Galvanic action between zinc and steel is an important property that contributes to the high corrosion resistance of zinc-coated steels. Quantitative knowledge of the galvanic throwing power (i.e., the area of the steel surface that is not covered with zinc but is galvanically protected by the coating in the surrounding area) is of practical importance to the effective application of zinc-coated steel products. The present investigation reported results of a study of the galvanic protection distance determined for the steel/zinc galvanic couple under various laboratory and field conditions.

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NACE International
2000
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