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5. Maintenance and reconditioning
5.1 White zinc salts
Zinc exposed to the atmosphere naturally reacts with ambient elements: humidity, oxygen, carbon dioxide, etc., to form a "patina". In terms of appearance, this translates into a gradual reduction in the metallic lustre of the surface. The layer thus formed is insoluble and adherent, and provides additional protection to the coating.
However, in the presence of stagnant water, the build-up of this layer is thwarted and whitish stains quickly form, generally with poor adhesion and no protection.
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Maintenance and reconditioning
Painting galvanized steel
Bibliography
Websites
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IZA (International Zinc Association)
IZA was founded in 1991 by a group of the world's leading zinc producers. Its mission is to collect data, conduct studies and research, and communicate on zinc.
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EGGA (European General Galvanizers Association)
Standards and norms
- Hot-dip galvanizing of finished cast-iron and steel products – Specifications and test methods - NF EN ISO 1461 - juillet 2009
- Zinc coatings – Guidelines and recommendations for corrosion protection of iron and steel in buildings – Part 1: General design principles and corrosion resistance - NF EN ISO 14713-1 - mars 2010
- Steel products – Requirements for hot-dip galvanizing steel components - NF A...
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