Galvanizd Steel

Dab tsi yog Galvanizing?

Galvanizing, lossis galvanization, yog txheej txheem tsim cov txheej txheem ntawm qhov chaw uas cov xeb ntawm cov hlau xeb siv rau hlau lossis hlau los tiv thaiv thiab tiv thaiv xeb. Muaj ntau ntau cov txheej txheem galvanizing muaj, tab sis cov feem ntau muaj thiab siv cov qauv raug hu ua kub-dip galvanizing.

Galvanized steelis ntawm cov nyiam hlau tshaj plaws vim tias nws txoj kev ua kom ntev, muaj lub zog thiab tsim ntawm cov hlau ntxiv rau kev tiv thaiv corrosion ntawm zinc-hlau txheej. Cov zinc tiv thaiv lub hauv paus hlau los ntawm kev ua raws li qhov kev cuam tshuam rau cov ntsiab lus corrosive, thiab qhov xwm txheej ntawm cov xim txheej tau ua rau ntev-ntev thiab zoo ntawm cov khoom hlau.

Qhov no dav ua rau nws siv tau rau ntau txoj haujlwm thiab kev lag luam, suav nrog kev ua liaj ua teb, hnub ci, tsheb, kev tsim kho, thiab lwm yam. Hauv qab no, peb lub hom phiaj muab cov lus qhia ntxaws ntxiv ntawm kev ua cov hlau galvanized li cas, kev ua cov galvanization sib txawv, nws cov txiaj ntsig, thiab nws siv li cas hauv cov kev lag luam no.

Dab tsi yog qhov zoo ntawm galvanized steel?

Ntau cov kev lag luam sib txawv siv galvanized steel feem ntau vim tias nws muaj xws li cov txiaj ntsig zoo rau kev lag luam kom tau txais txiaj ntsig, suav nrog:

Tsawg tus nqi pibpiv rau cov hlau feem ntau kho. Ntxiv rau, galvanized hlau yog npaj tam sim los siv thaum xa tawm. Nws tsis tas yuav tsum tau npaj ntxiv saum npoo, tshuaj ntsuam xyuas, pleev xim / pleev xim, thiab lwm yam.

Lub neej ntev zog.Nrog galvanization, ib daim ntawm kev lag luam steel vam tias yuav kav ntev dua 50 xyoo hauv qhov chaw nruab nrab, thiab tuaj yeem kav ntev dua 20 xyoo nrog dej txaus. Tsis muaj kev txij nkawm uas yuav tsum tau ua. Lub sijhawm ua haujlwm tau ntev ntawm cov hlau ua tiav cov khoom lag luam kuj tseem nce cov khoom siv tau zoo.

Kev txi anodeua kom ntseeg tau tias ib qho kev puas hlau yog tiv thaiv los ntawm kev tiv thaiv zinc txheej. Nws tsis muaj teeb meem yog tias seem steel raug cuam tshuam; cov zinc tseem yuav corrode ua ntej. Cov xim yuav corrode nyiam rau tus hlau, tsim kev tiv thaiv kev txi rau cov chaw uas tau puas.

Xeb kujlos ntawm zinc txheej. Cov ntsiab lus ntawm cov hlau hauv cov hlau tsis tshua zoo rau xeb, tab sis kev ntxiv ntawm cov zinc ua raws li cov tiv thaiv ntawm cov hlau thiab ib qho dej noo lossis cov pa. Galvanized steel muaj kev tiv thaiv zoo, suav nrog cov ces kaum ntse ntse thiab thim rov qab uas tsis tuaj yeem tiv thaiv nrog lwm cov txheej txheej, ua rau nws tiv taus kev puas tsuaj.

Cov hau kev sib txawv ntawm galvanizing

Raws li tau hais los saum toj no, muaj ntau cov txheej txheem sib txawv rau cov galvanizing steel.

Kub-Dip Galvanizing

Thawj txoj kev thiab qib thib ob rau galvanization yog kub-dip galvanizing. Cov txheej txheem zoo ib yam li lub npe pom zoo! Hauv cov qauv no, cov hlau los yog cov hlau xaim rau hauv cov pas dej uas muaj roj xeb uas yog cov xim kub uas tswj qhov kub txog ib puag ncig 860 ° F (460 ° C). Chav da dej molten no pib kev sib txuas ntawm cov xim hlau sib txuas ntawm cov zinc thiab txais hlau. Tom qab cov hlau rub tawm hauv da dej, nws hnov ​​mob los tiv thaiv huab cua, thiab cov ntshiab zinc sib tov nrog oxygen kom tsim tau zinc oxide. Cov zinc-oxide ntxiv rau cov pa roj carbon dioxide thiab tsim cov zinc carbonate, uas ua rau cov xim kawg tiv thaiv ntawm cov khoom siv. Cov cim qhia txog cov xim kub uas tsis pom qhov kub yog qhov muaj lub ntsej muag zoo li cov duab ci nyob saum npoo, qee zaum hu ua "spangle."

Qhov kub-dipped galvanizing txoj kev yog qhov kev xaiv pheej yig uas tuaj yeem tua tau sai ntawm ob qho yooj yim thiab cov qauv duab.

Cov khoom siv tshiab coated tuaj yeem ua haujlwm thiab machined hauv kev zoo ib yam li cov ntaub ntawv tsis siv tau. Galvanized steel tuaj yeem siv rau hauv cov ntawv thov kub siab txog 392 ° F, tab sis siv rau hauv qhov kub tshaj li theem ntawd yuav ua rau zinc-carbonate txheej tev tawm.

Galvannealing

Galvannealing yog qhov tshwm sim ntawm kev sib txuas ntawm cov annealing thiab kub-dip galvanizing cov txheej txheem nyob rau hauv thiaj li yuav tsim tshwj xeeb lo rau ntawm cov hlau. Cov txheej txheem ntawm galvanization yog ua los ntawm kub-ntsw thiab instantaneous annealing, uas tsim cov matte grey tiav.

Galvannealed steelis ua cov zinc-iron alloy khoom, qhov twg lub hauv paus hlau yog coated los ntawm txheej txheem kub-dip, tom qab ntawd ua kom sov rau inlo alloying ntawm molten zinc txheej thiab cov hlau. Qhov tiav tiav yog npub matte nto. Galvannealed steel yog qhov zoo rau kev siv vuam vuam thiab saum npoo zoo heev rau cov xim pleev xim.

Uantej-galvanizing

Kuj zoo ib yam li cov kub-dip galvanizing txheej txheem, tab sis ua rau theem thawj theem ntawm kev tsim khoom. Ua ntej-galvanizing yog txheej txheem uas yuav yob cov ntawv hlau los ntawm tus neeg sawv cev tu kom sai sai cov khoom siv rau galvanizing. Tom qab ntawd, cov hlau dhau los ntawm kev tso dej ntawm cov hlau ua kua zinc thiab tam sim ntawd tau rov ua dua. Qhov txiaj ntsig tseem ceeb ntawm cov qauv no yog qhov coils ntawm cov ntawv hlau tuaj yeem sai sai ntawm cov nplai loj nrog cov txheej txheem sib koom ua ke ntau dua li cov txheej txheem kub-tais.

Electrogalvanizing

Qhov tshwj xeeb tshaj plaws ntawm cov hau kev qhia no, electrogalvanizing tsis koom nrog ntsw cov khoom hauv vuas hlau ntawm zinc. Hloov chaw, qhov hluav taws xob tam sim no tau qhia rau cov tshuaj electrolyte uas tau thov rau cov hlau, uas txo cov zoo ices zinc ions rau zinc hlau - uas tom qab ntawd muab tso rau ntawm cov hlau zoo. Zoo li kev npaj ua ntej, qhov txheej txheem no ib txwm tau ua nyob rau thawj theem ntawm kev tsim khoom.