Electrodeposited white bronzes on brass: Corrosion in 3.5 % sodium chloride solution
By Berretti, E.; Calisi, N.; Capaccioli, A.; Capozzoli, L.; Hamouda, A. M. S.; Giaccherini, A.; Giurlani, W.; Ienco, A.; Martinuzzi, S.; Innocenti, M.; Waware, U.; Virtanen, S.; Zangari, G.; Ahmed, R.; Lavacchi, A.
Published in Corrosion Science
Corrosion Science
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.