The electrochemical behavior of 70/30 and 90/10 alloys in artificial seawater and in sterile culture media added with chloride and sulphide is analysed. The synergistic effect of the simultaneous presence of these anions on the corrosion process of cupronickels is also studied in the current paper.

Mixed cultures of facultative aerobic (Vibrio alginolyticus) and anaerobic (sulfate reducing bacteria) microorganisms were used to examine the corrosion behavior of these alloys in organically polluted media. The uneven distribution of bacteria mixed up with corrosion products reduces the protective characteristics of the outer layer of precipitated corrosion products. Extracellular polymeric substances produced by bacteria modify the structural characteristics of this layer.

Subject
Scanning electron microscopy, Materials, Sodium chloride, Artificial seawater, Copper alloys, Corrosion products, Metals, Bacteria, Immersion, Sulfides, Alloys, Chlorides, Corrosion potential
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1989
Association for Materials Protection and Performance (AMPP)
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