Kev soj ntsuam ntawm cov txheej txheem kho deg ntawm galvanized steel grating ua ntej tha xim

Kev soj ntsuam ntawm cov txheej txheem kho deg ntawm galvanized steel grating ua ntej tha xim

Kub-dip galvanizing (kub-dip galvanizing luv luv) nyob rau saum npoo ntawm cov hlau grating yog qhov feem ntau siv thiab ua haujlwm zoo tiv thaiv kev siv tshuab rau kev tswj ib puag ncig corrosion ntawm steel qhov chaw. Nyob rau hauv ib puag ncig atmospheric, kub-dip galvanizing txheej tau los ntawm cov cuab yeej no tuaj yeem tiv thaiv cov hlau los ntawm xeb rau ntau xyoo lossis ntau dua 10 xyoo. Rau qhov chaw uas tsis muaj qhov tshwj xeeb los tiv thaiv corrosion, tsis tas yuav tsum muaj kev kho mob tiv thaiv corrosion theem nrab (txhaj tshuaj los yog pleev xim). Txawm li cas los xij, txhawm rau txuag cov nqi khiav lag luam ntawm cov khoom siv thiab cov chaw, txo kev txij nkawm, thiab txuas ntxiv kev pab cuam lub neej ntawm steel grating nyob rau hauv ib puag ncig hnyav, nws yog ib qho tsim nyog yuav tau ua cov kev tiv thaiv theem nrab ntawm kub-dip galvanized steel grating, uas yog, siv lub caij ntuj sov txheej txheej ntawm kub-dip galvanized nto los tsim ob txheej txheej tiv thaiv corrosion.
Feem ntau, steel gratings feem ntau passivated online tam sim ntawd tom qab kub-dip galvanizing. Thaum lub sij hawm passivation txheej txheem, kev tawm tsam oxidation tshwm sim nyob rau saum npoo ntawm cov kub-dip galvanizing, uas ua si lub luag hauj lwm thiab ua yeeb yam hauv kev txhim kho cov txheej zinc. Txawm li cas los xij, rau cov hlau gratings uas yuav tsum tau coated nrog lub caij ntuj sov primer los tsim ob txheej txheej los tiv thaiv corrosion rau kev tiv thaiv, qhov ntom ntom, du, thiab cov hlau tsis muaj zog passivation zaj duab xis yog qhov nyuaj rau kev sib txuas nrog lub caij ntuj sov primer tom ntej, ua rau ua rau ntxov ntxov bubbling thiab shedding ntawm cov organic txheej thaum lub sij hawm kev pab cuam, cuam tshuam nws cov nyhuv tiv thaiv.
Txhawm rau txhawm rau txhim kho kev ua haujlwm ntev ntawm cov hlau gratings kho nrog kub-dip galvanizing, nws yog feem ntau tuaj yeem ua cov txheej txheem organic tsim nyog rau nws qhov chaw los tsim cov txheej txheem tiv thaiv kev tiv thaiv. Muab hais tias qhov kub-dip galvanized txheej ntawm cov hlau grating yog tiaj, du, thiab tswb-puab, lub zog sib txuas ntawm nws thiab cov txheej txheem txheej tom ntej tsis txaus, uas tuaj yeem yooj yim ua rau bubbling, shedding, thiab ntxov ntxov tsis ua hauj lwm ntawm txheej. Los ntawm kev xaiv cov primer tsim nyog los yog cov txheej txheem pretreatment tsim nyog, lub zog sib txuas ntawm zinc txheej / primer txheej tuaj yeem txhim kho, thiab kev tiv thaiv ntev ntev ntawm kev tiv thaiv kev sib xyaw tuaj yeem ua haujlwm.
Cov thev naus laus zis tseem ceeb uas cuam tshuam rau kev tiv thaiv kev tiv thaiv ntawm kub-dip galvanized steel grating nto tiv thaiv txheej txheej kuj yog kev kho deg ua ntej txheej. Sandblasting yog ib qho ntawm feem ntau siv thiab txhim khu kev qha saum npoo kev kho mob rau steel grating txheej, tab sis vim tias qhov kub-dip galvanized nto kuj yog mos, ntau sandblasting siab thiab xuab zeb particle loj tuaj yeem ua rau poob ntawm galvanized txheej ntawm steel grating. Los ntawm kev tswj cov tshuaj tsuag lub siab thiab cov xuab zeb particle loj, nruab nrab sandblasting rau saum npoo ntawm kub-dip galvanized steel grating yog txoj kev kho saum npoo zoo, uas muaj cov txiaj ntsig zoo ntawm cov khoom ntawm primer, thiab lub zog sib txuas ntawm nws thiab kub-dip galvanized txheej yog ntau dua 5MPa.
Siv lub cyclic hydrogen primer uas muaj zinc phosphate, qhov adhesion ntawm zinc txheej / organic primer yog qhov tseem ceeb tshaj 5MPa yam tsis muaj sandblasting. Rau saum npoo ntawm kub-dip galvanized steel grating, thaum nws tsis yooj yim rau siv sandblasting nto kho, thaum ntxiv cov organic txheej yog txiav txim siab tom qab, xaiv cov phosphate-muaj primer, vim phosphate hauv primer pab txhim kho cov adhesion ntawm cov xim zaj duab xis thiab txhim khu kev tiv thaiv corrosion.
Ua ntej cov primer siv rau hauv txheej txheej, kub-dip galvanized txheej ntawm steel grating yog passivated los yog tsis passivated. Lub pretreatment tsis muaj kev cuam tshuam tseem ceeb rau kev txhim kho qhov adhesion, thiab cawv so tsis muaj kev txhim kho pom tseeb ntawm kev sib txuas ntawm lub zog ntawm zinc txheej / primer.