6. Application and properties of galvanized products
6.1 Coating characteristics. Standardization
The main characteristics of the coatings to be followed are controlled according to the standards cited in the documentation. .
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Aspect
Uniform, relatively smooth, more or less shiny metallic gray coating. The appearance of darker matte areas corresponds to Fe-Zn alloy crystals emerging.
Surface crystallization (zinc flowers) can be variable.
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Zinc mass deposited
Roughly speaking, zinc thickness (µm) is equal to the coating mass deposited (g/m 2 ) divided by 7. Coating thickness ranges depend on the...
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Application and properties of galvanized products
Conclusion
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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