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United States Department of Agriculture

Agricultural Research Service

Research Project: AGRICULTURAL POLYMERS FOR PREVENTION OF CORROSION ON METALS

Location: Plant Polymer Research

Title: Bacterial Exopolysaccharides For Corrosion Inhibition on Metal Substrates

Authors
item Finkenstadt, Victoria
item Bucur, Claudiu
item Evans, Kervin
item Cote, Gregory
item Willett, Julious

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: January 22, 2010
Publication Date: March 23, 2010
Citation: Finkenstadt, V.L., Bucur, C.B., Evans, K.O., Cote, G.L., Willett, J.L. 2010. Bacterial exopolysaccharides for corrosion inhibition on metal substrates [abstract]. American Chemical Society. Paper #210.

Technical Abstract: Biofilms, composed of extra-cellular polymers secreted by bacteria, have been observed to both increase as well as decrease the rate of metal corrosion. Exopolysaccharides derived from Leuconostoc mesenteroides cultures have been shown to inhibit corrosion on corrosion-sensitive metals. The substantially pure exopolysaccharide has a(1'6)-linked D-glucose backbone and approximately 3-4% branching of a(1'3) linkages. Pore resistance and corrosion rate were calculated from electrochemical impedance spectroscopy and linear polarization studies. The corrosion rate was at least 50% lower and the pore resistance was twice as high than control samples, indicating good inhibitory processes. This material may be may be useful in anti-corrosion coating applications.

Last Modified: 9/2/2014
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