Wararka

Sidee saxan birta midabka leh u gaartaa ka-hortagga daxalka? Saxan bir ah oo dahaarka leh, oo sidoo kale loo yaqaan saxan bir ah oo dahaarka leh, ayaa ah natiijada ficilka la isku daray ee daahan, lakabka daawaynta ka hor, primer, iyo topcoat. Waxaan ugu yeernaa "afar ka mid ah nidaamka ka hortagga daxalka ee saxan birta midabka leh". Boodhkayaga midabka leh wuxuu ka samaysan yahay noocyo kala duwan oo dahaar ah waxaana lagu dahaadhay 5 qaybood iyo 48 geeddi-socod, oo leh sifooyin liddi ku ah miridhku.
Iska caabbinta daxalka iyo iska caabbinta sii luminaysa ee waarta.

Sideen ku gaari karnaa ka-hortagga daxalka ee taarikada birta midabka dahaarka leh? Saxan bir ah oo dahaarka leh, oo sidoo kale loo yaqaan saxan bir ah oo dahaarka leh, ayaa ah natiijada ficilka la isku daray ee daahan, lakabka daawaynta ka hor, primer, iyo topcoat. Waxaan ugu yeernaa "afar ka mid ah nidaamka ka hortagga daxalka ee saxan birta midabka leh".
Dahaarka saxan bir midabka ah ayaa ka ciyaara door allabari ka-hortagga daxalka. Si fudud loo dhigo, waxay kordhisaa nolosha adeegga ee saxanka birta iyadoo si joogto ah u cunaysa daahankeeda. Dabcan, nooca, tayada, iyo dhumucda dahaarka ayaa ah qodobbada muhiimka ah ee dhererka wakhtiga isticmaalka daahan. Taarikadayada birta ah ee dahaarka leh waxay inta badan isticmaalaan galvanized, aluminium zinc, aluminium galvanized magnesium iyo taarikada kale ee dahaarka leh ee ka soo baxa dhirta birta ee waaweyn ee gudaha, kuwaas oo leh awood sare iyo iska caabin ka fiican.
Aynu ka hadalno lakabka daawaynta ka hor mar kale. Tani waa qayb muhiim ah oo ka mid ah ka-hortagga daxalka ee taarikada birta midabka, taas oo inta badan la iska indhatiro. Lakabka daawaynta ka hor, oo sidoo kale loo yaqaan lakabka passivation, wuxuu u baahan yahay isticmaalka xalalka passivation sida fosfat ama chromate si loo dhaafo dusha sare ee substrate ka hor dahaadhka midabka. Tani kaliya ma kordhinayso adhesion ee daahan, laakiin sidoo kale waxay door ka ciyaareysaa iska caabinta daxalka. Cilmi baaris ayaa muujisay in tijaabada iska caabinta buufinta milixda ee dhexdhexaadka ah ee taarikada midabka galvanized, heerka wax ku biirinta lakabka daawaynta ka hor tayada uu gaaro in ka badan 60%.
Aan mar kale ka hadalno aasaaska. Dhinaca kale, furaha ayaa door ka ciyaara kordhinta adhesion ee daahan. Ka dib marka filimka rinjiga ah la maro, kama go'i doono dahaarka, ka hortagga bararka iyo goynta dahaarka. Dhanka kale, sababtoo ah joogitaanka midabada si tartiib tartiib ah sida chromates ee asaasiga ah, waxay dhaafi kartaa anode-ka waxayna hagaajin kartaa iska caabbinta daahan ee daahan.

Ugu dambeyntii, aan ka hadalno topcoat. Quruxda ka sokoow, jaakad dusheeda ayaa badiyaa u adeegta si ay u xannibto iftiinka qorraxda ugana hortagto waxyeellada UV ee dahaarka. Ka dib markii topcoat uu gaaro dhumuc gaar ah, waxay yareyn kartaa jiilka micropores, sidaas darteed gaashaanka dhexgalka ee warbaahinta daxalka, yaraynaysaa biyaha iyo ogsijiin permeability ee daahan, iyo ka hortagga daahan daahan. Iska caabbinta UV iyo cufnaanta dahaarka kala duwan way kala duwan yihiin, iyo nooca isku midka ah, dhumucda filimka rinjiga ayaa ah arrin muhiim ah oo saameeya daxalka. Looxyada midabkayaga dahaarka leh waxaa lagu sameeyaa iyadoo la dooranayo noocyo kala duwan oo dahaar ah kuwaas oo lagu daaweeyay heerkul sare, taasoo keentay iska caabin sare oo daxalka ah iyo waxqabadka ka hortagga gabowga oo waara.