Types Of Galvanizations
There is a wide variety of galvanization types for corrosion protection. Each of these types has its unique performance and characteristics.
Following is a brief description of the various types of galvanizations.
Hot-Dip Galvanization
Hot-dip galvanization is the most widely used method of galvanization. Just as its name suggests,
It involves the dipping of the steel in molten zinc.The pool of molten zinc often maintains a temperature of about 860°F (460 °C).After proper cleaning of the base metal chemically, it gets fluxed to eliminate residual oxides.
A metallurgical bond begins to form between the zinc and the intended metal. After pulling the metal from the bath, the pure zinc mixes with oxygen from the atmosphere to form zinc oxide. Then, the zinc oxide reacts with carbon dioxide to form zinc carbonate. The zinc carbonate makes the final coating on the base metal.
Electro Galvanization
Unlike the hot-dip method, this type does not use a molten zinc bath. Rather, It uses an electrical current in an electrolyte solution to transfer the zinc ions into the metal. The positively charged zinc ions are reduced electrically and deposited on the charged material. It offers the benefit of precise and uniform coating thickness.
Specification And Size | |||||||
CNS 1244 2013 | JIS G 3302 2019 | ASTM A653M 2017 | AS1397 2011 | EN 10346 2015 | |||
Width | 1000-4000mm,etc | ||||||
Length | 2000mm, 2438mm, 3000mm, 3500,6000mm,12000mm,or rolled,etc etc | ||||||
Specifications | Hot-rolledBase | Cold-rolled Base: SGCC | Hot-rolled Base: SGHC | Cold-rolled Base: SGCC | DS | G1~G3 | DX51-52-53D |
Thickness of Base Steel (mm) | 1.2~4.60 | SGCD1~3: 0.27~2.0mm SGCC/SGC: 0.19~2.0mm | 1.2~4.60 | SGCC,SGC340: | DS: 0.27~2.0mm; | G1: | DX51D: |
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