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1. Hot-dip galvanizing of finished parts
1.1 General presentation
Anti-corrosion protection of iron with a layer of zinc obtained by immersion in a bath of molten metal first appeared towards the end of the 18th century. Prior to the introduction of the term "galvanization" by Stanislas Sorel in his patents filed with his partner Hector Ledru in 1837, the process was referred to as "zinc tinning". The term galvanization refers to the discoveries of Galvani, whose name is associated with the action of an electric current. Sorel was inspired by Davy's observations that in the Volta battery, made up of zinc and copper electrodes, one was always protected. Sorel proposed this principle for the "conservation" of iron by zinc.
Whenever long-lasting corrosion protection is required and the surface condition...
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Hot-dip galvanizing of finished parts
Continuous galvanizing of sheet metal
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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