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Electrochemical studies on the corrosion of brass in seawater under anaerobic conditions

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Abstract

This paper reports an electrochemical study on the corrosion of brass in deoxygenated nonbuffered and buffered natural and artificial seawater solutions under anaerobic conditions. Cyclic voltammograms of brass and copper in natural seawater (NSW) and artificial seawater (ASW) were obtained in the passive and transpassive potential regions. The corrosion resistance of brass in natural and artificial seawater was evaluated, and open-circuit potentials were recorded over exposure period of 1 week. Brass samples from 3-month exposures in deoxygenated nonbuffered ASW and NSW, under open-circuit potential, have been imaged by scanning electron microscopy, and the elemental composition of the corrosion products was obtained by energy dispersive spectrometry analysis. It has been concluded that, under anaerobic conditions, the aggressivity of NSW is higher, with brass being less resistant to corrosion than copper, and that buffer contributes to reduce the aggressivity of both media.

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Acknowledgment

Financial support from the Portuguese Foundation for Science and Technology (FCT) is acknowledged.

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Authors and Affiliations

  1. Departamento de Química e Bioquímica, Faculdade de Ciências CCMM, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016, Lisboa, Portugal

    M. C. Bastos, L. F. A. Proença, M. M. M. Neto & I. T. E. Fonseca

  2. Departamento de Química Agrícola e Ambiental, Instituto Superior de Agronomia, Tapada da Ajuda, TULisbon, 1349-017, Lisboa, Portugal

    M. M. M. Neto

  3. Instituto Superior de Ciências da Saúde Egas Moniz, Campus Universitário, Quinta da Granja - Monte de Caparica, 2829-511, Caparica, Portugal

    L. F. A. Proença

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  1. M. C. Bastos
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  2. L. F. A. Proença
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  3. M. M. M. Neto
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  4. I. T. E. Fonseca
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Correspondence to I. T. E. Fonseca.

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Bastos, M.C., Proença, L.F.A., Neto, M.M.M. et al. Electrochemical studies on the corrosion of brass in seawater under anaerobic conditions. J Solid State Electrochem 12, 121–131 (2008). https://doi.org/10.1007/s10008-007-0369-2

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  • DOI: https://doi.org/10.1007/s10008-007-0369-2

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