La dhajiyay 2018-12-22Xalka daawaynta Dacromet waa xal aqueous ah oo kala firdhisan oo ka kooban jajabyo zinc ah, flakes aluminium, chromic acid anhydrous, ethylene glycol, zinc oxide, iwm, oo leh dhexroor afar ilaa shan mikromitir iyo dhumucdiisuna tahay afar ilaa shan mikromitirKa dib markii workpiece ee la daweeyay la quusiyo ama lagu buufiyo dareeraha daaweynta, dusha sare ee workpiece waxaa si khafiif ah u dheggan dareere daahan, ka dibna kulayl ilaa 300 ° C foornada daaweynta si ay u sameeyaan chromium hexavalent ee lakabka daahan. sida ethylene glycol waa la dhimay si ay u sameyso biyo-aan-milmi karin, amorphous nCrO3 iyo mCr2O3.Ficilkeeda hoostiisa, xaashida zinc iyo xaashida aluminiumku way isku xidhan yihiin, iyo daraasiin lakab ah ayaa lagu dhejiyay dusha sare ee shaqada.Dahaarka, oo ay weheliyaan aashitada chromic-ka anhydrous ee daahaarka Dacromet, waxay oksidhis ku sameysaa dusha shaqada si kor loogu qaado ku dhejinta dahaarka dusha sare ee shaqada.
Habka ka hortagga miridhku ee daahan Dacromet guud ahaan waxaa loo arkaa inay yihiin kuwan soo socda:
1. Ilaalinta naf-hurnimada la xakameeyey ee budada zinc;
2. Aashitada chromic waxay samaysaa filim oxide cufan oo ku yaal dusha sare ee shaqada oo aan si fudud u daxaleynin inta lagu jiro farsamaynta;
3. Dahaarka oo ka kooban tobanaan lakab oo zinc iyo aluminium ah ayaa sameeya shaqo ilaalin ah, taas oo kordhinaysa imaatinka qofka soo galay dusha sare ee shaqada.
Waddadii soo martay.Electro-galvanizing si toos ah ayaa loogu dahaadhay lakabka zinc ee dusha sare ee birta.Daxalka hadda waa sahlan tahay in lagu dhex qulqulo lakabyada dhexdooda.Gaar ahaan deegaanka buufinta milixda ah, hadda ilaalinta aad ayaa loo yareeyaa si ay zinc uga dhigto mid fudud in la isticmaalo.miridhku cad waxa la soo saaraa marxaladda hore ee habaynta.Ama miridhku cas.Daawaynta Dacromet waxay ka kooban tahay qayb ka mid ah xaashida zinc oo lagu daboolay xeryahooda aashitada chromic, korantadu waa dhexdhexaad, sidaas darteed waxay leedahay iska caabin aad u fiican.Waraaqaha zinc ee ay daboolan yihiin lakabyada ayaa la dulsaaray si ay u sameeyaan gaashaan, iyo heerka roobabka zinc waa la xakameynayaa xitaa tijaabada buufinta cusbada.Waxaa intaa dheer, maadaama xarunta chromic acid ee filimka qalalan ee Dacromet aysan ku jirin biyo crystal ah, caabbinta heerkulka sare iyo caabbinta daxalka ka dib kuleylka ayaa sidoo kale wanaagsan.
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Waqtiga boostada: Jan-13-2022