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The Galvanizing Process Galvanizing In this step, the material is completely immersed in a bath consisting of a minimum of 98% pure molten zinc. The bath chemistry is specified by the American Society for Testing and Materials (ASTM). The bath temperature is maintained at about 850? F (454? C). Fabricated items are immersed in the bath long enough to reach bath temperature. The articles are withdrawn slowly from the galvanizing bath and excess zinc is removed by draining, vibrating and/or centrifuging. The chemical reactions that result in the formation and structure of the galvanized coating continue after the articles are withdrawn from the bath, as long as these articles are near the bath temperature. The articles are cooled in either water or ambient air immediately after withdrawal from the bath. |
