Table 3 Overview of studies that reported an increased or decreased corrosion rate by Shewanella spp. and the inferred corrosion mechanism.
From: Insights into the various mechanisms by which Shewanella spp. induce and inhibit steel corrosion
Shewanella species/strain | Increase (+) or decrease (−) of corrosion rate | Analytical method | Steel type | Presence of O2 | Possible electron donors or acceptors | Inferred corrosion mechanism (Letter refers to Fig. 3) | Reference |
|---|---|---|---|---|---|---|---|
S. oneidensis | −4 times | Weight loss | Mild steel coupons | Yes | Lactate, yeast extract, peptone | (a) Corrosion inhibition due to O2 consumption (c) Corrosion inhibition due to O2 scavenging by Fe(II) | |
S. oneidensis MR1 | −1.5 times | Weight loss | Carbon steel coupons | Yes | Lactate | (a) Corrosion inhibition due to O2 scavenging (c) Corrosion inhibition due to O2 scavenging by Fe(II) | |
S. oneidensis MR1 | +2 times | Weight loss | Biofilm covered plate in electric contact with uncovered plate | Yes | Lactate | Corrosion increase due to incomplete biofilm coverage | |
S. algae | +6.7 times | Max. pit depth | Stainless steel | Yes | peptone, Fe(III)citrate | Corrosion increase due to incomplete biofilm coverage | |
S. putrefaciens | +(n.d.) | Electrochemical | Carbon steel | No | Lactate, amino acids | (b) Corrosion increase due to Fe(III) reduction | |
S. putrefaciens | +1.5 times | Weight loss | Mild steel coupons | No | Fe(III)citrate, lactate | (b) Corrosion increase due to Fe(III) reduction | |
S. oneidensis MR1 | +2-3 times | Electrochemical (5 days) | Carbon steel | No | Amino acids H2 generation by electrode | (b) Corrosion increase due to Fe(III) reduction | |
S. oneidensis MR1 | +1.3 times | Weight loss (5 months) | Carbon steel | No | Amino acids | (b) Corrosion increase due to Fe(III) reduction | |
S. algae | +(n.d.) | Electrochemical atomic force microscopy | Stainless steel | No | Fe(III)citrate, peptone, yeast extract | (b) Corrosion increase due to Fe(III) reduction | |
S. loihica | −(n.d.) | Chemical analysis precipitates | Iron plates | Yes | Fe(III)citrate, lactate | (d) corrosion inhibition due to formation of stable Fe(II) precipitates | |
S. putrefaciens | +4.2 times | Weight loss | Mild steel | No | Sulfite, lactate | (e) Corrosion increase due to H2S formation | |
S. chilikensis CCC -APB5 | +5.7 times | Average pit depth | Carbon steel | No | lactate, acetate, pyruvate, thiosulfate | (e) Corrosion increase due to H2S formation | |
S. chilikensis CCC -APB5 | +2.5 times | Weight loss | Carbon steel | No | lactate, acetate, pyruvate, nitrate | (f) Corrosion increase due to nitrite formation | |
S. oneidensis MR1 | +6 times | Weight loss | Carbon steel | No | Nitrate, lactate | (f) Corrosion increase due to nitrite formation | |
S. oneidensis MR1 | +11 times | Weight loss | Carbon steel | No | Nitrate, no lactate | (f) Corrosion increase due to nitrite formation + (g/h/i) EMIC | |
S. fodinae 4t3-1-2LB | +7 times | Measurement of succinate | Fe(0) powder | No | fumarate | (g) direct EET and/or (i) indirect H2-mediated EET | |
S. oneidensis MR1 | +4 times | Weight loss electrochemical | Carbon steel | No | Fumarate, little tryptone | (g) direct EET and (i) indirect H2-mediated EET | |
S. oneidensis MR1 | +2.5 times | Average pit depth | Stainless steel | Yes | Amino acids from LB medium | (g) direct EET |
