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

被引：24
作者：
Gawel, L. [1 ]
Nieuzyla, L. [2 ]
Nawrat, G. [2 ]
Darowicki, K. [1 ]
Slepski, P. [1 ]
机构：
[1] Gdansk Univ Technol, Dept Electrochem Corros & Mat Engn, 11-12 Narutowicza St, PL-80233 Gdansk, Poland
[2] Silesian Tech Univ, Dept Inorgan Chem Analyt Chem & Electrochem, 6 Boleslawa Krzywoustego St, PL-44100 Gliwice, Poland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 722卷
关键词：
Plasma electrolytic oxidation; Magnesium; Corrosion; Electrochemical impedance spectroscopy; Galvanostatic mode; Biodegradable materials; ELECTROCHEMICAL CORROSION; NANOSTRUCTURED HYDROXYAPATITE; MICROARC OXIDATION; BEHAVIOR; RESISTANCE; INHIBITION; MICROSTRUCTURE; SPECTROSCOPY; PARAMETERS; ADDITIVES;
D O I：
10.1016/j.jallcom.2017.06.120
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：406 / 413
页数：8
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