Galvanizing yog dab tsi?

GNEE Steel Galvanized Mild Steel Sheet

Galvanizing yog dab tsi?

Galvanizing yog ib qho ntawm feem ntau siv rau txoj kev tiv thaiv hlau los ntawm corrosion. Nws suav nrog kev siv cov txheej nyias ntawm zinc rau cov hlau tuab, pab tiv thaiv nws los ntawm ib puag ncig ib puag ncig. Lwm zaus koj nyob hauv koj lub tsheb, saib cov paib ntawm txoj kev thiab cov ncej teeb uas koj hla. Ib tug loj tus naj npawb ntawm lawv yuav muaj ib tug mute, silver xim rau lawv. Qhov "silver" tiag tiag yog txheej ntawm zinc.

Vim li cas Galvanize?

Heev yooj yim, galvanizing ib hlau muab nws anti-corrosion zog. Yog tsis muaj zinc txheej tiv thaiv, cov hlau yuav nyob twj ywm raug rau cov ntsiab lus thiab muaj peev xwm oxidize thiab corrode sai dua. Galvanized Steel yog ib qho txiaj ntsig zoo rau kev siv cov ntaub ntawv xws li austenitic stainless hlau lossis txhuas txhawm rau tiv thaiv corrosion.

Nws Ua Haujlwm Li Cas?

Galvanizing tuaj yeem tiv thaiv hlau yog ntau txoj hauv kev. Ua ntej, nws tsim cov txheej tiv thaiv uas thaiv cov hlau los ntawm ib puag ncig ib puag ncig. Cov txheej zinc tiv thaiv dej thiab ya raws thiab lwm yam hauv huab cua los ntawm kev ua kom cov hlau hauv qab. Yog tias cov zinc txheej tau khawb tob txaus, cov hlau yuav dhau los ua thiab raug rau corrosion.

Galvanizing tuaj yeem tiv thaiv hlau los ntawm cov txheej txheem hu ua "galvanic corrosion". Galvanic corrosion tshwm sim thaum ob hlau ntawm ib qho khoom siv hluav taws xob sib txawv tau muab tso rau hauv kev sib cuag nrog ib leeg nrog ib qho electrolyte tam sim no, xws li dej qab ntsev. Nyob ntawm cov qauv atomic ntawm ob lub hlau, ib qho hlau yog anode thiab lwm qhov yog cathode. Lub anode corrodes sai dua li nws xav tau los ntawm nws tus kheej thiab cov cathode corrodes ntawm qeeb qeeb dua li nws xav tau los ntawm nws tus kheej. Yog vim li cas zinc siv rau galvanizing yog vim nws muaj kev sib raug zoo ntawm kev ua tus anode thaum sib cuag nrog ntau hom hlau. Txij li thaum zinc txheej nyob rau hauv kev sib cuag nrog lub hauv paus hlau feem ntau yog cov anode, nws slows lub corrosion ntawm lub hauv paus hlau, los yog cathode.

Txoj kev sib txawv ntawm Galvanizing

Muaj ntau ntau yam txheej txheem rau galvanizing hlau:

Kub-dip Galvanizing
Raws li lub npe implies, txoj kev no yuav dipping lub hauv paus hlau rau hauv lub pas dej ua ke ntawm zinc. Ua ntej, lub hauv paus hlau yuav tsum tau muab ntxuav los ntawm mechanically, chemically, los yog ob qho tib si kom paub tseeb tias ib tug zoo daim ntawv cog lus yuav ua tau ntawm lub hauv paus hlau thiab zinc txheej. Tom qab ntxuav, lub hauv paus hlau yog fluxed kom tshem tawm cov seem oxides uas yuav nyob twj ywm tom qab ntxuav. Lub hauv paus hlau yog ces dipped rau hauv ib da dej ntawm rhuab zinc thiab ib tug metallurgical daim ntawv cog lus yog tsim.

Qhov zoo ntawm txoj kev no yog tias nws yog kev lag luam; nws tuaj yeem ua tau sai thiab ua rau cov duab nyuaj. Txawm li cas los xij, txheej txheej kawg tuaj yeem tsis sib haum nrog lwm cov txheej txheem galvanizing.

Pre-galvanizing
Txoj kev no zoo ib yam li kub-dip galvanizing tab sis yog ua nyob rau hauv steel zeb, feem ntau yog nyob rau hauv cov ntaub ntawv uas twb muaj ib tug tshwj xeeb zoo. Pre-galvanizing cuam tshuam nrog dov hlau ntawv los ntawm cov txheej txheem ntxuav zoo sib xws rau cov txheej txheem kub-dip galvanizing. Cov hlau yog tom qab ntawd dhau los ntawm lub pas dej kub, kua zinc thiab tom qab ntawd rov ua dua.

Qhov kom zoo dua ntawm txoj kev no yog tias cov coils loj ntawm cov ntawv hlau tuaj yeem ua tau sai sai nrog cov txheej txheem ntau dua piv rau kub-dip galvanizing. Ib qho tsis zoo yog tias ib zaug fabrication ntawm pre-galvanized hlau pib, nthuav tawm, uncoated cheeb tsam yuav tshwm sim. Qhov no txhais tau hais tias thaum ib daim ntawv ntev ntawm cov ntawv txiav rau hauv qhov me me, cov npoo uas cov hlau raug txiav tawm sab laug.

Hluav taws xob galvanizing
Tsis zoo li cov txheej txheem dhau los, electrogralvanizing tsis siv cov zinc da dej molten. Hloov chaw, cov txheej txheem no siv hluav taws xob tam sim no hauv cov tshuaj electrolyte kom hloov zinc ions mus rau hauv cov hlau hauv paus. Qhov no suav nrog hluav taws xob txo qhov zoo ntawm zinc ions rau zinc hlau uas tau muab tso rau ntawm cov khoom zoo. Grain refiners kuj tuaj yeem muab ntxiv uas yuav pab ua kom cov zinc txheej du ntawm cov hlau. Zoo ib yam li cov txheej txheem ua ntej galvanizing, electrogalvanizing feem ntau siv txuas ntxiv mus rau yob ntawm cov ntawv hlau.

Qee qhov zoo ntawm cov txheej txheem no yog txheej txheej tsis sib xws thiab cov txheej tuab tuab. Txawm li cas los xij, txheej txheej feem ntau yog thinner dua li txheej zinc ua tiav los ntawm cov txheej txheem kub-dip galvanizing uas tuaj yeem ua rau txo qis kev tiv thaiv corrosion.