Yuav Ua Li Cas Xim Coated Steel Phaj Achieve Anti-corrosion?

Xim coated steel phaj kuj yog xim coated steel phaj, uas yog tshwm sim los ntawm kev sib koom ua ke ntawm txheej txheej, pre-kho txheej, primer, thiab topcoat. Peb hu nws "plaub hauv ib qho kev tiv thaiv corrosion ntawm cov xim coated steel phaj". Yog li yuav ua li cas xim coated steel phaj ua tiav los tiv thaiv corrosion?
Cov txheej ntawm cov xim hlau phaj plays lub luag hauj lwm los tiv thaiv corrosion, uas tsuas yog ua kom lub neej ntev ntawm cov phaj steel los ntawm kev siv nws tus kheej txheej. Tau kawg, hom, zoo, thiab thickness ntawm cov txheej yog qhov tseem ceeb ntawm lub sij hawm ntev ntawm txheej siv. Tongmeng xim coated steel phaj tsuas yog siv galvanized, aluminized zinc, galvanized aluminium magnesium thiab lwm yam coated steel daim hlau los ntawm cov nroj tsuag loj hauv tsev, nrog lub zog ntau dua thiab zoo dua rau pitting corrosion.
Cia peb tham txog txheej txheej ua ntej kho dua. Qhov no yog ib qho tseem ceeb ntawm kev tiv thaiv corrosion rau cov xim hlau daim hlau, uas feem ntau tsis saib xyuas. Cov txheej txheem ua ntej, tseem hu ua txheej txheej passivation, yuav tsum tau siv cov txheej txheem passivation xws li phosphate lossis chromate kom passivate saum npoo ntawm substrate ua ntej xim txheej. Ntawm qhov tod tes, nws plays lub luag haujlwm hauv kev ua kom cov adhesion ntawm txheej thiab ntawm qhov tod tes, nws plays lub luag haujlwm hauv kev tiv thaiv pitting corrosion. Kev tshawb fawb pom tau hais tias nyob rau hauv qhov nruab nrab ntsev tsuag tshuaj tiv thaiv kev sim ntawm galvanized xim coated daim hlau, qhov kev pab cuam ntawm pre-kho txheej txheej zoo mus txog 60%.
Cia peb tham txog primer dua. Ntawm qhov tod tes, primer plays lub luag haujlwm hauv kev ua kom cov adhesion ntawm txheej. Tom qab cov xim zaj duab xis yog permeable, nws yuav tsis detach lub txheej, tiv thaiv nws ntawm foaming thiab ntog; Ntawm qhov tod tes, vim muaj cov pigments qeeb-tso xws li chromate hauv primer, nws tuaj yeem passivate lub anode thiab txhim kho corrosion kuj ntawm txheej.
Thaum kawg, cia peb tham txog topcoat. Ntxiv nrog rau kev zoo nkauj, topcoat feem ntau ua haujlwm los thaiv lub hnub ci thiab tiv thaiv UV kev puas tsuaj rau txheej. Tom qab lub topcoat ncav cuag ib tug tej thickness, nws yuav txo tau lub tiam ntawm micropores, yog li tiv thaiv kev nkag mus ntawm corrosive media, txo cov dej thiab oxygen permeability ntawm txheej, thiab tiv thaiv txheej corrosion. Kev tiv thaiv UV thiab qhov ntom ntom ntawm cov txheej txheej sib txawv, thiab rau tib hom txheej, zaj duab xis tuab yog qhov tseem ceeb cuam tshuam rau corrosion. Acai txheej board yog ua los ntawm cov xim pleev xim rau ntawm qhov kub thiab txias, nrog superior corrosion kuj thiab fading kuj