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Danièle QUANTIN: Coordination of research centers - Innovation Research and Development Arcelor
INTRODUCTION
Hot-dip galvanizing of ferrous alloys is a coating operation involving dipping in a bath of molten zinc or zinc alloy at a temperature close to 460°C. It is applied to finished parts, sheets and wires coated by a continuous process.
Behind the generic name of hot-dip galvanizing, a wide variety of products of very different composition and structure currently exist, either because of the process itself (dipping of finished parts or continuous process), or because of the bath composition (aluminum from 0.05 to 55%, silicon, magnesium, etc.) or post-treatment (alloying, minimization of blooming, etc.). So there are hot-dip galvanizations and galvanized products.
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Hot-dip galvanizing
Hot-dip galvanizing of finished parts
Economic data
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Annual world zinc production is 9 Mt, of which more than 50% is devoted to steel production (growth of around 3% per year).
There are 550 continuous galvanizing lines worldwide, producing 70 Mt of coated steel.
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In Europe, automotive consumption will reach 8 Mt in 2005.
In Europe, 1.7 Mt/year...
Bibliography
- - Voir Recueils des Présentations aux Congrès Galvatech de 1989 (Tokyo), 1992 (Amsterdam), 1995 (Chicago), 1998 (Tokyo), 2001 (Bruxelles), 2004 (Chicago) et Intergalva : http://www.egga.com
- COUTSOURADIS (D.) -...
Theses
- - http://www.sudoc.abes.fr
- AMANI (S.) - Étude par électrochimie et par émission acoustique du décollement de couches de galvanisation sous protection cathodique - . Metz 2000.
- ...
Standardization
Tables A and B give the minimum weights and coating thicknesses according to NF EN ISO 1461, and the corrosion categories according to NF ISO 14713.
Organizations
Centre Français de l'Anticorrosion (CEFRACOR) : http://www.cefracor.org
European Galvanizers Association (EGGA) : http://www.egga.com
Galvazinc Association : http://www.galvazinc.com
...Manufacturers. Manufacturers
See the sites : http://www.galvazinc.frhttp://www.iza.comhttp://www.egga.com
Main zinc suppliers :
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