Abstract

The inhomogeneity of organic coatings, and its effect upon electrochemical measurements, is discussed. Such inhomogeneity is hard to avoid and has a considerable influence upon the accuracy of electrochemical testing techniques. It is also the main cause of poor reproducibility in electrochemical measurements. To overcome this problem, a ‘wire beam electrode’ has been developed and used to test the inhomogeneity of sample coatings and to determine the distribution of ‘weak spots’. It is suggested that by the use of such a system the reproducibility of electrochemical measurements may be improved.

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