2. Galvanization reaction
Galvanization coating is not simply a deposit of zinc on the surface of steel, as paint might be. Since steel is dipped in liquid zinc, it is a metallurgical reaction of double diffusion between zinc and iron. This diffusion leads to the formation of layers of intermetallic compound alloys.
The galvanization coating is therefore composed of:
one or more layers of intermetallic compounds, depending on the nature of the bath (presence of aluminum in particular) and the technological process;
a final layer of external zinc, zinc drawn to the part's surface by capillary action.
2.1 Formation of interfacial alloys
When a steel component is...
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Galvanization reaction
Main steps in a galvanizing operation
Bibliography
Bibliography
- (1) - - http://www.egga.com
- (2) - COUTSOURADIS (D.) - Developments in zinc and zinc alloy coated sheet - . Intergalva n° 91, Barcelone, EGGA.
- ...
Standards and norms
NF EN ISO standards
- Revêtements métalliques – Revêtements de galvanisation à chaud sur métaux ferreux – Détermination gravimétrique de la masse par unité de surface - NF EN ISO 1460 - 2020
- Revêtements par galvanisation à chaud sur produits finis ferreux – Spécifications et méthodes d’essai - NF EN ISO 1461 - 2022
- Revêtements métalliques et couches d’oxyde – Mesurage de l’épaisseur – Méthode par...
Directories
See the websites: http://www.galvazinc.com http://www.galvanizingeurope.org http://www.iza.org
Main suppliers of zinc:
Economic data
Annual global zinc production exceeds 10 million metric tons, with approximately 60% of this production used for steel protection.
In Europe, approximately 7 million tons of galvanized steel are used each year in manufactured products, including:
3 Mt for the construction/building sector;
0.9 Mt for street furniture;...
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