Electrochemical analysis on localized corrosion of PEO/magnesium oxide coating

被引：1
|
作者：
Shahri, Z. [1 ]
Allahkaram, S. R. [1 ]
Soltani, R. [1 ]
Jafari, H. [2 ]
机构：
[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Tehran, Iran
[2] Shahid Rajaee Teacher Training Univ SRTTU, Fac Mat Engn & Interdisciplinary Sci, Mat Engn Dept, Tehran, Iran
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 1003卷
关键词：
Plasma electrolyte oxidation; Electrochemical noise; Wavelet analysis; shot noise theory; NOISE-ANALYSIS; IMPEDANCE SPECTROSCOPY; ALLOY; BEHAVIOR; MICROSTRUCTURE; SUSCEPTIBILITY; INHIBITION; FREQUENCY; OXIDATION; DEPOSIT;
D O I：
10.1016/j.jallcom.2024.175572
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：
Mg-Zn-Ca alloys have been identified as a promising biodegradable material for implants. However, their high corrosion rate causes unexpected failures. Plasma electrolyte oxidation (PEO) coating is an effective approach to reduce corrosion rate. MgO coating was applied by the PEO technique on the Mg-5Zn-0.4Ca alloy. The corrosion mechanism was investigated by impedance spectroscopy (EIS) and electrochemical noise (ECN). This paper aims to determine if PEO coating can improve the corrosion performance of this alloy during submersion. Additionally, it seeks to investigate whether pitting corrosion can be a weakness for these coatings, despite the inherent holes and cracks in this coating.
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页数：16
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