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Corrosion protection of low-carbon steel using exopolysaccharide coatings from Leuconostoc mesenteroides

Permanent URL:
http://handle.nal.usda.gov/10113/49376
Abstract:
Corrosion of metals is a serious and challenging problem faced worldwide by industry. Purified Leuconostoc mesenteroides exopolysaccharide (EPS) coatings, cast from aqueous solution, inhibited the corrosion of low-carbon steel as determined by electrochemical impedance spectroscopy (EIS). There were two different corrosion behaviors exhibited when EPS films from different strains were cast onto the steel. One EPS coating reacted immediately with the steel substrate to form an iron (III) oxide layer (“rust”) during the drying process while another did not. The samples that did not flash corrode had higher corrosion inhibition and formed an iron (II) passivation layer during EIS testing that persisted after the cells were disassembled. Corrosion inhibition was strain-specific as polysaccharides with similar structure did not have the same corrosion potential.
Author(s):
Finkenstadt, Victoria L. , Côté, Gregory L. , Willett, J.L.
Subject(s):
Leuconostoc mesenteroides , polysaccharides , coatings , chemical degradation , steel , iron oxides
Format:
p. 1093-1100.
Note:
Includes references
Source:
Biotechnology letters 2011 June, v. 33, no. 6
Language:
English
Publisher:
Dordrecht : Springer Netherlands
Year:
2011
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.