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Effects of solution resistance and double layer capacity on the faradaic polarization of an electrochemical cell

✍ Scribed by Gerald F. Thomas; John M. Raycheba


Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
205 KB
Volume
33
Category
Article
ISSN
0013-4686

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✦ Synopsis


The basis of a method which allows one to investigate the kinetics of corrosion processes in systems exhibiting an uncompensated solution resistance and whose anodic and cathodic reactions have current-voltage behaviors described by the Butler-Volmer relation is presented. Compared to weight-loss measurements or dc techniques, the faradaic distortion method[l, 23 allows for very rapid and reliable assessment of the corrosion rate and Tafel slopes governing the current-voltage characteristics of an electrochemical cell. The method involves perturbing the system with a potentiostatically controlled sinusoidal voltage of fixed angular frequency w and of amplitude U. superimposed on the


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