Galvanization txheej txheem yog dab tsi?

GNEE Hlau Galvanized GI Steel Sheet

Muaj ob peb txoj kev ntawm galvanizing hlau. Cov txheej txheem feem ntau yog cov txheej txheem kub-dip galvanization. Txoj kev no ntawm galvanization tsim ib tug zoo, tuab txheej ntawm zinc nyob rau sab saum toj ntawm lub hauv paus hlau - uas ua rau nws ntxiv resistant rau corrosion. Rau feem ntau, cov txheej txheem kub-dipping tsis txi cov txheej txheem kev ncaj ncees ntawm cov hlau, tab sis qee qhov heev.siab zogsteel tuaj yeem raug kev txom nyem los ntawm hydrogen embrittlement.

Cov hlau siv nyob rau hauv lub tsheb lub cev kuj yog galvanized, tab sis vim hais tias cov khaubncaws sab nraud povtseg ntawm cov xim yuav tsum tau siv tom qab - lawv siv ib tug txawv galvanization txheej txheem. Qhov no yog vim cov zinc txheej los ntawm txoj kev kub-dip yog tuab heev, thiab ua rau muaj teeb meem nrog cov xim adhesion.

Hloov chaw, tsheb siv cov txheej txheem electrogalvanization. Ib qho kev daws ntawm dej ntsev (saline) thiab zinc yog muab tso rau hauv lub tank, thiab cov hlau los yog lub hauv paus hlau yog dipped rau hauv. Ib qho hluav taws xob tam sim no khiav los ntawm lub vat, thiab cov zinc bonds rau lub hauv paus hlau!

Ib daim ntawv tshwj xeeb ntawm galvanizing, hu ua Sherardizing, yog siv los tsim cov zinc txheej ntawm cov khoom hlau lossis tooj liab. Nws tau tsim los ntawm metallurgist Sherard Osborn Cooper-Coles thiab patented nyob ib ncig ntawm 1900.

Cov khoom siv hlau uas yuav tsum tau galvanized yog muab tso rau hauv lub kaw, tig lub nruas nrog rau zinc hmoov, thiab qee zaum muaj cov muab tub lim zoo li cov xuab zeb. Tom qab ntawd lub nruas yog superheated rau 500C. Ntawm qhov kub siab tshaj 300C, zinc hloov mus rau hauv vapor - thiab vapor nkag mus rau cov hlau tig sab hauv ntawm lub nruas.

Cov txheej txheem no tseem hu ua "dry galvanizing" vim tias tsis muaj cov kua dej siv.

Qhov no tej zaum yuav muaj pes tsawg qhov me me nyob ib puag ncig koj lub tsev, xws li cov ntsia hlau lossis cov txiv ntseej thiab bolts, tau galvanized. Cov txheej txheem no tsis siv cov hydrogen, yog li hydrogen embrittlement tsis tuaj yeem tshwm sim thaum lub sijhawm no ntawm galvanizing.

Galvanized Steel Chev