Effect of Chemical Bath Composition on Microstructure and Corrosion Resistance of Zinc Coatings by Hot Dip: A Review

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Jeanette Pamela Hernández Martínez http://orcid.org/0000-0002-8359-1058
Maribel Suárez http://orcid.org/0000-0003-0449-0417


Metal coatings are widely used methods for corrosion protection of metal alloys, the hot dip galvanizing process being one of the most industrially evolved. The objective of this work is to carry out a literature review, on the influence of the addition of alloying elements in the bathroom, on the microstructure and on the corrosion behavior of zinc coatings obtained by hot dipping technique. It was determined that the chemical composition of the galvanized baths influences the microstructural characteristics of the coatings and their corrosion behavior. The improvement of the corrosion resistance of zinc coatings is produced by the addition to the baths of elements generally more active than zinc, such as magnesium or aluminum that allow the formation of passive layers that retard the corrosive process.
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