کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
195459 459814 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
MIC of stainless steel in freshwater and the cathodic behaviour of biomineralized Mn-oxides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
MIC of stainless steel in freshwater and the cathodic behaviour of biomineralized Mn-oxides
چکیده انگلیسی

Microbially influenced corrosion by manganese oxidizing microorganisms (MIC by MOMOs) is a corrosion phenomenon occurring in freshwater systems affecting stainless steels. Typically, chloride induced corrosion is observed at chloride concentrations normally not considered as critical. The initiation of corrosion is attributed to an anodic shift of the open circuit potential of the passive stainless steel caused by manganese dioxide biomineralized by the specific organisms. However, not only the potential of the passive steel seems of interest. For the stabilization of localized corrosion, the ability of the cathodic reaction to drive enough current for promoting the switch from metastable pitting to stable pit growth is considered important. Consequently, experiments have been carried out in order to compare the dynamic cathodic properties of the usual oxygen reduction reaction with that of biofilm incorporating biomineralized MnO2. The results indicate a significantly better cathodic performance of such biofilm which might explain the fast and extensive damages observed in certain cases of MIC by MOMOs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 51, Issue 27, 25 August 2006, Pages 6081–6084
نویسندگان
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