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ARS Home » Midwest Area » Peoria, Illinois » National Center for Agricultural Utilization Research » Plant Polymer Research » Research » Publications at this Location » Publication #248000

Title: Bacterial Exopolysaccharides For Corrosion Inhibition on Metal Substrates

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

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/22/2010
Publication Date: 3/23/2010
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.

Interpretive Summary:

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.