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 μm, while the 0.5 μm coatings show OCPs closer to the brass substrate.
Electrodeposited white bronzes on brass: Corrosion in 3.5 % sodium chloride solution / 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.. - In: CORROSION SCIENCE. - ISSN 0010-938X. - ELETTRONICO. - 175:(2020), pp. 108898-108898. [10.1016/j.corsci.2020.108898]
Electrodeposited white bronzes on brass: Corrosion in 3.5 % sodium chloride solution
Berretti E.;Calisi N.;Capaccioli A.;Capozzoli L.;Giaccherini A.;Giurlani W.;Ienco A.;Martinuzzi S.;Innocenti M.;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 μm, while the 0.5 μm coatings show OCPs closer to the brass substrate.
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