White bronzes are electrodeposited coatings applied on brass as surface finishes. We report a comparative study on the corrosion resistance in chloride aqueous environment of two white bronzes, a Zn-bearing and a Zn-free. Corrosion tests showed that both materials provide protection to brass, but the Zn-free is more cathodic and performs better in the test environment, following a different corrosion mechanism. We also explored the effect of the coating thickness on the corrosion parameters. We found that the more cathodic OCPs were achieved with coatings exceeding 1 ?m, while the 0.5 ?m coatings show OCPs closer to the brass substrate.
Electrodeposited white bronzes on brass: Corrosion in 3.5 % sodium chloride solution
Berretti E;Capozzoli L;Ienco A;Lavacchi A
2020
Abstract
White bronzes are electrodeposited coatings applied on brass as surface finishes. We report a comparative study on the corrosion resistance in chloride aqueous environment of two white bronzes, a Zn-bearing and a Zn-free. Corrosion tests showed that both materials provide protection to brass, but the Zn-free is more cathodic and performs better in the test environment, following a different corrosion mechanism. We also explored the effect of the coating thickness on the corrosion parameters. We found that the more cathodic OCPs were achieved with coatings exceeding 1 ?m, while the 0.5 ?m coatings show OCPs closer to the brass substrate.File | Dimensione | Formato | |
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Corrosion Science 175 (2020) 108898.pdf
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