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07007 ADVANCEMENT IN ZINC RICH EPOXY PRIMERS FOR CORROSION PROTECTION

Picture for 07007 ADVANCEMENT IN ZINC RICH EPOXY PRIMERS FOR CORROSION PROTECTION
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Product Number: 51300-07007-SG
ISBN: 07007 2007 CP
Author: Claus E. Weinell and Soeren Nyborg Rasmussen
Publication Date: 2007
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The protecting mechanism of zinc rich coatings is mainly based on cathodic protection provided by the zinc dust in the paint. Cathode protection by zinc is finite; however, since after the zinc has been corroding for some time the electrical conductivity diminishes and at the same time zinc corrosion products build up on the zinc dust pigments and polarizes the zinc. The zinc primer still protects the steel substrate but the galvanic activity is taken over by post-cathodic protection which is based on barrier and inhibitive protection provided by the zinc corrosion products, also named “post-cathodic protection”. Improvement of the protecting mechanism can be obtained by formulation with auxiliary pigments combining the effects from size distribution and packing, pigment oil absorption, cathodic inhibition etc. A preliminary test result is given in this paper.
The protecting mechanism of zinc rich coatings is mainly based on cathodic protection provided by the zinc dust in the paint. Cathode protection by zinc is finite; however, since after the zinc has been corroding for some time the electrical conductivity diminishes and at the same time zinc corrosion products build up on the zinc dust pigments and polarizes the zinc. The zinc primer still protects the steel substrate but the galvanic activity is taken over by post-cathodic protection which is based on barrier and inhibitive protection provided by the zinc corrosion products, also named “post-cathodic protection”. Improvement of the protecting mechanism can be obtained by formulation with auxiliary pigments combining the effects from size distribution and packing, pigment oil absorption, cathodic inhibition etc. A preliminary test result is given in this paper.
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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
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Picture for Challenging the Performance Myth of Inorganic Zinc Rich vs Organic Zinc Rich Primers
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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
Publication Date: 2017
$20.00

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
$20.00

 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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