Corrosion Behavior of Some Transition Metals and 4340 Steel Metals Exposed to Sulfate-Reducing Bacteria

Abstract

Microbial colonization of metals (zirconium, chromium, niobium, tantalum, molybdenum, tungsten, and type 4340 steel [UNS G43400]) and susceptibility of these metals to microbiologically influenced corrosion by sulfate-reducing bacteria was investigated. Environmental scanning electron microscopy characterization after 12 months and 21 months showed patchy biofilms on all metals except tungsten. Weight loss after 24 months for zirconium and niobium were either nonexistent or negligible, indicating that these metals did not experience MIC under the test conditions.

Corrosion Behavior and Passive Film Composition of Alloy 825 in High Temperature and High H2S-CO2 Containing Environment

“…The reaction ( 9) is nearly impossible at room temperature and atmospheric pressure (Natishan et al, 1999). But MoS 2 might formed in a sulfur-containing environment at 230°C.…”