81. Dab tsi yog qhov phom sij ntawm zinc tshauv rau kub-dip galvanizing?

Raws li kev txheeb xyuas nyob rau hauv cov zinc tshauv nyob rau hauv seem, zinc tshauv muaj tsis tsuas yog cov ntsiab lus zinc oxide tab sis kuj muaj lwm yam oxides xws li txhuas oxide, antimony oxide, chlorides, hlau, thiab acid-insoluble impurities. Cov khoom no ua rau muaj kev pheej hmoo tseem ceeb rau cov kav hlau galvanized, uas tshwm sim nyob rau hauv plaub txoj hauv kev tseem ceeb: (1) Thaum raug siab - zinc tshauv kub ntawm cov zinc kua nto, cov kav hlau yuav tsum dhau los ntawm cov hmoov tshauv ua ntej immersion, uas yuav hlawv tawm cov kuab tshuaj thiab ua rau kom tawg. (2) Cov hmoov tshauv tso cov kuab tshuaj residues. Yog hais tias cov residues ua raws li cov yeeb nkab saum npoo, lawv tsis tsuas yog tiv thaiv zinc txheej, tab sis kuj encapsulate lub ntshiab zinc txheej. Thaum cov dej noo los ntawm huab cua yog absorbed, cov chlorides react nrog dej los tsim corrosive media, accelerating corrosion ntawm cov zinc txheej ntshiab thiab ua kua muag -zoo li cov tee dej uas puas cov yeeb nkab. (3) Thaum lub sij hawm zinc kua paug, cov kuab tshuaj residues ntawm cov yeeb nkab nto nqus dej noo, ua rau muaj kev cuam tshuam hauv zos. (4) Cov hmoov tshauv muaj cov pa roj carbon monoxide los ntawm cov yeeb nkab steel pickling thiab dissolution, tsim tsis muaj qhov tsis zoo ntawm cov zinc txheej. Txawm hais tias cov hlau sab hauv-zinc alloy txheej tseem tshuav, nws dhau los ua nyias dua li cov zinc txheej nyob ib puag ncig, txo cov kev pab cuam lub neej. (5) Ntau zinc tshauv thickens cov zinc kua nto, degrading nws zoo. (6) Thaum cov kav dej tawm hauv lub lauj kaub galvanizing, cov hmoov tshauv zinc ua rau cov xim daj los yog thaj ua rau thaj chaw. Yog tsis muaj kev tu lub sijhawm sab hauv thiab sab nraud, cov pob no ua rau pom cov cim daj. Yog tias cov kav dej galvanized tau tawm ntawm lub lauj kaub galvanizing tam sim ntawd ntawm cov menyuam conveyor, zinc tshauv, vim qhov hnyav ntawm cov kav dej, yuav raug nias rau hauv cov txheej zinc ntshiab. Ua ke nrog cov kav dej 'dhia cov lus tsa suab ntawm lub conveyor, qhov no tsim ib qho kev faib tawm ntawm cov zinc tshauv daj ntawm qhov chaw. Yog tias cov pob no tseem tsis tau tshem tawm, cov kua qaub impurities (xws li chlorides) hauv zinc tshauv yuav nqus dej noo los ntawm huab cua thiab corrode galvanized txheej. Tshem tawm cov pob no ua rau pitting, thinning los yog txawm tshem tawm cov zinc txheej ntshiab, ua rau cov khoom lag luam luv luv. (6) zinc tshauv kuj muaj hlau. Thaum sib xyaw nrog cov zinc txheej ntshiab ntawm qhov chaw galvanized, nws tuaj yeem tsim cov xim daj xeb nyob rau hauv qee qhov av noo thiab ua rau cov ntawv nyeem tsis tseeb thaum kuaj, cuam tshuam qhov zoo ntawm galvanizing.