Galvanizing is a diffusion process.

As with all diffusion processes, the reaction between the molten zinc and the steel or iron will proceed quickly at first but will slow down as the alloy layers grow and become thicker.

Thus, continued immersion or dipping material more than once will not produce a significantly thicker coating except in the case of reactive steels.

The chemical composition of the steel The surface condition of the steel Bath immersion time Bath withdrawal rate Steel cooling rate

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