Galvanization works by providing a barrier coating of zinc to prevent corrosive substances from reaching the underlying iron or steel. More importantly, zinc acts as a sacrificial anode. This means that zinc is more reactive than iron and will corrode preferentially, even if the coating is scratched and the iron is exposed.
Galvanization is a method of protecting iron from rusting by coating with a thin layer of
Asked in UPSC NDA 2 2023 · Topic: Metals, Minerals, Ores: Properties, Uses (Corrosion of metals: causes, mechanism (rusting), and prevention methods (galvanization, anodizing, electroplating, alloying, painting))
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