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07005 ZINC RICH EPOXIES – ELECTROCHEMICAL PROPERTIES

Picture for 07005 ZINC RICH EPOXIES – ELECTROCHEMICAL PROPERTIES
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Product Number: 51300-07005-SG
ISBN: 07005 2007 CP
Author: Ole Øystein Knudsen, Astrid Bjørgum, Tone Frydenberg, and Kemal Nisancioglu
Publication Date: 2007
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$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

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Challenging the Performance Myth of Inorganic Zinc Rich vs Organic Zinc Rich Primers

Product Number: 51317--9127-SG
ISBN: 9127 2017 CP
Author: Jose Luna
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Protecting mechanisms of a new generation of activated zinc primers with enhanced protection vs inorganic zinc rich primers. Performance properties have been proven with results from different corrosion tests.
Picture for 07006 INORGANIC ZINC PRIMER VS ORGANIC ZINC PRIMER: (an end-user point of view ).
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07006 INORGANIC ZINC PRIMER VS ORGANIC ZINC PRIMER: (an end-user point of view ).

Product Number: 51300-07006-SG
ISBN: 07006 2007 CP
Author: Massimo Cornago
Publication Date: 2007
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 In this paper the approach of an Oil Company is demonstrated from the initial choice between different primers: inorganic zinc and organic (epoxy) zinc., to all the preliminary pre-qualification tests, the subsequently field test performed, and the procedures adopted, costs included.
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