Mineralogical data, thermodynamic stability (Pourbaix) diagrams, and the simplexity principle for precipitation reactions were used to evaluate corrosion product mineralogy on copper alloys exposed to sulfate-reducing bacteria. The formation of copper sulfides as corrosion products in natural surface environments is suggestive of microbiologically influenced corrosion. Sulfide corrosion products other than chalcocite (Cu2S) indicate that reactions within a biofilm induced corrosion.

Subject
Stability, Marine environments, Water, Thermodynamics, Metal surfaces, Walls, Minerals, Biofilms, Corrosion products, Bacteria, Sulfides, Copper, Microbiologically influenced corrosion
Keywords:
microbiologically influenced corrosion, sulfate-reducing bacteria, corrosion product mineralogy, copper
National Association of Corrosion Engineers
1991
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