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Impedance monitoring of corrosion degradation of plasma electrolytic oxidation coatings (PEO) on magnesium alloy

Abstract

Impedance technique based on continuous multisinusoidal current perturbation was used to explain degradation process of plasma electrolytic oxidation coatings (PEO) on magnesium alloy. An obtained impedance spectrum was fitted by electrical equivalent circuit to describe properties of conversion layer on magnesium alloy. Additionally, galvanostatic mode maintained during experiment, with DC current equal to zero, allowed to achieve corrosion potential in degradation process. This methodology has advantage over more conventional methods. It allows observing parameters change in function of time and explanation of the degradation process of PEO on magnesium alloy.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
JOURNAL OF ALLOYS AND COMPOUNDS no. 722, pages 406 - 413,
ISSN: 0925-8388
Language:
English
Publication year:
2017
Bibliographic description:
Gaweł Ł., Nieuzyla L., Nawrat G., Darowicki K., Ślepski P.: Impedance monitoring of corrosion degradation of plasma electrolytic oxidation coatings (PEO) on magnesium alloy// JOURNAL OF ALLOYS AND COMPOUNDS. -Vol. 722, (2017), s.406-413
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2017.06.120
Verified by:
Gdańsk University of Technology

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