Our country looses more than 10000 crore Rupees per annum due to metallic corrosion of iron and steel is something we need to consider seriously. Common methods such as barrier protection through painting and cathode protection are regular antidotes for fighting corrosion. But the Hot Dip Galvanizing (HDG) process is a cost -effective control process that solves most of the corrosion problems in major industrial applications. The reason for wide-spread use of HDG is the dual action of the coating in protecting the substrate As a barrier, it gives a strongly-bonded zinc coating covering the steel surface, thereby sealing it from environmental attack. As well as giving a cathode protection in which the zinc sacrifices itself in order to protect the substrate, in case of damage or minor discontinuity in the coating.
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