High-strength copper-nickel (Cu-Ni-Mn-Al-Nb) alloys are widely used for marine applications because of their excellent resistance to seawater corrosion, high inherent resistance to biofouling, and ease of fabrication. However, in-service experience has shown that these alloys may encounter variable performance worldwide as a result of local environmental conditions. In particular, the corrosion performance of high-strength Cu-Ni alloys may be affected by the seawater environmental factors, which may include biofouling, temperature, salinity, pH, and dissolved oxygen content. This study reports an investigation into the galvanic corrosion performance between two wrought, high-strength copper-nickel alloys, with nickel contents of 15% and 19%, regarding the influence of surface oxide films/deposits and biofouling. X-ray photoelectron spectroscopy was used to study the composition of the corrosion product films. Analyses of galvanic currents, coupled and decoupled potentials routinely monitored for seawater immersion over a period of 2 years, are presented.
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1 June 2009
Research Article|
June 01 2009
Galvanic Corrosion Performance of High-Strength Copper-Nickel Alloys in Seawater
R.C. Barik;
R.C. Barik
*Surface Engineering and Tribology Group, School of Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ,
United Kingdom
. Present address: School of Engineering and Electronics, University of Edinburgh, Mayfield Road, Edinburgh, EH9 3JL, United Kingdom
.
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J.A. Wharton;
J.A. Wharton
‡
**Surface Engineering and Tribology Group, School of Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ,
United Kingdom
.‡Corresponding author. E-mail: [email protected].
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R.J.K. Wood;
R.J.K. Wood
**Surface Engineering and Tribology Group, School of Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ,
United Kingdom
.
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K.R. Stokes
K.R. Stokes
***Physical Sciences Department, Dstl Porton Down, Salisbury, Wiltshire, SP4 0JQ,
United Kingdom
.
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2009
CORROSION (2009) 65 (6): 359–367.
Citation
R.C. Barik, J.A. Wharton, R.J.K. Wood, K.R. Stokes; Galvanic Corrosion Performance of High-Strength Copper-Nickel Alloys in Seawater. CORROSION 1 June 2009; 65 (6): 359–367. https://doi.org/10.5006/1.3319141
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