Txoj kev tsim cov txheej txheem kub-dip galvanized txheej yog txheej txheem ntawm kev tsim cov hlau-zinc alloy ntawm cov hlau substrate thiab txheej txheej ntshiab zinc txheej.Cov hlau-zinc alloy txheej yog tsim rau ntawm qhov chaw ntawm lub workpiece thaum lub sij hawm kub-dip plating, kom cov hlau thiab cov zinc txheej ntshiab yog ze heev.Kev sib xyaw ua ke zoo.Cov txheej txheem ntawm cov coils loj ntawmgalvanized hlautuaj yeem piav qhia yooj yim xws li: thaum cov hlau ua haujlwm tau muab tso rau hauv cov kua zinc molten, cov tshuaj zinc thiab α-hlau (lub cev nruab nrab) yog thawj zaug tsim ntawm lub interface.Qhov no yog ib qho siv lead ua los ntawm dissolving zinc atoms nyob rau hauv lub hauv paus hlau hlau nyob rau hauv ib tug khoom lub xeev.Ob lub atoms hlau yog fused, thiab qhov attraction ntawm cov atoms yog me me.
Yog li ntawd, thaum zinc ncav cuag saturation nyob rau hauv cov khoom tov, cov atoms ntawm zinc thiab hlau diffuse rau ib leeg, thiab zinc atoms diffuse mus rau hauv (los yog nkag mus rau hauv) cov hlau matrix migrate nyob rau hauv lub matrix lattice, maj mam tsim ib tug alloy nrog hlau, thiab diffuse mus rau hauv cov hlau nyob rau hauv molten zinc kua ua ib tug intermetallic compound FeZn13 nrog zinc, tog rau hauv qab ntawm lub kub-dip galvanizing lauj kaub, thiab ua zinc slag.Thaum lub workpiece raug tshem tawm los ntawm zinc dipping tov, ib tug ntshiab zinc txheej yog tsim nyob rau saum npoo, uas yog ib tug hexagonal siv lead ua, thiab nws cov ntsiab lus hlau tsis ntau tshaj 0.003%.
Kub-dip galvanizing, tseem hu ua kub-dipgalvanizing, yog ib txoj hauv kev uas cov khoom siv hlau tau muab tso rau hauv molten zinc kom tau txais cov hlau txheej.Nrog rau txoj kev loj hlob sai ntawm high-voltage fais fab kis tau tus mob, kev thauj mus los, thiab kev sib txuas lus, kev tiv thaiv kev tiv thaiv rau steel qhov chaw tau nce siab dua, thiab qhov kev thov rau kub-dip galvanizing kuj nce.Feem ntau lub thickness ntawm electro-galvanized txheej yog 5-15 μm, thaum lub thickness ntawm lub loj coil galvanized hlau txheej feem ntau yog siab tshaj 35 μm, txawm tias siab li 200 μm.Kub-dip galvanizing muaj kev tiv thaiv zoo, tuab txheej, thiab tsis muaj cov organic inclusions.
Raws li peb txhua tus paub, cov txheej txheem ntawm zinc tiv thaiv kev tiv thaiv huab cua muaj xws li kev tiv thaiv kev tiv thaiv thiab electrochemical tiv thaiv.Nyob rau hauv atmospheric corrosion tej yam kev mob, muaj ZnO, Zn (OH) 2 thiab yooj yim zinc carbonate tiv thaiv zaj duab xis nyob rau saum npoo ntawm zinc txheej, uas ua rau lub corrosion ntawm zinc mus rau ib tug tej yam.Thawj txheej ntawm cov yeeb yaj kiab tiv thaiv (tseem hu ua dawb xeb) puas lawm, thiab txheej txheej zaj duab xis tshiab yuav raug tsim.
Thaum cov zinc txheej raug mob hnyav thiab ua rau muaj kev phom sij rau cov hlau substrate, zinc yuav electrochemically tiv thaiv lub substrate, tus qauv peev xwm ntawm zinc yog -0.76V, thiab tus qauv peev xwm ntawm hlau yog -0.44V.Thaum zinc thiab hlau tsim lub micro roj teeb, zinc yog yaj raws li anode, thiab hlau tiv thaiv raws li cathode.Obviously, kub-dip galvanizing yog zoo dua li electro-galvanizing nyob rau hauv nws muaj peev xwm tiv taus atmospheric corrosion ntawm lub hauv paus hlau hlau.
Post lub sij hawm: 14-06-23