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Instantaneous impedance monitoring of synergistic effect between cavitation erosion and corrosion processes

Abstract

The most common method of determination of cavitation erosion resistance as well as the magnitude of erosion-corrosion synergistic interaction is based on the weight loss measurements. Nondestructive characterization of installations elements is in most cases impossible to perform. Also, such a measurement does not include local types of failure or alteration of operating conditions. There is an urge to elaborate a method for monitoring of cavitation erosion-corrosion damage. The authors used dynamic impedance technique to study change of electric parameters of various engineering alloys under synergistic interaction of cavitation erosion and corrosion in 3% NaCl solution. Monitoring of electric parameters offers a very good resemblance to failure level identified with weight loss function and microscopic analysis. It was possible to distinguish different stages of material degradation by means of instantaneous impedance measurements. Instantaneous value of charge transfer resistance provides information about synergistic influence of mechanical erosion on corrosion.

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
ELECTROCHIMICA ACTA no. 203, pages 388 - 395,
ISSN: 0013-4686
Language:
English
Publication year:
2016
Bibliographic description:
Ryl J., Wysocka J., Ślepski P., Darowicki K.: Instantaneous impedance monitoring of synergistic effect between cavitation erosion and corrosion processes// ELECTROCHIMICA ACTA. -Vol. 203, (2016), s.388-395
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.electacta.2016.01.216
Verified by:
Gdańsk University of Technology

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