J. Mater. Sci. Technol. ›› 2020, Vol. 46: 12-20.DOI: 10.1016/j.jmst.2019.04.047

• Research Article • Previous Articles     Next Articles

Microbiologically influenced corrosion of 304 stainless steel by halophilic archaea Natronorubrum tibetense

Hongchang Qian, Lingwei Ma, Dawei Zhang*(), Ziyu Li, Luyao Huang, Yuntian Lou, Cuiwei Du*()   

  1. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China
  • Received:2018-12-19 Revised:2019-03-11 Accepted:2019-04-11 Published:2020-06-01 Online:2020-06-19
  • Contact: Dawei Zhang,Cuiwei Du

Abstract:

The corrosion behavior of 304 stainless steel (SS) in the presence of aerobic halophilic archaea Natronorubrum tibetense was investigated. After 14 days of immersion, no obvious pitting pit was observed on the SS surface in the sterile medium. By contrast, the SS exhibited serious pitting corrosion with the largest pit depth of 5.0 μm in the inoculated mediumthe inoculated medium. The X-ray photoelectron spectroscopy results indicated that the detrimental Fe2+ and Cr6+ increased in the passive film under the influence of archaea N. tibetense, which resulted in the accelerated deterioration of passive film and promoted the pitting corrosion. Combined with the energy starvation tests, the microbiologically influenced corrosion mechanism of 304 SS caused by halophilic archaea N. tibetense was discussed finally.

Key words: Stainless, Steel, Archaea, Microbiological influenced corrosion