Abstract
I. Introduction In this paper, we will consider, first, the fundamentals of the measurement of corrosion protection of organic coatings. This first portion will emphasize electrochemical characterization methods for the corrosion protective properties of organic coatings, especially electrochemical methods, and the information about the coating such characterization gives us. In the second portion of the paper, we will consider the use of two of these methods, electrochemical noise methods (ENM) and electrochemical impedance spectroscopy (EIS) to consider film thickness effects on corrosion. In the third section, we will show how one can pred corrosion protection lifetime of organic coatings from ENM and EIS data obtained in immersion and Prohesion exposure. II. Basics of Measuring Corrosion Protection Properties of Organic Coatings A. Introduction The corrosion protection properties of organic coatings are some of the most important properties of the entire coatings system. In a standard (top coat + primer + metal
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