Metallurgical structure of the coating
Galvanized steels: surface treatment for corrosion protection

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Metallurgical structure of the coating


Galvanized steels: surface treatment for corrosion protection

Author : Ludovic NÉEL

Publication date: June 10, 2012 | Lire en français

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1. Metallurgical structure of the coating

1.1 Industrial process steps

Galvanizing is the process of creating a coating of iron and zinc alloys. The success of this metallurgical reaction depends on the quality of the surface preparation.

As with all quality coatings on steel (paint, electrolytic deposits, vacuum deposits and others), hot-dip galvanizing requires surface preparation prior to immersion in the zinc bath, aimed at eliminating as many foreign bodies as possible that could hinder the reaction (figure 1 ). Indeed, throughout the manufacturing process, the parts to be galvanized undergo various treatments or aggressions that leave traces right...

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