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Inorganic zinc-rich coatings (IOZ’s) are often considered the gold standard for corrosion protection in atmospheric environments. Frequently, zinc epoxy coatings are considered second best among the most effective coatings for corrosion protection. However, current zinc-rich coating technology is not exempt of limitations, such as poor mechanical properties of the film, rigid environmental application conditions, or the inefficient use of zinc particles for providing galvanic protection. Due to these limitations, a number of asset owners have made the decision not to use zinc-rich coatings to maintain coating systems in marine and offshore environments
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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.
Zinc rich primer coatings, both organic and inorganic, are extensively used in highly corrosive environments and they are part of a high performance coating system in the Protective Coatings Industry. During the 60’s and the 70’s, zinc rich epoxy primers dominated the market. Later, zinc ethyl silicate primers took over mainly due to their higher potential to corrosion protection. Nowadays however, new developments in zinc epoxy primers are setting the two categories of Zinc rich primers on the same level in terms of anticorrosion performance while adding the advantages of Epoxy based primers.