Qhov txheej txheem kev sib tw muaj peb theem pib: kev npaj deg, kev teeb tsa thiab kev tshuaj ntsuam.
DAWB HOM NEEG
Kev npaj deg yog qhov kauj ruam tseem ceeb tshaj plaws nyob rau hauv daim ntawv thov ntawm txhua hom coatings. Cov kev ua tsis tiav los yog tsis zoo nyob hauv qhov chaw npaj yuav ua rau pom tseeb thaum cov hlau tawm ntawm cov hlau zinc vim hais tias qhov chaw tsis huv yuav nyob tsis kho, thiab yuav tsum ua kom raug.
Caustic Cleaning - Cov kua kub alkali yog siv los tshem tawm cov khoom paug xws li cov av, cov xim pleev xim, roj thiab roj los ntawm cov hlau. Epoxies, roj los yog vuam slag yuav tsum tau muab tshem tawm ua ntej teeb meem tsis zoo, cov xuab zeb blasting los yog lwm yam tshuab txhais tau li lub tshuab kev sib tsoo lossis kev sib tsoo cov lus sib txuas.
Ua kom muaj ntau dua galvanization thickness, cov xuab zeb-blasting yog feem ntau pom zoo.
Yuav kom txo qhov tsis ua hauj lwm, peb pom zoo kom cov kev cob qhia nws siv cov dej hauv lubricant rau steel fabrication.
Pickling - Nplai thiab xeb txhua zaus raug muab tshem tawm los ntawm hlau hlau los ntawm kev siv tshuaj tua kab ntawm sulfuric acid (5-15% ntawm ntim) los yog ambient kub hydrochloric acid.
Yog hais tias lub hlau tau oxidized heev heev, ib txwm pickling yuav tsis txaus, thiab xuab zeb-blasting feem ntau yuav tsum tau.
Fluxing - Fluxing yog qhov kawg npaj cov kauj ruam hauv txoj kev teeb tsa. Fluxing tshem tawm cov oxides thiab tiv thaiv cov oxides ntxiv los ntawm kev sib sau ntawm cov hlau ua ntej galvanizing.
GALVANIZING - Hauv cov kauj ruam no, cov khoom siv tag nrho hauv ib da dej uas muaj li 98% ntshiab cov zinc zinc. Tus da dej sov yog nyob ntawm kwv yees li ntawm (440-449 C). Cov khoom siv uas tau muab pov tseg hauv lub da dej kom txog thaum lawv ncav cuag lub ntsuas da dej. Lub zinc hlau ces reacts nrog cov hlau nyob ntawm hlau hlau tsim ib cov zinc / hlau sib nqus hlau, thiab cov hlau no yog lub hauv paus rau cov hom phiaj tiv thaiv kev kub ntxhov.
TXHAJ TSHUAJ TIV THAIV - Muaj ntau hom kev kuaj lub cev thiab kuaj sim kom pom tseeb ua kom tuab, tsis sib luag, sib koom ua ke thiab pom. Khoom lag luam yog tsim raws li ntev-tsim, zoo txais, thiab pom zoo ntawm cov qauv ASTM A153 , AS / NZS 4680 , thiab JIS H8641 BS EN ISO 1461.
Nrig txog kev soj ntsuam yog feem ntau siv daws. Hauv cov tswv yim, QC cov neeg ua hauj lwm yog siv hla-hatch xyuas kev ua raws. Ntawm chav kawm, zinc meters yog feem ntau siv cov cuab yeej los xyuas lub galvanization thickness.
