Electrochemical Studies of Vinyl Ester Coatings for Fuel Tanks
By N., Balbyshev V.; P., Bierwagen Gordon & L., Berg R.
Published in NULL
NULL
1998
Abstract
Several types of vinyl ester coatings, known for their outstanding corrosion resistance properties, have been subjected to immersion and evaluated for corrosion resistance by electrochemical noise methods (ENM) and electrochemical impedance spectroscopy (EIS). The test solution was chosen to emulate the water bottoms found in underground fuel storage tanks. Electrochemical noise Impedance, calculated from electrochemical noise data, has been used to supplement the ENM and EIS techniques and for a better understanding of low-frequency behavior of these coating systems. The data for first three months of exposure shows good agreement between the ENM test results and electrochemical noise impedance. The DC resistance and EIS values have been found to deviate from equivalent parameters obtained from the above two techniques. The results from four different electrochemical methods are interpreted, and the correlation among them is discussed.
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