Heer adag ee silig birta galvanized

Adaggu waa mid ka mid ah tusmooyinka ugu badan ee loo isticmaalo sifooyinka farsamada ee alaabta birta ah.Habka tijaabada degdega ah ee dhaqaalaha ee tijaabada adag ayaa lagu soo bandhigay warshadda siliga.Laakiin adkaanta walxaha birta ah, ma jiraan qeexitaan midaysan oo cad oo ay ku jiraan dhammaan hababka tijaabada ee gudaha iyo dibaddaba.Guud ahaan, adkaanta birta waxaa badanaa loo maleynayaa inay tahay iska caabbinta shay si ay u beddelaan balaastigga, xagashada, xirashada, ama goynta.

In hagaajinta fogaanta quusin ee weynsilig galvanized, Xawaaraha asalka ah ha is beddelin, oo go'aami wakhtiga wax lagu shubayo (1) marka loo eego T = KD, halkaas oo: T ay tahay joogtada wakhtiga wax-qabashada, qaado 4-7d waa dhexroorka fiilada birta mm, ka dibna qiyaas dhuujinta fogaansho.Iyadoo la hagaajinayo masaafada qulqulaya ee zinc, wakhtiga zinc-quqista ee siliga birta ee tilmaamo kala duwan ayaa la soo gaabiyay celcelis ahaan 5s ka hor inta aan la hagaajin.Sidan, isticmaalka zinc waa la dhimay, iyo isticmaalka zinc halkii tan oo silig birta ah ayaa laga dhimay 61kg ilaa 59.4kg.

Galvanization-ka kulul wuxuu ku jiraa kuleylinta dhalada shubka zinc, xawaaraha wax soo saarka, daahan qaro weyn laakiin aan sinnayn, dhumucda suuqa ayaa u oggolaanaysa 45 microns, ilaa 300 microns ama ka badan.Midabku waa mugdi, isticmaalka birta zinc, iyo birta matrixka si ay u sameeyaan lakabka dhexgalka, iska caabinta daxalka ayaa wanaagsan, jawiga galvanized kulul ee dibadda waa la ilaalin karaa tobanaan sano.Waxaa jira laba mabda'a oo loogu talagalay ilaalinta daahan zinc ee matrixka birta: dhinaca kale, inkastoo zinc uu ka firfircoon yahay oo si sahlan u oksijiinta marka loo eego birta, filimkeeda oksaydhku maaha mid dabacsan sida birta oxide waana mid cufan.Sameynta lakabka oksaydhka cufan ee dusha sare ayaa xannibaya oksijiinta dheeraadka ah ee zinc gudaha.

Gaar ahaan ka dib passivation ee lakabka galvanized, lakabka oxide dusha waa cufan badan, laftiisa ayaa iska caabin ah oksaydhation sare.Dhanka kale, marka lakabka dusha sare ee daahan zinc uu dhaawacmo, oo soo bandhigaya matrixka birta gudaha, sababtoo ah zinc wuu ka firfircoon yahay birta, zinc wuxuu qaadi doonaa doorka zinc anode ee allabari, zinc wuxuu oxidize doonaa ka hor birta, sidaas darteed ilaalinta lakabka birta. dhaawac kasoo gaaray.