Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS Surface Engineering Pub Date : 2023-03-04 DOI:10.1080/02670844.2023.2223451

V. Kasatkin, I. Kasatkina, N. Bogdashkina, M. Gerasimov, B. Krit, S. Grigoriev, I. Suminov, I. A. Kozlov

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引用次数: 2

Abstract

ABSTRACT The influence of Microarc Oxidation (MAO) modes of titanium substrate in electrolytes of the original composition is investigated. Used electrolytes no contain sodium silicate but includes nickel sulphate, sodium aluminate and alkali. The morphology and composition of the obtained coatings were studied by electron microscopy. The electrochemical behaviour was studied using polarisation curves and electrochemical impedance spectroscopy (EIS). Proposed Equivalent circuits are adequately corresponded to experimental EIS data with no more 6% error. The dependence between the elements of the Equivalent circuits and the morphological characteristics depending on the processing is considered. It is shown that MAO coatings on titanium have high corrosion resistance in an aggressive sulphuric acid. The electrochemical properties of coatings undergo irreversible changes in the direction of deterioration after anodic polarisation. It has been established that nickel doping of MAO coatings on titanium does not allow them to serve as anode materials.

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钛的不同微弧氧化方式对涂层电化学性能和表面形貌的影响

摘要研究了原组成电解质中钛基体微弧氧化（MAO）模式的影响。使用的电解质不含硅酸钠，但包括硫酸镍、铝酸钠和碱。用电子显微镜研究了所得涂层的形貌和组成。利用极化曲线和电化学阻抗谱（EIS）研究了其电化学行为。所提出的等效电路与实验EIS数据充分对应，误差不超过6%。考虑了等效电路的元件与取决于处理的形态特征之间的相关性。结果表明，钛表面微弧氧化涂层在腐蚀性硫酸中具有较高的耐蚀性。阳极极化后，涂层的电化学性能在劣化方向上发生不可逆的变化。已经证实，钛上的MAO涂层的镍掺杂不允许它们用作阳极材料。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.