Galvanizing waxaa loola jeedaa tignoolajiyada daaweynta dusha sare ee dhejinta lakabka zinc ee dusha sare ee birta, daawaha ama walxaha kale ee ujeedada quruxda iyo ka hortagga miridhku. Habka ugu muhiimsan waa galvanizing dip kulul.
Zinc waa ku milmay acids iyo alkali, sidaas darteed waxa loo yaqaan amphoteric metal. Zinc isbedel yar in hawo qalalan.In hawada qoyan, dusha zinc samayn doonaa a cufan aasaasiga ah zinc carbonate film.Containing sulfur dioxide, hydrogen sulfide iyo Marine jawi, Zinc daxalka iska caabintu waa liidata, gaar ahaan heerkulka sare iyo huurka sare ee ka kooban jawiga acid organic, daahan zinc waa sahlan tahay in la daxaloobay.The heerka electrode awoodda zinc waa -0.76v.Matrix birta, daahan zinc waxaa iska leh daahan anodic, kaas oo inta badan loo isticmaalo si looga hortago daxalka ee birta.Waxqabadkeeda ilaalinta waxay leedahay xiriir weyn oo la leh dhumucda dahaarka. The ilaalinta iyo qurxinta guryaha ee daahan zinc waxaa si weyn loo wanaajin karaa by passivation, wasakheeyey ama daahan oo leh wakiilka ilaalinta.
Mabda'a ayaa ah in si degdeg ah oxidize dusha sare ee birta iyo alaabta birta si ay u sameeyaan lakabka ilaalinta film oksaydh cufan.There waxaa jira laba hab oo caadi ahaan loo isticmaalo madow: madow kululaynta alkaline dhaqameed iyo madow madow goor dambe at heerkulka qolka.Laakiin saamaynta habka heerkulka qolka madow On birta kaarboonka hooseeya ma fiicna. Way fiicantahay in la madoobeeyo birta A3 leh alkali. Blackening Alkalescent waa la kala qaybiyaa, mar kale yeeshaan madow iyo laba midab madow. Qaybaha ugu muhiimsan ee khamriga madow waa sodium hydroxide iyo sodium nitrite. heerkulka loo baahan yahay madow ballaaran, oo u dhexeeya qiyaastii 135 darajo Celsius ilaa 155 darajo Celsius, oo waxaad heleysaa dusha sare ee wanaagsan, laakiin waxay qaadataa waqti. In hawlgalka la taaban karo, fiiro gaar ah waa in la bixiyaa tayada miridhku iyo saarista saliidda ka hor inta blackening of workpiece ah, iyo Saliida passivation immersion ka dib madowga.Tayada madowga inta badan way ku kala duwan tahay hababkanion ama oksaydhation acid. Habka samaynta filim oksaydh ah oogada birta si looga hortago daxalka waxa loo yaqaan "bluing". lakabka hoose waa ferrous oxide.
Qalabka sare ee xoogga leh ayaa guud ahaan loo adeegsadaa kala-goysyada muhiimka ah, oo ku xiran xiisad weyn iyo xiirid.Tallaabada ugu dambeysa ee farsamaynta boodhka waa daaweynta kulaylka, oo loo yaqaan 'demision', si loo kordhiyo xoogga boolal. Si kastaba ha ahaatee, embrittlement hydrogen waxay si fudud u dhacdaa habka bolts galvanizing.Hydrogen embrittlement waxaa inta badan lagu gartaa jabka daahday.Taasi waxay yaraynaysaa xoogga boolal-xoog-sare.Sidaas darteed, dusha madow ee ay soo saarto daaweynta kululaynta ee boolal-xoog-sare waa filim oksaydh ah oo deggan. ma la xiriiro walxaha daxalka ah.
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Waqtiga post: Seb-09-2019