Corrosion of pipes made of stainless steel in the process water distribution system of a leather processing plant was investigated by various analytical and electrochemical methods. The attack was identified as MIC by manganese oxidizing microorganisms. The preferential attack at the heat tinted welds is explained by the potential shift caused by biomineralized MnO2, preventing repassivation.

Subject
Weld attack, Pipe surfaces, Water, Materials, Piping, Repassivation potentials, Containment, Inspection, Manganese, Corrosion coupons, Deposit corrosion, Electrodes, Corrosion potential
Keywords:
MIC, ennoblement, manganese dioxide, stainless steel, welds
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2005
Association for Materials Protection and Performance (AMPP)
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