Wararka

Duubista
Dhumucda dahaarka ayaa ah xaaladda ugu muhiimsan ee dammaanadda iska caabinta daxalka.Dhumucdiisuna way sii weynaataa, way sii fiicnaanaysaa iska caabbinta daxalka, taas oo lagu caddeeyey tijaabooyin badan oo la dardargeliyey iyo tijaabooyinka soo-gaadhista sanka.
Sida hoos ka muuqata:

Taarikada birta midabka ee ku salaysan (aluminium) taarikada zinc, dhumucda dahaarka ayaa inta badan saameeya waxqabadka daxalka ee taarikada midabka midabka.Inta uu khafiifka yahay substrate-ka, ayaa dhumucdiisuna ay sii korodhaa lakabka zinc, waxaana ka sii wanaagsan iska caabinta daxalka ee goynta.Hadda waxaa caalami ahaan loo aqoonsan yahay in saamiga zinc ≥ 100 uu yahay ka hortag wax ku ool ah oo ka hortagaya daxalka caanka ah ee taarikada birta midabaysan.
ShahaadoQaadashada substrate 0.5mm tusaale ahaan, waxa ku jira mitir labajibbaaran ee hal dhinac waa inay gaadhaan ugu yaraan 50g.

Sida loo doorto nooca dahaarka
Doorka ugu weyn ee dahaarka ayaa ka muuqda labadaba saameynta muuqaalka iyo hawlaha ilaalinta.Midabka dahaarka waxaa loo qaybin karaa midabyo dabiici ah iyo midabyo aan dabiici ahayn, oo leh midabyo dhalaalaya iyo dhalaalaya;Midabka aan orgaaniga ahayn guud ahaan waa midab khafiif ah, laakiin sifooyinkooda kiimikaad iyo iska caabbinta UV ayaa ka sarreeya midabada dabiiciga ah.
Koofiyadaha ugu badan ee loo isticmaalo taarikada birta midabka leh waxaa ka mid ah polyester (PE), polyester silicon modified polyester (SMP), polyester adkeysiga sare (HDP), iyo polyvinylidene fluoride (PVDF).Koodh kastaa wuxuu ku habboon yahay xaalado kala duwan, waxaanan kugula talineynaa isticmaalka HDP ama PVDF marka dhaqaaluhu ogolaado.

Xulashada asaasiga ah, resin epoxy waa in la doortaa haddii adhesion iyo caabbinta daxalka la xoojiyo;Si aad u fiirsato dabacsanaan iyo iska caabin UV, dooro poliurethane primer.
Dahaarka dambe, haddii saxanka birta ah ee midabka leh loo isticmaalo sidii saxan keliya, dooro qaab-dhismeed laba-lakab ah, taas oo ah, hal lakab oo hore ah iyo hal lakab oo dhabarka ah.Haddii saxanadda birta midabkeedu dahaaran tahay loo isticmaalo sidii saxan isku-dhafan ama sandwich ah, lakabka resin epoxy ayaa dhabarka laga marinayaa.

Saamaynta dhumucda dahaarka ee nolosha adeegga
Dahaarka saxanka birta ah ee midabka leh ayaa door gaar ah ka ciyaari kara ka-hortagga daxalka, iyadoo la adeegsanayo filimka dahaarka si loo go'doomiyo walxaha wasakhaysan ee dibadda ah.Si kastaba ha ahaatee, iyadoo ay ugu wacan tahay muuqaalka yar ee filimka daahan laftiisa, weli waxaa jira daldaloolo, iyo qadar yar oo uumiga biyaha ah ee hawada ayaa weli soo galaya daboolka, taas oo keenaysa finan maqaarka ah oo ay suurtogal tahay in uu keeno filimka dahaadhka ah inuu dhaco.Wixii saxan bir ah, dhajinta
Lakabka (zinc plated ama aluminium zinc plated) ayaa saameyn weyn ku leh nolosha saxanka birta.
Dhumucda dahaarka la mid ah, dahaarka sare waa ka cufan yahay daahan aasaasiga ah, oo leh caabbinta daxalka ka wanaagsan iyo nolosha adeeg dheer.Dhumucda dahaarka, oo ku saleysan natiijooyinka baaritaanka daxalka ee khuseeya, waxaan kugula talineynaa in dahaarka hore uu ahaado 20 um ama ka badan, maadaama dhumucda filimka ku filan ay ka hortagi karto daxalka gudaha muddada ansaxnimada.
Ka hortag dhacdada daxalka (PVDF waxay u baahan tahay dhumuc dahaar ka sii dhumucdiisuna waxay tahay sababtoo ah shuruudaha nolosha oo dheer, sida caadiga ah 25 μM ama ka badan).