Tshaj tawm rau 2018-11-12Dacromet txheej, tseem hu ua zinc flake txheej, muaj qhov zoo dua uas tom kawg tsis tuaj yeem ua tiav piv rau cov txheej txheem electro galvanized thiab kub dip galvanizing.Zinc flake txheej muaj qhov zoo hauv qab no:
#1.External corrosion kuj
Cov tshuaj tiv thaiv electrochemical ntawm zinc, cov nyhuv shielding ntawm zinc / txhuas ntawv thiab cov nyhuv kho tus kheej ntawm chromate ua rau Dacromet txheej tiv taus corrosion thaum Dacromet txheej tau sim hauv nruab nrab ntsev tsuag.Nws yuav siv li ntawm 100 teev los etch txheej 1um, uas yog 7-10 npaug zoo dua li kev kho galvanizing ib txwm.Qhov nruab nrab ntsev tshuaj tsuag tuaj yeem kav ntev dua 1000 teev (txheej txheej nrog lub thickness ntawm 8um lossis ntau dua), thiab qee qhov ntau dua, qhov no tsis tuaj yeem ua rau cov txheej txheem galvanized thiab kub dip galvanized.
#2.Zoo heev kub tsis kam
Txij li thaum Dakoro-coated chromic acid polymer tsis muaj cov dej siv lead ua thiab lub melting point ntawm aluminium / zinc ntawv yog siab, lub txheej muaj zoo heev kub-kub corrosion kuj.Dacromet txheej muaj qhov kub thiab txias ntawm 300 ° C. Nws tuaj yeem siv tsis tu ncua ntev ntawm 250 ° C. Nws cov corrosion kuj yuav luag tsis muaj kev cuam tshuam, thiab cov zaj duab xis passivation ntawm cov txheej txheej electroplated zinc raug rhuav tshem ntawm ib puag ncig. 70 ° C, thiab corrosion kuj yog ib tug ntse poob.
#3.Tsis muaj hydrogen brittleness
Thaum lub sij hawm kev kho mob ntawm Dacromet, tsis muaj kua qaub ntxuav, electrodeposition, hluav taws xob de-oiling, thiab lwm yam, thiab tsis muaj electrochemical cov tshuaj tiv thaiv ntawm hydrogen evolution los ntawm cov txheej txheem electro-galvanizing, yog li cov khoom yuav tsis ua rau hydrogen embrittlement.Yog li ntawd nws yog tshwj xeeb tshaj yog haum rau tuav elastic qhov chaw thiab high-strength workpieces.
#4.Lub goodrecoatability
Cov tsos ntawm Dacromet txheej yog silver-grey nrog zoo adhesion rau substrate thiab ntau yam txheej.Nws tuaj yeem siv los ua cov txheej sab saum toj lossis ua cov primer rau ntau yam txheej.Cov tshuaj electrochemical tshwm sim ntawm cov hlau vim muaj qhov sib txawv.Rau galvanized txheej, ob qho tib si hlau-raws li thiab txhuas-raws li cov khaubncaws sab nraud povtseg yog electrochemically resistant thiab zoo heev txo corrosion kuj.Rau Dacromet anti-corrosion txheej, txij li thaum lub anti-corrosion yog raws li nyob rau hauv lub chromic acid passivation thiab tswj sacrificial tiv thaiv ntawm scaly zinc txheej, tsis muaj electrochemical corrosion yog generated, yog li Zn noj yog kuj suppressed corrosion ntawm Al yog suppressed.
#5.Zoo heev permeability
Cov kua dej kho Dacromet tuaj yeem nkag mus rau hauv qhov sib koom ua ke ntawm cov khoom ua haujlwm los tsim cov txheej txheem xeb.Yog tias siv txoj kev electroplating, sab hauv ntawm cov tubular cov tswv cuab tsis yog plated vim cov nyhuv shielding.Txawm li cas los xij, vim tias kev kho Dacromet yog siv los ntawm txheej thiab muaj qhov zoo permeability, nws tuaj yeem siv los txhim kho kev tiv thaiv xeb hauv thiab sab nraud.
#6.Tsis muaj kuab paug
Thaum electroplating zinc, muaj teeb meem ntawm cov dej phwj tuaj uas muaj zinc, alkali, chromic acid, thiab lwm yam, uas yuav ua rau muaj kuab paug loj.Qhov kub ntawm kub dip zinc yog siab, thiab tso tawm zinc vapor thiab HCL muaj teeb meem rau tib neeg noj qab haus huv.Feem ntau ntawm cov khoom siv hluav taws xob kub tam sim no yuav tsum tau ua kom deb ntawm nroog thiab nyob deb nroog.Cov txheej txheem Dacromet tau tsim ib thaj chaw tshiab ntawm kev tiv thaiv hlau corrosion.Vim tias kev kho Dacromet yog txheej txheem kaw, cov khoom uas tsis muaj zog thaum lub sij hawm ci yog cov dej, tsis muaj lwm yam teeb meem uas tswj tau, thiab tsis muaj kuab paug rau ib puag ncig.
Yog xav paub ntxiv txog zinc flake txheej, thov xyuam xim rau peb lub vev xaib: www.junhetec.com
Post lub sij hawm: Jan-13-2022