Ohio University   Institute for Corrosion and Multiphase Technology  
 
Search
Ohio.edu Sites
Name Directory
Sponsors
People
Projects
Facilities
Publications
Software
Technology
NACE-OU
About Us
   
Members Only

NIST CO2 Corrosion Postdoc Opportunity and Lecture

 

On Wednesday February 12th, 2013 the ICMT hosted Dr. Jeffrey Sowards from Applied Chemicals and Materials Division of National Institute of Standards and Technology in Boulder, Colorado.

Dr. Sowards gave a lecture on “Microbiologically Influenced Corrosion of Copper and Steel Alloys in the Presence of Acetobacter sp. in a Simulated UST Sump Environment”

Time: February 12, 2014 from 1:00pm – 3:00pm
Venue: Innovation Center, Room 103

Speaker Bio: Jeffrey Sowards is a Metallurgist in the Applied Chemicals and Materials Division at the National Institute of Standards and Technology in Boulder, Colorado. His research interests at NIST include studies of corrosion and its effects on mechanical property degradation of structural materials and fuel pipelines, determination of structure-property relationships of engineering alloys, and evaluation of welding and materials processing on microstructure and mechanical properties. He was an NRC Postdoctoral Research Associate at NIST, a graduate student and postdoctoral researcher at The Ohio State University, and a guest researcher at the Brazilian Synchrotron Light National Laboratory. He received B.S.W.E., M.S., and Ph.D. degrees from The Ohio State University where he studied welding metallurgy and corrosion.

Abstract
Corrosion of underground storage tank (UST) sump components has been gaining recognition in recent years, particularly in the presence of alternative fuels such as fuel-grade ethanol (FGE) and ultra-low-sulfur diesel (ULSD). Usage of these fuels is projected to increase considerably over the next decade; thus, addressing the corrosion issues could be a major challenge facing the fuel storage and transport industries. Microbiologically influenced corrosion (MIC) is expected to be a significant contributor to corrosion of infrastructure alloys in alternative fuel environments because fuels are often biologically derived and conducive to supporting microbial growth. Acetobacter sp. is suspected to cause corrosion in UST systems since they convert carbon sources (e.g., FGE) into acetic acid, a volatile organic compound. Previous reports have demonstrated that acetic acid caused rapid corrosion of UST components, and that Acetobacter sp. make up the largest percentage of the microbial consortia in those environments.

In this work, we simulate corrosion of UST systems during headspace and aqueous exposure to biotic organic acid. Acetobacter sp. was inoculated into ethanol-water mixtures to induce corrosion during the metabolic conversion of ethanol into acetic acid. Carbon steel and copper were exposed to inoculum and volatile chemical species in the headspace over a period of approximately 30 days. The steel alloy exhibited pitting corrosion and the copper alloy exhibited pitting and intergranular corrosion due to biotic acetic acid. Corrosion rates were dependent on formation of corrosion products and are ranked as follows in order of increasing magnitude: Copper-aqueous < Steel-aqueous < Copper-headspace < Steel-headspace. The laboratory test method developed here reproduces corrosion observed in practice and could be used to test the efficacy of corrosion inhibitors and biocides in future studies.

ARCHIVE
20152014201320122011
20102009200820072006
2016

March

2015

October

September

July

March

2014     [top of page]

December

October

September

May

April

March

February

January

2013     [top of page]

December

November

October

September

August

June

May

March

2012     [top of page]

October

September

June

May

January

2011     [top of page]

November

September

May

March

February

2010     [top of page]

December

November

October

May

2009     [top of page]

November

October

September

August

July

June

May

April

March

February

January

2008     [top of page]

November

October

September

August

July

June

May

April

March

February

January

2007     [top of page]

December

November

October

September

July

June

May

March

February

January

2006     [top of page]

October

Ohio University

©2017 Ohio University. All Rights Reserved.

Institute for Corrosion and Multiphase Technology
Ohio University's Research and Enterprise Park
342 West State Street
Athens, Ohio 45701
United States of America
Telephone: +1-740-593-0283
Fax: +1-740-593-9949
[ Show Map ]