1.Vim li cas koj tsis tuaj yeem thov cov xim ncaj qha?
Cov adhesion tsis zoo: Cov xim zoo ib yam tsis tuaj yeem ua kom ruaj khov rau cov zinc du nto.
Saponification cov tshuaj tiv thaiv: Zinc plating txheej yog alkaline thiab yuav chemically reacts (saponification) nrog cov oily Cheebtsam nyob rau hauv cov roj -raws li cov xim, tsim ib tug xab npum- zoo li cov khoom uas ua rau cov xim zaj duab xis soften thiab tev tawm.
Qhov sib txawv ntawm kev tiv thaiv cathodic: Thaum khawb, cov hlau raug thiab cov zinc txheej nyob ib puag ncig tsim cov galvanic ob peb, qhov twg zinc corrodes nyiam dua. Yog tias cov txheej txheem tsis sib xws, nws yuav cuam tshuam rau cov txheej txheem no thiab ua kom muaj corrosion.
2.Cov kauj ruam kho saum npoo yog dab tsi?
Ntxuav thiab Degreasing: Siv ib daim ntaub huv los yog txhuam dipped rau hauv ib qho tshwj xeeb hlau degreaser los yog diluted alkaline nqus tsev ntxhua khaub ncaws kom huv si ntxuav qhov khawb thiab ib puag ncig, tshem tawm tag nrho cov roj, plua plav, thiab impurities. Thaum kawg, yaug kom huv si nrog dej huv thiab cia kom cua qhuav tag.
Sanding thiab Roughening:
Siv cov ntawv xuab zeb zoo (piv txwv li, 180#-240#) lossis cov ntaub plaub zoo zoo los ua tib zoo xuab zeb sab hauv ntawm qhov khawb thiab thaj tsam li ntawm 2-3 cm nyob ib ncig ntawm nws.
Lub hom phiaj: Ua ntej, tshem tawm burrs thiab xoob zinc plating los ntawm cov npoo ntawm khawb; secondly, to roughen the smooth zinc surface, creating microscopic anchor points for the paint to "grip".
Kev ntxuav ntxiv: Siv daim ntaub los yog txhuam kom tshem tawm tag nrho cov plua plav tawm thaum lub sij hawm xuab zeb, ua kom lub ntsej muag huv si. Yog tias muaj, siv cov cua compressed los tshuab kom huv.
3.Yuav ua li cas xaiv ib qho tshwj xeeb primer rau daim ntawv thov?
Kev Xaiv Thawj: Phosphating Primer (piv txwv li, EPOX-ZINC Phosphating Anti- xeb xim)
Cov primer no me ntsis corrodes zinc nto thiab reacts chemically nrog cov hlau los ua ib tug muaj zog phosphating -chromate composite zaj duab xis, zoo heev txhim kho adhesion thiab tiv thaiv saponification. Nws tseem yog lub hauv paus zoo tagnrho rau topcoats.
Kev xaiv thib ob: Epoxy Zinc Yellow Primer
Muaj zinc daj chromate pigments, nws muaj qhov zoo heev adhesion rau galvanized nto thiab zoo corrosion kuj. Txawm li cas los xij, thov nco ntsoov cov kev cai ib puag ncig vim muaj cov chromates.
Yeem: Yooj Yim Epoxy Primer lossis Acrylic Metallic Primer
Qee qhov siab -zoo hloov pauv epoxy lossis acrylic primers sau rau siv rau cov hlau galvanized kuj yog ib qho kev xaiv.
4.Yuav ua li cas thov lub tsho tshaj sab?
Tos kom cov primer qhuav: xyuas kom cov primer kho tag nrho (raws li cov khoom qhia).
Xaiv lub topcoat: Xaiv lub topcoat sib haum nrog koj primer. Piv txwv li:
Epoxy topcoat: Tau tshaj epoxy primers, muab zoo heev corrosion kuj thiab hardness.
Polyurethane topcoat: huab cua tsis zoo, muaj zog xim thiab gloss tuav, haum rau siv sab nraum zoov.
Acrylic topcoat: Dej-raws li, ib puag ncig tus phooj ywg, ceev- ziab, thiab nrog huab cua tsis zoo.
Txhuam: Siv 1-2 lub tsho tiv no sib npaug, npog tag nrho cov primer thiab khawb qhov chaw.
5.Dab tsi yog qee yam uas yuav tsum nco ntsoov?
Kev khawb tuaj yeem npog tau, tab sis nrog txoj hauv kev tshawb fawb: Tsuas yog npog lawv nrog cov xim tsis muaj dab tsi. Kev siv tau zoo thiab kav ntev thiab kev tiv thaiv yuav tsum muaj kev sib koom ua ke nrog rau kev kho saum npoo, ib qho tshwj xeeb primer, thiab cov coat topcoat.
Kev Nyab Xeeb Ua Ntej: Thaum xuab zeb thiab pleev xim, ib txwm hnav hnab looj tes, tsom iav, thiab daim npog ntsej muag, thiab xyuas kom muaj cua zoo hauv thaj chaw ua haujlwm.
Kev Ntsuas Me Me: Yog tias thaj chaw loj lossis koj tsis paub meej, sim ua ntej ntawm thaj chaw me me, tsis pom tseeb.