Raws li txoj kev sib txawv galvanizing, cov txheej txheem ntau lawm thiab cov nyiaj galvanizing, nws tau muab faib uakub-dip galvanized steel ntawv(GI) thiab electrolytic galvanized steel ntawv (EG). Muaj qhov sib txawv loj hauv lawv cov yam ntxwv hauv ntau yam:
Los ntawm qhov pom ntawm qhov pom, qhov ci ntsa iab ntawm EG yog qhov zoo dua li ntawm GI, tab sis los ntawm kev kho saum npoo, GI kuj tuaj yeem ua tiav qhov ci zoo heev;
Ib txheej ntawm zinc-hlau alloy tuaj yeem tsim nruab nrab ntawm galvanized txheej ntawm GI thiab steel phaj, uas tuaj yeem ua rau txheej txheej galvanized muaj zog. Txawm li cas los xij, zinc-plated txheej ntawm EG yog nyias thiab tsis tuaj yeem tsim cov zinc-hlau alloy txheej. Yog li, GI muaj qhov zoo dua los tiv thaiv corrosion thiab tiv thaiv xeb. Rau EG; galvanizing tus nqi ntawm GI tuaj yeem ncav cuag ntau dua 45 grams ib square meter, thaum lub galvanizing tus nqi ntawm EG tsuas yog txog 20 grams. Tus nqi ntawm galvanizing yuav ncaj qha cuam tshuam rau kev tiv thaiv hluav taws xob thiab oxidation tsis kam ntawm steel phaj;
Piv nrog rau EG, GI muaj zog adsorption rau electromagnetic tsis, tshwj xeeb tshaj yog tsawg zaus electromagnetic tsis. Nyob rau tib lub sijhawm, cov khoom siv no kuj muaj cov thermal dissipation thiab conductivity zoo dua, thiab tuaj yeem tiv taus cov hluav taws xob ntau zaus.
Cov electroplated yog ci li mercury, thaum kub-plated sawv daws yuav dub. Zinc yog yooj yim soluble nyob rau hauv acid thiab alkali, yog li nws yog hu ua amphoteric hlau. Zinc tsis tshua hloov hauv huab cua qhuav. Nyob rau hauv huab cua ntub, qhov ntom ntom zinc carbonate zaj duab xis yuav raug tsim rau saum npoo ntawm zinc. Nyob rau hauv sulfur dioxide, hydrogen sulfide thiab marine cua, zinc muaj tsis zoo corrosion kuj. Tshwj xeeb tshaj yog nyob rau hauv high-humidity thiab high-temperature atmospheres uas muaj cov organic acids, galvanized txheej yog yooj yim corroded.
Tus qauv electrode ntawm zinc yog -0.76V. Rau cov hlau, cov txheej tshiab yog txheej anodic. Nws yog tsuas yog siv los tiv thaiv corrosion ntawm hlau, thiab nws cov kev tiv thaiv kev ua tau zoo yog ze rau cov txheej.
Qhov txawv ntawm electro-galvanizing thiab kub-dip galvanizing:
1. Lub thickness yog txawv, electro-galvanized zinc txheej yog thinner, thiab kub-dip galvanized zinc txheej yog thicker (ntau thicker);
2. Cov tsos yog txawv, cov tsos ntawm electro-galvanized yog du thiab ci, thaum cov tsos ntawm kub-dip galvanized yog ntxhib thiab tsis zoo luster;
3. Daim ntawv thov ib puag ncig yog txawv, electro-galvanizing yog siv nyob rau hauv cov xwm txheej, thiab kub-dip galvanizing yog siv rau sab nraum zoov.
