Nuclear chemistry

Scanning electrochemical microscopy

Engineering

Biofilm

Pseudomonas aeruginosa

Bacteria

Biology

Pyocyanin

Electrochemistry

Photochemistry

Metallurgy

Materials science

Electron acceptor

Electron transfer

Chemical engineering

Quorum sensing

Dissolution

Physical chemistry

Genetics

Redox

Organic chemistry

Extracellular polymeric substance

Pitting corrosion

X-ray photoelectron spectroscopy

Composite material

Corrosion

Chemistry

Scanning electron microscope

Electrode

Corrosion Science

The influence of outward extracellular electron transfer (EET) of Pseudomonas aeruginosa in accelerating corrosion of 304 stainless steel was investigated. With less NO3− available as electron acceptor, P. aeruginosa biofilm accelerated the pitting corrosion. The ICP-MS and XPS results indicated that P. aeruginosa promoted the bioreductive dissolution of iron oxides in the passive film of stainless steel. Using in situ scanning electrochemical microscopy, we established a relationship between this accelerated deterioration of the passive film and the EET process mediated by the conversion of the redox states of pyocyanin secreted by P. aeruginosa.

Acceleration of corrosion of 304 stainless steel by outward extracellular electron transfer of Pseudomonas aeruginosa biofilm