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07005 ZINC RICH EPOXIES – ELECTROCHEMICAL PROPERTIES

Product Number: 51300-07005-SG
ISBN: 07005 2007 CP
Author: Ole Øystein Knudsen, Astrid Bjørgum, Tone Frydenberg, and Kemal Nisancioglu
Publication Date: 2007
$0.00
$20.00
$20.00
Protective coating systems for corrosive environments normally include a zinc rich primer. In the past decade mainly zinc epoxy primers have been applied on offshore constructions in the Norwegian sector. Zinc rich primers improve the corrosion creep resistance of organic coating systems, and the effect is believed to be due to cathodic protection of the substrate. In order for the zinc rich primer to provide cathodic protection the zinc particles must be electrochemically active and in electrical contact with the substrate. However, the epoxy binder may insulate the zinc from the substrate and may also protect the zinc from oxidation. In this work electrochemical properties of zinc epoxy primers have been investigated: Capacity for cathodic protection of the substrate and electrical contact between the zinc particles through the film. The electrochemical properties are correlated with results from cyclic corrosion creep testing.
Protective coating systems for corrosive environments normally include a zinc rich primer. In the past decade mainly zinc epoxy primers have been applied on offshore constructions in the Norwegian sector. Zinc rich primers improve the corrosion creep resistance of organic coating systems, and the effect is believed to be due to cathodic protection of the substrate. In order for the zinc rich primer to provide cathodic protection the zinc particles must be electrochemically active and in electrical contact with the substrate. However, the epoxy binder may insulate the zinc from the substrate and may also protect the zinc from oxidation. In this work electrochemical properties of zinc epoxy primers have been investigated: Capacity for cathodic protection of the substrate and electrical contact between the zinc particles through the film. The electrochemical properties are correlated with results from cyclic corrosion creep testing.
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07007 ADVANCEMENT IN ZINC RICH EPOXY PRIMERS FOR CORROSION PROTECTION

Product Number: 51300-07007-SG
ISBN: 07007 2007 CP
Author: Claus E. Weinell and Soeren Nyborg Rasmussen
Publication Date: 2007
$20.00