机械预处理对AZ80镁合金上制备的微弧氧化涂层电化学特性的影响

The Effect of Mechanical Pretreatment on the Electrochemical Characteristics of PEO Coatings Prepared on Magnesium Alloy AZ80.

作者信息

Sovík Ján, Kajánek Daniel, Pastorek Filip, Štrbák Milan, Florková Zuzana, Jambor Michal, Hadzima Branislav

机构信息

Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia.

Research Centre, University of Žilina, Univerzitná 8215/1, 010 26 Žilina, Slovakia.

出版信息

Materials (Basel). 2023 Aug 16;16(16):5650. doi: 10.3390/ma16165650.

DOI:10.3390/ma16165650

PMID:37629940

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10456923/

Abstract

The main objective of this article is to provide new information on the effects of mechanical pretreatment of AZ80 magnesium alloy ground with SiC emery papers of different grain sizes on the plasma electrolytic oxidation (PEO) process and corrosion properties of AZ80 in 0.1 M NaCl solution. Then, the roughness of the coated samples was measured by confocal microscopy. The corrosion properties of the ground and coated surfaces were determined by potentiodynamic polarization (PDP) within 1 h of exposure, and electrochemical impedance spectroscopy (EIS) was performed during 168 h of exposure at laboratory temperature. Consequently, the obtained results of the PDP measurements were evaluated by the Tafel analysis and the EIS evaluation was performed by the equivalent circuit analysis through Nyquist diagrams. The morphology and structure of PEO coatings were observed by scanning electron microscopy (SEM) through the secondary imaging technology, and the presence of certain elements in PEO coatings was analyzed by EDS analysis.

摘要

本文的主要目的是提供关于用不同粒度的碳化硅砂纸研磨AZ80镁合金后进行机械预处理，对其在0.1 M NaCl溶液中的等离子体电解氧化（PEO）过程及AZ80腐蚀性能影响的新信息。然后，通过共聚焦显微镜测量涂层样品的粗糙度。通过动电位极化（PDP）在暴露1小时内测定研磨和涂层表面的腐蚀性能，并在实验室温度下暴露168小时期间进行电化学阻抗谱（EIS）测试。因此，通过塔菲尔分析评估PDP测量获得的结果，并通过等效电路分析通过奈奎斯特图对EIS进行评估。通过扫描电子显微镜（SEM）利用二次成像技术观察PEO涂层的形貌和结构，并通过能谱分析（EDS）分析PEO涂层中某些元素的存在情况。