Microbiologically influenced corrosion inhibition of carbon steel via biomineralization induced by Shewanella putrefaciens

Abstract

Microbiologically influenced corrosion inhibition (MICI) of Q235 carbon steel by biomineralization was investigated via a combination of surface analysis, electrochemistry, and scanning electrochemical microscopy (SECM). The results showed that Shewanella putrefaciens used the cell walls as the nucleation sites to induce the formation of a protective biomineralized layers which contained calcite and extracellular polymeric substances on the steel surface. The potentiodynamic polarization results demonstrated that the corrosion current density (icorr value) of the biomineralized steel surface was 0.38 μA cm−2, which was less than one-tenth that of the blank steel in a sterile medium (4.86 μA cm−2) after 14 days. The biomineralized layers presented wear resistance and could self-repair after undergoing mechanical damage under microbial conditions as verified by morphological and SECM observations. This work reveals that microbial-induced carbonate biomineralization, as a MICI approach, may be considered as a reliable, low-cost, environmentally friendly corrosion inhibition strategy.

Extracellular Polymeric Substances and Biocorrosion/Biofouling: Recent Advances and Future Perspectives

“…The negatively charged functional groups in EPS, such as -NH 2 , -COOH, -C-O-C, and -OH, first adsorb positively charged metal ions to form complexes. Then, EPS interact with metal ions by oxidation and precipitation to form biomineralized layers on the metal surface, which can protect metals from corrosive environments such as seawater [ 56 , 128 , 129 ]. The EPS control the kinetic pathway of CaCO 3 , biomineralizing nucleation and CaCO 3 crystal growth.…”

“…Recently, it was shown that a marine isolate of P. stutzeri can promote the formation of a protective biomineralization film, which had a good inhibition effect against steel corrosion [ 134 ]. S. putrefaciens could use cell walls as the nucleation sites to induce the formation of a protective biomineralized layer, which contained calcite and EPS on the steel surface [ 129 ].…”

Bacterial Biofilm Probed by Scanning Electrochemical Microscopy: A Review

“…Copyright (2015) John Wiley and Sons. (b, c) SECM images of a coating scratch during the S. putrefaciens ‐induced microbial self‐healing process before and after 7 days in the S. putrefaciens ‐inoculated medium [13c] . Reproduced with permission from Ref.…”

“…This microbiological influenced corrosion inhibition (MICI) is considered a reliable and environmentally friendly strategy for corrosion protection. To investigate the influence of S. putrefaciens on the microbially influenced corrosion inhibition process, SECM was applied to probe the oxygen concentration close to the scratched region of Q235 carbon steel [13c] . As shown in Figure 4b, the S. putrefaciens layer showed anti‐abrasive and self‐healing properties, and the corrosion of the steel was finally inhibited by the biomineralized layers induced by S. putrefaciens (Figure 4c).…”

The effect of riboflavin on the microbiologically influenced corrosion of pure iron by Shewanella oneidensis MR-1

“…The effects of microbes on corrosion are two-fold [34]. Besides the corrosion-accelerating effect of bacteria, microbes can directly or indirectly mitigate corrosion via processes known as microbiologically influenced corrosion inhibition (MICI) [35,36]. MICI can be achieved by microbial respiration consumption of corrosive substances, formation of mineralized layers, formation of EPS protective layer, competitive microbial corrosion inhibition or microbial secretion of corrosion inhibitors [37].…”