Dhuumaha birta galvanized waxaa guud ahaan loo yaqaan tuubo qabow. Waxay qabataa habka korantada oo kaliya gidaarka dibadda ee tuubada birta ayaa galvanized. Darbiga gudaha ee dhuumaha birta ah lama galvanized.
Tuubooyinka birta ah ee kulaylaha ah waxay adeegsadaan habka galvanizing kulul, iyo gudaha iyo gudaha gidaarada tuubooyinka birta waxay leeyihiin lakabyo zinc ah.

farqiga:
1. Nidaamyadu way kala duwan yihiin: daaweynta kiimikada iyo daaweynta jirka; dahaarka galvanized kulul-muquufin waa adag tahay oo aan si fudud u dhici.
2. Dahaarka kuleylka kuleylka leh ee galvanized waa qaro weyn, sidaas darteed waxay leedahay awood xoog leh oo ka hortag ah. Galvanizing (electroplating) waxay leedahay dahaar isku mid ah iyo tayada dusha sare ee wanaagsan, dhumucda dahaarkana waxay guud ahaan u dhexeeyaan dhowr microns iyo in ka badan toban microns.
3. Galvanizing-ku-kulul waa daaweyn kiimiko iyo fal-celin kiimiko ah. Galvanizing waa daaweyn jireed. Waxay kaliya ku cadaydaa lakabka zinc ee dusha sare. Ma jiro wax ku dahaadhan zinc gudaha, sidaa darteed lakabka zinc wuxuu si fudud u dhacayaa. Galvanizing kulul ayaa badanaa loo isticmaalaa dhismaha dhismaha.
4. Dhuumaha birta leh ee kulul waxay ka falcelisaa birta dhalaalaysa ee matrixka birta si ay u soo saarto lakab alloy ah, sidaas darteed isku darka matrixka iyo dahaarka.