Kub Dip Galvanized Yeeb Nkab
Kub-dip galvanizing (HDG), raws li hais txog yog cov txheej txheem ntawm dipping fabricated steel rau hauv lub lauj kaub los yog vat ntawm molten zinc.
Kub-dip galvanizing (HDG) yog txheej txheem ntawm txheej hlau, hlau lossis ferrous cov ntaub ntawv nrog ib txheej ntawm zinc. Qhov no ua los ntawm kev hla cov hlau los ntawm molten zinc ntawm qhov kub ntawm 860 degree F (460 degree) los ua zinc carbonate (ZNC03). Zinc carbonate yog cov khoom siv muaj zog uas tiv thaiv cov hlau thiab tuaj yeem tiv thaiv corrosion hauv ntau qhov xwm txheej. Kub-dip galvanizing tuaj yeem nqa tau pheej yig thiab hauv cov khoom loj.
Cov txiaj ntsig ntawm galvanized yeeb nkab
Vim tias cov kav dej yog galvanized, nws muaj kev tiv thaiv los ntawm xeb thiab corrosion. Hlau xeb tom qab cuam tshuam nrog dej lossis noo noo hauv huab cua dhau sijhawm. Los ntawm kev ntxiv cov zinc txheej rau cov tubing, galvanized steel round tubing corrodes qeeb qeeb, txuas lub neej ntawm koj cov tubing.
Ntxiv rau qhov no, galvanized yeeb nkab kuj muab:
Tus nqi qis dua stainless hlau
Tsawg tshaj tus nqi mus sij hawm ntev
Txhim khu kev ua tau zoo
Zoo heev tiv thaiv txhua yam kev puas tsuaj
Kub dipped galvanized nrog PE txheej welded steel kav
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.
Yog li, PE Coated Steel Pipes tau txais txiaj ntsig zoo txawm tias nyob rau hauv ib puag ncig hnyav xws li thaj chaw huab cua txias, thaj chaw suab puam thiab hauv qab hiav txwv.
Kub-dip galvanizing muaj peb kauj ruam tseem ceeb:
Kev npaj: Cov tshuaj tiv thaiv galvanizing tsuas yog tshwm sim ntawm cov tshuaj huv huv, yog li thawj kauj ruam ntawm cov txheej txheem yuav tshem tawm cov kab mob. Ua ntej, cov hlau yog degreased siv cov tshuaj caustic thiab tom qab ntawd dipped hauv hydrochloric acid kom tshem tawm xeb, zeb nplai, vuam slag, xim thiab roj. Qhov no ua raws li cov dej yaug thiab poob rau hauv cov tshuaj flux, uas feem ntau yog li 30 feem pua zinc ammonium chloride.
Galvanizing: Thaum cov hlau huv los yog cov hlau tsis huv yog dipped rau hauv cov zinc molten (ntawm 842 degree F (450 degree)), zinc-hlau alloy txheej txheej tsim los ntawm metallurgical cov tshuaj tiv thaiv ntawm cov hlau thiab zinc. Thaum cov khoom raug rub los ntawm lub galvanizing da dej, ib txheej ntawm molten zinc yog tam sim no nyob rau sab saum toj ntawm lub alloy txheej. Thaum nws txias, nws muaj qhov ci ci, ci ntsa iab nrog cov khoom siv galvanized.
Kev tshuaj xyuas: Tom qab galvanizing, cov ntaub ntawv coated raug tshuaj xyuas rau txheej thickness thiab txheej txheej. Muaj ntau yam kev sim lub cev yooj yim thiab kev kuaj sim yuav ua tau los txiav txim siab thickness, uniformity, adherence thiab tsos ntawm zinc txheej.
Cov txheej txheem sib txawv ntawm galvanizing
Muaj ntau ntau yam txheej txheem rau galvanizing hlau:
1. 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 rau cov duab nyuaj. Txawm li cas los xij, txheej txheej kawg tuaj yeem tsis sib haum nrog lwm cov txheej txheem galvanizing.
2. 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 thaj chaw 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.
3.ELECTRO-GALVANIZING
Tsis zoo li cov txheej txheem dhau los, electrogalvanizing 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.
