Thaum lub sij hawm xa hluav taws xob, tus pej thuam hlau yog ib qho tseem ceeb heev. Thaum lub sij hawm tsim cov hlau ntauwd steel cov khoom, cov txheej txheem ntawm kub-dip galvanizing feem ntau yog siv rau saum npoo los tiv thaiv cov khoom hlau los ntawm corrosion ntawm huab cua sab nraud thiab ntau qhov chaw. Kev siv cov txheej txheem kub-dip galvanizing tuaj yeem ua tau zoo los tiv thaiv corrosion. Nrog rau cov kev xav tau siab dua ntawm kev xa hluav taws xob, cov kev xav tau rau cov txheej txheem ntawm cov khoom siv galvanized steel kuj tseem siab dua.
(1) Lub hauv paus ntsiab lus ntawm kub dip galvanizing
Kub dip galvanizing, tseem hu ua kub dip galvanizing, yog ib qho ntawm cov txheej txheem zoo tshaj plaws los tiv thaiv steel substrate. Nyob rau hauv cov kua zinc, tom qab lub steel workpiece tau kho lub cev thiab tshuaj, lub steel workpiece yog immersed nyob rau hauv molten zinc nrog ib tug kub ntawm 440 ℃ ~ 465 ℃ los yog siab dua rau kev kho mob. Cov hlau substrate reacts nrog cov zinc molten los tsim ib Zn Fe kub txheej thiab ib txheej zinc ntshiab thiab npog tag nrho saum npoo ntawm steel workpiece. Qhov saum npoo galvanized muaj qee qhov toughness, tuaj yeem tiv taus kev sib txhuam thiab kev cuam tshuam, thiab muaj kev sib xyaw zoo nrog cov matrix.
Txoj kev plating no tsis tsuas yog muaj kev tiv thaiv corrosion ntawm galvanizing, tab sis kuj muaj Zn Fe alloy txheej. Nws kuj muaj zog corrosion kuj uas tsis tuaj yeem muab piv nrog galvanizing. Yog li ntawd, txoj kev plating no yog tshwj xeeb tshaj yog haum rau ntau yam muaj zog corrosive ib puag ncig xws li muaj zog acid, alkali thiab pos huab.
(2) Cov yam ntxwv ua haujlwm ntawm kub dip galvanizing
Nws muaj tuab thiab ntom ntshiab zinc txheej ntawm cov hlau saum npoo av, uas tuaj yeem zam qhov kev sib cuag ntawm cov hlau substrate nrog txhua cov hlau substrate los ntawm corrosion. Nyob rau hauv cov huab cua, ib tug nyias thiab ntom zinc oxide txheej yog tsim nyob rau saum npoo ntawm zinc txheej, uas yog nyuaj rau yaj nyob rau hauv dej, yog li nws plays lub luag hauj lwm nyob rau hauv kev tiv thaiv cov hlau matrix. Yog hais tias zinc oxide thiab lwm yam khoom nyob rau hauv cov huab cua tsim insoluble zinc ntsev, cov nyhuv anti-corrosion yog zoo tagnrho.
Tom qab kub-dip galvanizing, cov hlau muaj Zn Fe alloy txheej, uas yog compact thiab muaj qhov tshwj xeeb corrosion kuj nyob rau hauv marine ntsev pos huab cua thiab muaj cua. Vim muaj kev sib raug zoo, Zn Fe yog miscible thiab muaj zog hnav tsis kam. Vim tias zinc muaj qhov zoo ductility thiab nws cov txheej txheej alloy yog ruaj khov rau cov hlau substrate, kub-dip galvanized workpiece tuaj yeem tsim los ntawm txias xuas nrig ntaus, dov, xaim kos duab, khoov, thiab lwm yam tsis ua rau zinc txheej.
Tom qab kub galvanizing, steel workpiece yog sib npaug rau kev kho annealing, uas tuaj yeem txhim kho cov khoom siv ntawm cov hlau substrate, tshem tawm cov kev ntxhov siab ntawm cov hlau ua haujlwm thaum lub sij hawm tsim thiab vuam, thiab yog qhov zoo rau tig cov hlau workpiece.
Qhov saum npoo ntawm steel workpiece tom qab kub galvanizing yog ci thiab zoo nkauj. Ntshiab zinc txheej yog feem ntau cov yas zinc txheej hauv kub-dip galvanizing. Nws cov khoom yog qhov zoo ib yam li cov zinc ntshiab, thiab nws muaj ductility, yog li nws hloov tau.
Post lub sij hawm: Aug-26-2022
