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 milmay acids iyo alkali, sidaas darteed waxa loo yaqaan amphoteric metal. Zinc isbedel yar in hawada qalalan.In hawada qoyan, dusha zinc samayn doonaa a aasaasiga ah ee zinc carbonate film.Containing sulfur dioxide, hydrogen sulfide iyo Marine jawi, caabbinta zinc caabbinta waa liidata, gaar ahaan heerkulka sare iyo huurka sare ka kooban organic acid jawi, daahan zinc waa sahlan tahay in ay noqon heerka corro. 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 dahaarka leh wakiilka ilaalinta.
Mabda'a waa in si degdeg ah oxidize dusha birta iyo alaabta birta ah si ay u sameeyaan a lakabka ilaalinta film oksaydh cufan.There waxaa jira laba hababka caadiga ah loo isticmaalo ee madow: kulaylka alkaline dhaqameed madowing iyo madow madow goor dambe at heerkulka qolka.Laakiin saamaynta heerkulka qolka madow ee steel carbon yar yahay ma wanaagsan.Waxa fiican in madow A3 steel leh alkali.Alkalescent madow waa qaybsanaan madow iyo laba qaybood oo madow madow, mar kale waxay leeyihiin qaybo madow oo madow. hydroxide iyo sodium nitrite. Heerkulka looga baahan yahay madowga waa ballaaran yahay, oo u dhexeeya qiyaastii 135 darajo Celsius ilaa 155 darajo Celsius, waxaadna heleysaa meel fiican, laakiin waxay qaadataa waqti qaar ka mid ah. Hawlgallada wax ku oolka ah, dareenka waa in la bixiyaa tayada miridhku iyo ka saarista saliidda ka hor inta aan la madoweynin shaqada, iyo saliidda passivation ka dib madowga. Tayada madow ee qaadashada alkaliinka badanaa waxay ku kala duwan tahay hababkan dareeraha ah. Habka samaynta filimka oksaydhka ee dusha birta ah si looga hortago daxalka waxaa loo yaqaan "bluing".Filimka oksaydhka ee ka sameysan dusha birta madow ka dib daaweynta "bluing", lakabka sare waa inta badan ferric oxide iyo lakabka gudaha waa ferrous oxide.
Talaabada ugu dambeysa ee farsamaynta boodhka waa daaweynta kulaylka, oo sida caadiga ah loo yaqaanno deminta, si loo kordhiyo xoogga boolalka. Si kastaba ha ahaatee, embrittlement hydrogen waxay si fudud u dhacdaa habka galvanizing bolts. daawaynta dib u kululaynta boolal-xoog-sare waa filim oksaydh ah oo xasiloon
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Waqtiga post: Seb-09-2019