Biofouling and Microbially Influenced Corrosion of Stainless Steels

Abstract:

Stainless steels are among the most investigated materials on biofouling and microbially-influenced corrosion (MIC). Although, generally corrosion-resistant owing to tenacious and passive surface film due to chromium, stainless steels are susceptible to extensive biofouling in sub-soil, fresh water and sea water and chemical process environments. Biofilms influence their corrosion behavior due to corrosion potential ennoblement and sub-surface pitting. Both aerobic and anaerobic microorganisms catalyse microbial corrosion of stainless steels through biotic and abiotic mechanisms. MIC of stainless steels is common adjacent to welds at the heat-affected zone. Both austenite and delta ferrite phases may be susceptible. Even super stainless steels are found to be amenable to biofouling and MIC. Microbiological, electrochemical as well as physicochemical aspects of MIC pertaining to stainless steels in different environments are analyzed.

• Periodical: Advanced Materials Research (Volume 794)
• Pages: 539-551
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.794.539
• Online since: September 2013
• Authors: K.A. Natarajan
• Keywords: Bacteria, Biofouling, Microbially Influenced Corrosion, Stainless Steel (SS)

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