86. Cov kev kho ua ntej - cuam tshuam dab tsi ntawm qhov adhesion ntawm txheej galvanized?

Thaum ua ntej-kev kho mob siv txoj kev "kua (melting)", cov yeeb nkab steel nto yuav tsim ntau yam teeb meem: cov hlau oxide seem ntawm cov kua qaub ntxuav tsis txaus, hydrogen ion tsub zuj zuj los ntawm ntau tshaj -acidizing, tshem tawm tsis tiav ntawm cov roj paug, hlau ntsev adhesion, tsis huv hauv cov pa roj carbon monoxide, tsis muaj cov pa roj carbon monoxide, thiab cov pa roj carbon monoxide ntau dhau. hlau cov ntsiab lus nyob rau hauv cov kuab tshuaj, kuab impurities, hnyav stagnation, hnyav hlawv- tawm, ib feem ntawm cov kuab tshuaj tshem tawm, thiab hnyav drying deficiency. Cov yam tseem ceeb no ua rau cov plating plating lossis pseudo-zinc txheej nrog tsuas yog zinc txheej ntshiab thiab tsis muaj cov hlau hauv qab-zinc alloy txheej, thaum kawg cuam tshuam kev ua haujlwm adhesion.
Thaum ua ntej- kev kho mob siv "kev tiv thaiv roj txo txoj kev," cov yeeb nkab steel nto yuav tsum tau ua kom txo qis kom ua tiav cov hlau ntshiab ua ntej zinc cov tshuaj tiv thaiv ntawm cov hlau-zinc alloy txheej. Ua tsis tau zoo tswj kev tiv thaiv roj muaj pes tsawg leeg, dew point, kub kub, thiab sealing tej yam kev mob tej zaum yuav ua rau tsis txaus oxidation los yog txo, ua rau ib tug plam txheej los yog ib tug zinc - tsuas yog txheej tsis muaj txheej txheem alloy. Qhov no tuaj yeem ua rau tawg lossis tawg thaum khoov lossis ua haujlwm txias. Yog li ntawd, zoo ib yam li "flux method," pluag adhesion dhau los. Nyob rau hauv kub -dip galvanizing siv "flux method," ammonium chloride flux ntawm zinc molten nto yuav ua rau kom brittleness thiab txheej detachment.