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.
2020
Istituto di Chimica dei Composti OrganoMetallici - ICCOM -
Bronze
Electrodeposited films
Marine corrosion
SEM
XPS
XRD
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/404204
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