Characteristic and Mechanistic Investigation of Stress-Assisted Microbiologically Influenced Corrosion of X80 Steel in Near-Neutral Solutions

Abstract

The behavior and mechanisms of the stress-assisted microbiologically influenced corrosion (MIC) of X80 pipeline steel induced by sulfate-reducing bacteria (SRB) were investigated using focused ion beam-scanning electron microscopy (FIB). Electrochemical results show that SRB and stress have a synergistic effect on the corrosion of X80 steel. SRB accelerated the transformation of Fe3O4 into iron-sulfur compounds and may have caused the film breakage of X80 steel products. The obtained FIB results provide direct evidence that SRB promotes the corrosion of X80 steel.

Extracellular Electron Transfer in Microbiologically Influenced Corrosion of 201 Stainless Steel by Shewanella algae

“…In recent years, EET has been recognized as a prevalent mechanism of MIC. It involves the entry of electrons generated from metal oxidation into the cytoplasm and completes the respiratory processes of microorganisms [13][14][15][16]. In addition, an increasing number of research studies suggested that microorganisms could utilize alloying compounds within passive film of stainless steel as alternative electron acceptors, which led to the damage of the passive film [17,18].…”