AUTHOR=Welikala Sachie , Al-Saadi Saad , Gates Will P. , Panter Christopher , Singh Raman R. K. 

TITLE=Sulphate reducing bacteria (SRB) biofilm development and its role in microbial corrosion of carbon steel

JOURNAL=Frontiers in Materials

VOLUME=11

YEAR=2024

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1360869

DOI=10.3389/fmats.2024.1360869

ISSN=2296-8016

ABSTRACT=<p>The development of biofilm by pure SRB culture on carbon steel, and its role on corrosion were investigated using microscopic, spectroscopic, electrochemical and surface characterization techniques. Tubercle biofilm and irregularly shaped pits were observed on steel surfaces in high-nutrient biotic solution. Owing to development of a protective FeS film in 72 h immersion, corrosion resistance improved. In nutrient-deficient medium, a greater bacterial density attached to the metal surface as the consequence of starved bacteria seeking energy sources from metal. However, electrochemical non-homogeneity developed at the locations of their attachment, that gradually grew over the entire surface.</p>