Single-cell level investigation of microbiologically induced degradation of passive film of stainless steel via FIB-SEM/TEM and multi-mode AFM

  • Tianyu Cui
  • , Hongchang Qian*
  • , Yuntian Lou
  • , Xudong Chen
  • , Tong Sun
  • , Dawei Zhang
  • , Xiaogang Li
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The degradation of passive films of a stainless steel by S. algae was investigated at the single-cell level. The focused ion beam-scanning/transmission electron microscopy showed that the passive film underneath the adherent S. algae cell was significantly thinner than that without bacterial coverage after 3 days of inoculation. Atomic force microscopy (AFM) in the nano manipulation mode was used to move the bacterial cell and AFM in the dynamic mode revealed the nanoscale corrosion pit underneath. Peak force tapping-frequency modulation mode of AFM showed high Volta potentials at the pit center and low Volta potentials around the bacterial cell.

Original languageEnglish
Article number110543
JournalCorrosion Science
Volume206
DOIs
StatePublished - Sep 2022
Externally publishedYes

Keywords

  • Atomic, Force microscopy
  • Focused ion beam
  • Microbiologically influenced corrosion
  • Stainless steels

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