Zinc rich paints are paints in which the zinc powder functions as the active pigment. It is present in the dry paint film at  levels of 85-92 wt%. It is due to these high levels of zinc powder that the paint has the qualities of a metallic zinc film which allows the paint to protect the steel by the mechanism of cathodic protection.

For other applications (e.g. shop primers) where a short term protection is needed (6 months to 1 year), the zinc content is considerably lower. 

For many decades zinc rich paints have been considered to be the most effective anti-corrosion paint systems in use, and have a proven excellence in this application. The thickness of these zinc primers can vary between 6 and 125 microns: the higher the thickness and the higher the zinc content, the longer they may provide the anti-corrosion protection to the steel.

The main application area of zinc powder paints is in the anti-corrosion protection for industrial construction (steel infrastructure, pipelines, bridges, windmills, off shore rigs, petrochemical and power industries.…) and the anti-corrosion protection for marine applications. (sea containers, construction and maintenance of ships and marine equipment)

As the leader in the field of Fine Zinc Powders Umicore Zinc Chemicals is developing new products and is investigating Fine Zinc Powder applications. This is described in a number of publications : China Coating Journal July 2009 and March 2010; JPCL March 2013 and December 2015; Nace 2009; PCE January 2012; Wind Technology March 2012; ECS Nurnberg 2013.

For more information, please contact our Head Product Development, Pascal Verbiest Dr.Sc. at pascal.verbiest@umicore.com


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