Galvanized steel tau siv rau yuav luag 2, 000 xyoo vim nws tsis muaj peev xwm ua tau ntev heev thiab tiv thaiv xeb.Kub dipped galvanized hlauthiab electroplated galvanized steel yog tsim los ntawm ntau txoj kev thiab lawv cov zinc galvanized coatings corrode txawv kiag li. Kawm txog cov txheej txheem galvanizing no (ntawm no) thiab yuav ua li cas zinc corrosion txawv ntawm lawv (ntawm no).
Yog lawm, galvanized steel tsis kam rau xeb corrosion nyob ntawm ntau hom thiab tuab ntawm kev tiv thaiv galvanized zinc txheej, tab sis hom corrosive ib puag ncig kuj yog qhov tseem ceeb.
Cov yam ntxwv uas xeb thiab corrode galvanized steel:
Relative humidity tshaj 60%
Sodium chloride (ntsev) hauv dej los yog cua
Ib puag ncig ntub lossis ntub dej
Nce nyob rau hauv qhov kub thiab txias thaum ua ke nrog corrosive yam xws li av noo thiab muaj kuab paug
Cov kua qaub; tshwj xeeb yog sulfur acids uas tsim los ntawm (1) hydrogen sulfide - los ntawm volcanoes, kub springs, natural gas, thiab dej phwj gas - thiab (2) sulfur dioxide muaj kuab paug nyob rau hauv lub nroog.
Muaj zog Alkalis
Plasters thiab cements (tshwj xeeb Portland cements) muaj chlorides thiab sulfates
Acid rainwater ntws los ntawm lub ru tsev nrog ntoo shingles
Moss thiab lichen
Kev sib cuag ntawm cov khoom galvanized thiab tooj liab, hlau ntshiab, lossis hlau ua rau galvanic corrosion. Galvanic (electrochemical) corrosion yog cov tshuaj tiv thaiv electrolytic corrosion ntawm zinc txheej thiab cov hlau tsis sib xws thaum muaj cov electrolyte xws li nag, dej lwg, pos huab lossis condensation.
Cov khoom noj muaj kua qaub thiab dej qab zib (yog galvanized hlau zoo rau zaub mov?)
Galvanized steel muaj qhov ua haujlwm zoo rau:
Pob zeb
Mortar
Coj
Tin
Zinc
Aluminium
Galvanized steel yog corrosive rau tag nrho cov hlau tsuas yog txhuas, tin, zinc thiab txhuas.
Txawm hais tias nws tsis kav ntev, galvanized steel yog cov hlau tsis sib xws nrog corrosion-resistant hlau. Txawm li cas los xij, nws tsim nyog sau cia tias siv cov txheej txheem tiv thaiv xws li xim rau galvanized steel yuav txo cov teeb meem tshwm sim los ntawm corrosion ntawm zinc txheej tiv thaiv.
