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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 #224793

Title: Agricultural Polymers for Corrosion Protection of Metals

item Finkenstadt, Victoria
item Cote, Gregory
item Willett, Julious - Jl

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/21/2008
Publication Date: 8/21/2008
Citation: Finkenstadt, V.L., Cote, G.L., Willett, J.L. 2008. Agricultural polymers for corrosion protection of metals [abstract]. American Chemical Society. Abstract AGFD234.

Interpretive Summary:

Technical Abstract: Corrosion is one of the most serious and challenging problems faced worldwide by industry. When metals come in contact with different environments such as air, water, chemical products and pollutants, they begin to degrade as the metal interacts with its environment. This research investigates the inhibition of corrosive behavior by agricultural-derived polymers such as starch and bacterial exopolysaccharides. Electrochemical Impedance Spectroscopy has been used to evaluate the corrosion inhibition of different polysaccharide thin films cast from an aqueous solution onto steel coupons. There were two different behaviors when films were cast onto the steel. Some samples interacted immediately with the metal coupon to form an iron (III) oxide layer (“rust”) during the drying process while others did not. The samples which did not form an oxide layer had the most corrosion protection and formed an iron (II) passivation layer during testing that persisted after the cells were disassembled.