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10395 Electrochemical Characterization of Low Carbon Steels During Long Term Immersion in Natural Seawater

Picture for 10395 Electrochemical Characterization of Low Carbon Steels During Long Term Immersion
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Product Number: 51300-10395-SG
ISBN: 10395 2010 CP
Author: Anne-Marie Grolleau, Herve Le Guyader, Valerie Debout, Jean-Pierre Pautasso and Jerome Blanc
Publication Date: 2010
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The corrosion behaviour of two low carbon steels immersed in natural seawater for up to three years was studied. In particular, the aim of this work was to investigate localized corrosion through controlled long-term laboratory tests and discriminate between electrochemical and biological processes. Electrochemical techniques, especially galvanic coupling corrosion current measurements and monitoring of open circuit potentials with time were used to evaluate the effect of the seawater temperature. Associated weight loss measurements and penetration rates were also determined. The application of preventive and curative chlorination, as well as the use of acid cleanings, was also investigated. Finally, the corrosion layer of a specimen immersed for more than one year in ambient natural seawater was characterized using micro-Raman spectroscopy.

Keywords: Carbon steel, localized corrosion, seawater, magnetite
The corrosion behaviour of two low carbon steels immersed in natural seawater for up to three years was studied. In particular, the aim of this work was to investigate localized corrosion through controlled long-term laboratory tests and discriminate between electrochemical and biological processes. Electrochemical techniques, especially galvanic coupling corrosion current measurements and monitoring of open circuit potentials with time were used to evaluate the effect of the seawater temperature. Associated weight loss measurements and penetration rates were also determined. The application of preventive and curative chlorination, as well as the use of acid cleanings, was also investigated. Finally, the corrosion layer of a specimen immersed for more than one year in ambient natural seawater was characterized using micro-Raman spectroscopy.

Keywords: Carbon steel, localized corrosion, seawater, magnetite
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