Novel Mechanism of Microbially Induced Carbon Steel Corrosion at an Aqueous/Non-aqueous Interface

Robert B. Miller; Anwar Sadek; Audra L. Crouch; James G. Floyd; Carrie A. Drake; Bradley S. Stevenson; Wendy Crookes-Goodson; Chelsea N. Monty; John M. Senko

doi:10.1021/acs.iecr.0c02497

Novel Mechanism of Microbially Induced Carbon Steel Corrosion at an Aqueous/Non-aqueous Interface

Robert B. Miller, Anwar Sadek, Audra L. Crouch, James G. Floyd, Carrie A. Drake, Bradley S. Stevenson, Wendy Crookes-Goodson, Chelsea N. Monty, John M. Senko^*

^*Corresponding author for this work

Earth and Planetary Sciences

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Microbially influenced corrosion (MIC) is a common problem in biodiesel storage tanks. Here, thick microbial growths develop at and span aqueous/non-aqueous fluid interfaces. MIC in this setting was investigated in experiments using zero-resistance ammetry (ZRA) measurements. To mimic the water-fuel interface, one carbon steel coupon was deployed in B20 biodiesel and one carbon steel coupon was deployed in medium mimicking storage tank sump water, and current between the two coupons was measured. ZRA incubations were inoculated with fungi isolated from contaminated B20 biodiesel storage tanks. Corrosion on both coupons was the greatest in incubations with a fungus whose filaments penetrated the diesel fuel layer, while organisms that did not explore the fuel induced corrosion only on the coupon immersed in water and not on the coupon immersed in the fuel. Subsequent ZRA experiments indicated that current between steel coupons was only achieved when fungal hyphae penetrated the non-aqueous layer, and this resulted in the most extensive corrosion of the coupons. We call this corrosion aqueous/non-aqueous interfacial MIC (ANI-MIC).

Original language	English (US)
Pages (from-to)	15784-15790
Number of pages	7
Journal	Industrial and Engineering Chemistry Research
Volume	59
Issue number	35
DOIs	https://doi.org/10.1021/acs.iecr.0c02497
State	Published - Sep 2 2020

Funding

The work of B.S.S. and J.G.F. was supported by the United States Air Force, AFRL Biological Materials and Processing Research Team, Materials and Manufacturing Directorate as a subcontract to B.S.S. (S-111-016-001) through UES’s prime contract FA8650-15-D-5405, task order 001 and partly through a grant awarded to B.S.S. from the United States Air Force Academy through the Secretary of Defense’s Corrosion Protection Office Technical Corrosion Collaboration program (TCC; FA7000-15-2-0001). The work of C.N.M. and R.B.M. was partially conducted at the USAF AFRL through an Air Force Research Lab Summer Faculty Fellowship Program (SFFP) with the Biological Materials and Processing Research Team. We thank Caitlin Bojanowski for assistance with methodology.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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title = "Novel Mechanism of Microbially Induced Carbon Steel Corrosion at an Aqueous/Non-aqueous Interface",

abstract = "Microbially influenced corrosion (MIC) is a common problem in biodiesel storage tanks. Here, thick microbial growths develop at and span aqueous/non-aqueous fluid interfaces. MIC in this setting was investigated in experiments using zero-resistance ammetry (ZRA) measurements. To mimic the water-fuel interface, one carbon steel coupon was deployed in B20 biodiesel and one carbon steel coupon was deployed in medium mimicking storage tank sump water, and current between the two coupons was measured. ZRA incubations were inoculated with fungi isolated from contaminated B20 biodiesel storage tanks. Corrosion on both coupons was the greatest in incubations with a fungus whose filaments penetrated the diesel fuel layer, while organisms that did not explore the fuel induced corrosion only on the coupon immersed in water and not on the coupon immersed in the fuel. Subsequent ZRA experiments indicated that current between steel coupons was only achieved when fungal hyphae penetrated the non-aqueous layer, and this resulted in the most extensive corrosion of the coupons. We call this corrosion aqueous/non-aqueous interfacial MIC (ANI-MIC).",

author = "Miller, {Robert B.} and Anwar Sadek and Crouch, {Audra L.} and Floyd, {James G.} and Drake, {Carrie A.} and Stevenson, {Bradley S.} and Wendy Crookes-Goodson and Monty, {Chelsea N.} and Senko, {John M.}",

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AU - Sadek, Anwar

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AU - Floyd, James G.

AU - Drake, Carrie A.

AU - Stevenson, Bradley S.

AU - Crookes-Goodson, Wendy

AU - Monty, Chelsea N.

AU - Senko, John M.

PY - 2020/9/2

Y1 - 2020/9/2

N2 - Microbially influenced corrosion (MIC) is a common problem in biodiesel storage tanks. Here, thick microbial growths develop at and span aqueous/non-aqueous fluid interfaces. MIC in this setting was investigated in experiments using zero-resistance ammetry (ZRA) measurements. To mimic the water-fuel interface, one carbon steel coupon was deployed in B20 biodiesel and one carbon steel coupon was deployed in medium mimicking storage tank sump water, and current between the two coupons was measured. ZRA incubations were inoculated with fungi isolated from contaminated B20 biodiesel storage tanks. Corrosion on both coupons was the greatest in incubations with a fungus whose filaments penetrated the diesel fuel layer, while organisms that did not explore the fuel induced corrosion only on the coupon immersed in water and not on the coupon immersed in the fuel. Subsequent ZRA experiments indicated that current between steel coupons was only achieved when fungal hyphae penetrated the non-aqueous layer, and this resulted in the most extensive corrosion of the coupons. We call this corrosion aqueous/non-aqueous interfacial MIC (ANI-MIC).

AB - Microbially influenced corrosion (MIC) is a common problem in biodiesel storage tanks. Here, thick microbial growths develop at and span aqueous/non-aqueous fluid interfaces. MIC in this setting was investigated in experiments using zero-resistance ammetry (ZRA) measurements. To mimic the water-fuel interface, one carbon steel coupon was deployed in B20 biodiesel and one carbon steel coupon was deployed in medium mimicking storage tank sump water, and current between the two coupons was measured. ZRA incubations were inoculated with fungi isolated from contaminated B20 biodiesel storage tanks. Corrosion on both coupons was the greatest in incubations with a fungus whose filaments penetrated the diesel fuel layer, while organisms that did not explore the fuel induced corrosion only on the coupon immersed in water and not on the coupon immersed in the fuel. Subsequent ZRA experiments indicated that current between steel coupons was only achieved when fungal hyphae penetrated the non-aqueous layer, and this resulted in the most extensive corrosion of the coupons. We call this corrosion aqueous/non-aqueous interfacial MIC (ANI-MIC).

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Novel Mechanism of Microbially Induced Carbon Steel Corrosion at an Aqueous/Non-aqueous Interface

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