77. Vim li cas cov kav hlau galvanized feem ntau tsis muaj zinc paj, qhov galvanized nyias cov ntawv feem ntau pom lawv?

Raws li paub zoo, galvanized steel kav feem ntau tsis pom zinc paj. Qhov no tshwm sim vim hais tias cov yeeb nkab nto yog inherently ntxhib thiab tsis sib xws. Thaum cov zinc txheej ntshiab yog muab tso rau hauv dej kub kom txias ua ntej ua kom tiav, ua ke nrog cov phab ntsa tuab ntawm cov yeeb nkab steel piv rau cov phaj, zinc immersion ntev, siab zinc molten kub, thiab cov hlau tuab - zinc alloy txheej, cov txheej txheem no cuam tshuam cov txheej txheem crystallization ntawm cov zinc txheej ntshiab. Yog li ntawd, qhov no cuam tshuam kev loj hlob siv lead ua thiab cuam tshuam kev tsim ntawm zinc paj.
Nyob rau hauv cov txheej txheem galvanizing ntawm cov kav hlau, qhov tsis muaj cov ntsiab lus hlau zoo li tin lossis antimony hauv cov zinc molten tsim tsis txaus rau zinc paj tsim. Thaum ntxiv aluminium txhawb nqa ntxhib thiab transverse crystallization, uas ua rau cov nplej zoo heev, nws tseem ua rau lub xeev cov kua dej luv luv ntawm cov zinc txheej ntshiab ntawm cov yeeb nkab nto, yog li inhibiting siv lead ua kev loj hlob thiab tiv thaiv kev tsim cov qauv zoo nkauj. Tsis tas li ntawd, yog tias cov yeeb nkab steel galvanized yog muab tso rau hauv dej kub kom txias ua ntej cov zinc txheej ntshiab solidifies thaum lub sij hawm tsim khoom, tsuas yog glossy, txheej txheej txheej yuav tsim.
Kev tsim cov ntawv hlau galvanized inherently muab cov xwm txheej zoo rau zinc paj tsim. Nrog nws cov nplaim du thiab kev koom ua ke ntawm cov khoom zoo nkauj xws li tin thiab antimony, ua ke nrog cov khoom siv nyias nyias thiab cov thermal muaj peev xwm, cov txheej txheem yuav tsum muaj cov zinc immersion ntev dua thiab qis dua zinc molten kub los ua cov hlau nyias -zinc alloy txheej, zoo txo ​​kev cuam tshuam thaum lub sij hawm zinc paj. Cov txheej txheem dej pos nphuab thiab cov txheej txheem xaim mesh yog tom qab ntawd ua haujlwm rau kev tsim cov crystallization nuclei, ua kom tsim tau cov paj uas xav tau zinc.