Habka samaynta lakabka galvanized-ku-kulul waa habka samaynta daawaha birta-zinc ee u dhexeeya substrate-ka birta iyo lakabka zinc ee saafiga ah ee dibadda.Lakabka daawaynta birta-zinc ayaa lagu sameeyay dusha sare ee shaqada inta lagu jiro dajinta kulul, si birta iyo lakabka zinc ee saafiga ah ay aad ugu dhow yihiin.Isku dhafka wanaagsan.Habka gariiradda waaweyn eesilig galvanizedwaxaa si fudud loogu sifayn karaa sida: marka birta birta lagu shubo dareeraha zinc la dhalaaliyay, xal adag oo zinc iyo α-iron ah (xarunta jidhka) ayaa marka hore laga sameeyay interface-ka.Kani waa kareem ku samaysmay kala diri atamka zinc ee birta saldhigeedu yahay xaalad adag.Labada atom ee birta ah waa isku dhafan yihiin, soo jiidashada u dhaxaysa atamka waa mid yar.
Sidaa darteed, marka Zinc gaadho saturation ee xalka adag, atamka zinc iyo birta isku firdhiyaa midba midka kale, iyo atomamka zinc ee ku firidhsan (ama dhex galaan) matrix birta u haajiraan ee shabagga matrix, si tartiib tartiib ah u sameeyaan daawaha leh birta. oo ku kala firdhiso Birta ku jirta dareeraha zinc-ka dhalaaliyay waxay samaysaa isku-dhafan dhex-dhexaad ah FeZn13 oo leh zinc, waxay ku degtaa xagga hoose ee dheriga galvanizing-ka kulul, oo waxay noqotaa zinc slag.Marka qaybta shaqada laga saaro xalka zinc-ka, lakabka zinc saafiga ah ayaa laga sameeyay dusha sare, kaas oo ah crystal hexagonal, iyo maadada birta ee aan ka badnayn 0.003%.
Galvanizing-ku-kulul, oo sidoo kale loo yaqaan-kulul-kululgalvaning, waa hab ay qaybaha birta lagu geliyo zinc dhalaalaysa si loo helo dahaadh bir ah.Iyada oo horumarinta degdega ah ee gudbinta korantada sare, gaadiidka, iyo isgaadhsiinta, shuruudaha ilaalinta ee qaybaha birta ayaa kor u kacaya oo sarreeya, iyo baahida loo qabo galvanizing kulul ayaa sidoo kale sii kordhaya.Sida caadiga ah dhumucda lakabka elektro-galvanized waa 5-15 μm, halka dhumucda lakabka weyn ee siliga galvanized-ka uu guud ahaan ka sarreeyo 35 μm, xitaa ilaa 200 μm.Galvanizing-kululku wuxuu leeyahay dabool wanaagsan, daahan cufan, oo aan lahayn wax ka mid ah organic.
Sida aan wada ognahay, habka daxalka ka hortagga atmospheric ee zinc waxaa ka mid ah ilaalinta farsamada iyo ilaalinta korantada.Marka la eego xaaladaha daxalka atmospheric, waxaa jira ZnO, Zn (OH) 2 iyo filimada ilaalinta aasaasiga ah ee zinc carbonate ee dusha sare ee lakabka zinc, kaas oo hoos u dhigaya daxalka zinc ilaa xad.Lakabka ugu horreeya ee filimka difaaca (sidoo kale loo yaqaan miridhku cad) ayaa waxyeelo soo gaadhay, lakab cusub ayaa la samayn doonaa.
Marka lakabka zinc uu si ba'an u waxyeeloobo oo uu khatar galiyo substrate-ka birta, zinc waxa ay si elektaroonik ah u ilaalin doontaa substrate-ka, awoodda caadiga ah ee zinc waa -0.76V, iyo awoodda caadiga ah ee birta waa -0.44V.Marka zinc iyo birta ay sameeyaan batari micro ah, zinc waxaa lagu milmaa sida anode, iyo birta waxaa loo ilaaliyaa sidii cathode.Sida iska cad, galvanizing-ku-kululku way ka fiican tahay electro-galvanizing ee awoodda ay u leedahay inay iska caabiso daxalka atmospheric ee birta birta ah ee salka.
Waqtiga boostada: 14-06-23