IMPEDANCE SPECTROSCOPY FOR STUDYING AND MONITORING CORROSION PHENOMENA

Impedance spectroscopy has been actively employed in investigations of corrosion phenomena. It has been used to study the kinetics and mecha nism of the corrosion behavior of metals in various media, fundamental questions related to the passivation and formation of protective film s on metals, the adsorption behavior of organic substances (inhibitors ), etc. This method is being used increasingly more extensively for pr actical purposes and, in particular, for studying and evaluating the e ffectiveness of protective coatings (oxide and polymer films, paint an d varnish coatings, etc.). Instruments for monitoring the rate of corr osion have been developed on the basis of this method and used in prac tice. The main ways to use impedance spectroscopy to solve problems in corrosion science and practical problems have been briefly examined i n this review.