United States Department of Transportation
i
Impedance Spectroscopy for the Evaluation of Corrosion Inhibitors in Highway Deicers
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1997-03-01
[PDF-1.30 MB]
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Abstract:Electrochemical impedance spectroscopy (EIS) measurements were carried out on steel bars embedded in concrete blocks that were immersed in aqueous solutions of commercial deicing salts, many of which had corrosion inhibitors added. The effectiveness of the inhibitors was assessed by monitoring the evolution of the EIS results for a period of 11 months. EIS was supplemented with open circuit potential and polarization measurements. From the results, a semiquantitative ranking of the commercial deicers tested as to their corrosivity could be derived.
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