Raws li txoj cai, txheej txheej muaj ob lub luag haujlwm tseem ceeb: kho kom zoo nkauj thiab kev tiv thaiv uas yog qhov tseem ceeb ntawm kev lag luam. Cov txheej txheem ua haujlwm tuaj yeem siv los hloov cov khoom ntawm lub substrate, xws li adhesion, wetability, corrosion resistance, los yog hnav tsis kam. Hauv kev lag luam steel, xim txheej lossis hmoov txheej feem ntau tiv thaiv cov yeeb nkab steel los ntawm corrosion, nrog rau kev tuav cov yeeb nkab zoo nkauj.
Cov xim thiab lacquers yog ob hom khoom loj uas siv rau txheej txheej hauv kev siv. Technically, xim yog cov khoom siv feem ntau siv los tiv thaiv steel hauv lub zeb. Xim tshuab rau cov qauv steel tau tsim ntau xyoo los ua raws li kev cai lij choj ib puag ncig kev lag luam thiab teb rau cov kev xav tau los ntawm tus choj thiab cov tswv tsev rau kev txhim kho kev ua haujlwm ntev. Txhua txheej 'txheej txheem' nyob rau hauv ib qho kev tiv thaiv muaj ib tug tshwj xeeb muaj nuj nqi, thiab cov sib txawv yog siv nyob rau hauv ib tug tshwj xeeb ib theem zuj zus ntawm primer raws li intermediate / tsim lub tsho tiv no nyob rau hauv lub khw, thiab thaum kawg lub finish los yog saum lub tsho tiv no nyob rau hauv lub khw los yog nyob rau hauv lub site. . Hmoov txheej kuj yog dav siv rau txias dov steel raj nrog qhuav hmoov xim rau ib qho hlau rau kev tiv thaiv nto. Nyob rau hauv ib txwm ntub dej daim ntawv thov txheej txheej yog raug tshem tawm nyob rau hauv ib tug ua kua nqa khoom uas evaporates mus rau hauv cov huab cua tawm hauv lub txheej tiv thaiv qhov chaw. Ib qho hmoov coated yog ntxuav thiab cov hmoov txheej yog electrostatically them thiab txau rau ntawm cov khoom yuav tsum tau coated. Tom qab ntawd cov khoom yog muab tso rau hauv qhov cub qhov twg cov hmoov txheej hmoov yaj los ua ib zaj duab xis tas mus li.
Yog tsis muaj txheej tiv thaiv, hlau lossis hlau yog ib qho yooj yim los tsim xeb - txheej txheem hu ua corrosion. Txhawm rau tiv thaiv qhov no, steel yeeb nkab manufacturers galvanize steel kav los ntawm txheej lawv nrog ib txheej tuab ntawm zinc. Lawv muab cov kav dej tso rau hauv lub vat ntawm cov hlau molten los yog siv cov txheej txheem electroplating. Ua ntej xa cov kav dej, cov chaw tsim khoom feem ntau coated cov hlau galvanized nrog roj rau retard cov tshuaj tiv thaiv zinc nrog cov cua. Thaum cov roj txheej no hnav tawm, cov tshuaj tiv thaiv ntawm zinc nrog oxygen tsim cov yeeb yaj kiab zoo nkauj uas hloov cov xim ntawm cov hlau los ntawm grey mus rau qhov tsis txaus nyiam dawb-grey. Thaum kub dipping galvanized steel yeeb nkab xav tau kev importing, hom yeeb nkab no feem ntau muaj ib zaj duab xis passivator uas tiv thaiv cov hlau los ntawm corrosion nyob rau hauv ib puag ncig ntsev-dej thaum hlau hla hiav txwv lossis dej hiav txwv ntawm cov nkoj thauj khoom.
Niaj hnub no, ntau qhov kev vam meej tau ua tiav los ntawm kev siv cov txheej txheem txheej txheem los muab kev tiv thaiv kev tiv thaiv kev tiv thaiv kev tiv thaiv sab nrauv, sab hauv-hull tso tsheb hlau luam hauv cov roj tankers, nkoj hull, cov kav dej hauv qab, thiab lwm yam. Cov txheej txheem tshiab tau tsim los kho thiab tiv thaiv pob zeb thiab hlau. cov qauv hauv ntug dej hiav txwv thiab ntug dej hiav txwv, xws li cov txheej txheem tag nrho-polymer encapsulation los kho thiab tiv thaiv cov qauv hauv thaj tsam txaws. Lub sij hawm ntev ntawm cov txheej txheem lossis cov kev xav tau ntawm txhua daim ntawv thov tuaj yeem paub tseeb los ntawm kev tiv thaiv corrosion, los ntawm cov txheej txheem los yog kev sib xyaw ntawm cathodic tiv thaiv thiab txheej txheej.
Xa koj cov lus rau peb:
Post lub sij hawm: May-03-2018
