Bacterial adhesion and corrosion behavior of different pure metals induced by sulfate reducing bacteria

Abstract

The corrosion behaviors of four pure metals (Fe, Ni, Mo and Cr) in the presence of sulfate reducing bacteria (SRB) were investigated in enriched artificial seawater (EASW) after 14-day incubation. Metal Fe and metal Ni experienced weight losses of 1.96 mg cm⁻² and 1.26 mg cm⁻², respectively. In contrast, metal Mo and metal Cr exhibited minimal weight losses, with values of only 0.05 mg cm⁻² and 0.03 mg cm⁻², respectively. In comparison to Mo (2.2 × 10⁶ cells cm⁻²) or Cr (1.4 × 10⁶ cells cm⁻²) surface, the sessile cell counts on Fe (4.0 × 10⁷ cells cm⁻²) or Ni (3.1 × 10⁷ cells cm⁻²) surface was higher.

Keywords:

• Sulfate reducing bacteria (SRB)
• pure metals
• sessile cell count
• microbiologically influenced corrosion (MIC)

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Data will be made available on request.

Additional information

Funding

This work was supported by National Natural Science Foundation of China (NSFC, Grant NO. 52171069).