galvanizing (cov txheej txheem no kuj hu ua galvanizing) thiab galvanic galvanizing (lawv feem ntau tuaj nrog ob qho tib si electrolyte thiab anode), tab sis lawv raug nqi ib qho kev txiav txim ntawm qhov ntau kim dua li cov converters. Peb tsis txhob siv txias galvanizing rau hauv tus account, nws yog Ameslikas invented rau txheej hlau lug, nws yog unstable rau organic solvents thiab txhua yam puas. Peb txaus siab rau txoj kev galvanic ntawm kev thov zinc, thaum txhua yam tsim nyog rau cov txheej txheem no tuaj yeem ua tiav hauv tsev. Yog li, nws puas yuav xav tau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau lub cev?

Ua ntej pib ua haujlwm, koj yuav tsum nco ntsoov saib xyuas kev nyab xeeb thaum ua haujlwm nrog cov tshuaj reagents: siv lub npog ntsej muag ua pa, hnab looj tes roj hmab, tsom iav, thiab ua txhua yam khoom siv sab nraum zoov lossis hauv qhov chaw muaj cua zoo.

PLUS IB TUG DEJ

Theem ib. Kev npaj hlau. Hlau nto yuav tsum tsis muaj xeb thiab xim. Zinc tsis poob rau ntawm xeb, thiab ntau dua li ntawm cov xim. Peb siv cov ntawv xuab zeb los yog cov nozzles tshwj xeeb ntawm kev xyaum. Nws yog qhov yooj yim tshaj plaws rau boil ib feem me me hauv 10% (100 grams ntawm acid ib 900 ml ntawm dej) tov ntawm citric acid kom txog thaum lub xeb puas tag. Tom qab ntawd degrease qhov chaw.

Theem ob. Kev npaj ntawm electrolyte thiab anode. Galvanic galvanizing txheej txheem yog raws li nram no. Hauv cov tshuaj electrolyte (cov electrolyte ua haujlwm ntawm cov khoom siv), zinc anode (uas yog, ntxiv rau) hloov zinc rau cathode (uas yog, rho tawm). Muaj ntau cov zaub mov txawv ntawm electrolyte floating nyob ib ncig ntawm lub vev xaib. Qhov yooj yim tshaj plaws yog siv hydrochloric acid, uas zinc yog yaj.

Acid tuaj yeem yuav ntawm lub khw muag tshuaj reagent, lossis hauv khw muag khoom kho vajtse. Zinc - nyob rau hauv tib lub khw muag tshuaj, los yog yuav cov roj ntsha ntsev zoo tib yam thiab tshem tawm cov ntaub ntawv ntawm lawv - nws yog ua los ntawm zinc. Zinc yuav tsum tau yaj kom txog thaum nws tsis ua haujlwm. Nyob rau hauv cov ntaub ntawv no, cov roj tso tawm, yog li tag nrho cov manipulations, peb rov hais dua, yuav tsum tau nqa tawm nyob rau hauv txoj kev los yog nyob rau hauv ib tug zoo-ventilated cheeb tsam.

Cov electrolyte yog ua kom nyuaj nyob rau hauv no txoj kev - nyob rau hauv 62 milliliters dej peb dissolve 12 grams zinc chloride, 23 grams ntawm poov tshuaj chloride thiab 3 grams boric acid. Yog xav tau ntau electrolyte, cov khoom xyaw yuav tsum tau nce proportionately. Nws yog qhov yooj yim tshaj kom tau txais cov tshuaj reagents hauv lub khw tshwj xeeb.

HLUB THIAB SAD

Theem peb. Peb muaj ib tug tag nrho npaj nto - ntxuav thiab degreased hlau, ib tug anode nyob rau hauv daim ntawv ntawm ib tug zinc case los ntawm ib tug roj teeb, electrolyte. Peb qhwv lub anode nrog paj rwb ncoo, los yog paj rwb ntaub plaub, los yog gauze folded nyob rau hauv ob peb txheej. Txuas lub anode mus rau qhov ntxiv ntawm lub tsheb roj teeb los ntawm ib lub xaim ntawm qhov tsim nyog ntev, thiab tus minus rau lub tsheb lub cev. Dip cov paj rwb ntaub ntawm lub anode rau hauv electrolyte kom nws saturated. Tam sim no, nrog kev txav qeeb, peb pib tsav ntawm cov hlau liab qab. Nws yuav tsum muaj grey tiav ntawm nws.

YUAV UA LI CAS?

Yog hais tias lub txheej yog tsaus nti (thiab yog li ntawd nkig thiab ntxeem tau), ces koj tsav lub anode maj mam, los yog tam sim no ceev heev (nyob rau hauv cov ntaub ntawv no, tshem tawm cov rho tawm ntawm lub roj teeb), los yog cov electrolyte tau qhuav ntawm lub paj rwb ntaub plaub. Ib txheej grey txheej yuav tsum tsis txhob muab pov tseg nrog ib tug ntiv tes. Lub thickness ntawm txheej yuav tsum tau kho los ntawm qhov muag. Nyob rau hauv txoj kev no, mus txog 15-20 µm txheej tuaj yeem siv tau. Tus nqi ntawm nws qhov kev puas tsuaj yog kwv yees li 6 microns ib xyoos twg thaum sib cuag nrog ib puag ncig sab nraud.

Nyob rau hauv cov ntaub ntawv ntawm ib feem, nws yuav tsum tau npaj ib da dej (yas los yog iav) nrog ib tug electrolyte. Cov txheej txheem yog tib yam - ntxiv rau zinc anode, rho tawm rau qhov seem. Lub anode thiab cov khoom seem yuav tsum muab tso rau hauv cov electrolyte kom tsis txhob kov ib leeg. Tom qab ntawd tsuas yog saib rau zinc nag lossis daus.

Tom qab koj tau thov zinc, nws yuav tsum tau yaug qhov chaw ntawm zinc zoo nrog dej kom tshem tawm tag nrho cov electrolyte. Nws yuav tsis yog superfluous rau degrease saum npoo dua ua ntej pleev xim. Ua li no, qhov chaw lossis lub cev ua haujlwm tuaj yeem ua rau lub neej ntev. Txawm tias muaj kev puas tsuaj ntawm txheej txheej ntawm cov xim thiab primer, zinc yuav tsis xeb sai sai rau cov hlau kho.