介质pH对AZ31镁合金在氯化物和硫酸盐介质中腐蚀行为的影响

IF 1.1 Q4 ELECTROCHEMISTRY
M. Gururaj Acharya,  A. Nityananda Shetty
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引用次数: 1

摘要

AZ31合金具有超低密度、良好吸能、高阻尼等优良性能,但耐腐蚀性能较差。采用动电位极化和电化学阻抗谱(EIS)等电化学技术研究了介质pH对AZ31合金在氯化物和硫酸盐介质中腐蚀的影响。在不同浓度(0.05-0.25M)培养基中改变pH值进行试验。利用扫描电镜和x射线能谱分析腐蚀后合金表面形貌和成分。最后,记录的结果反映了介质浓度越高,腐蚀速率越快的趋势;介质的pH值越低,腐蚀速率越快。在所研究的pH范围内,该合金在pH 11时具有较高的耐蚀性,而在pH 3时具有较低的耐蚀性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Media pH on Corrosion Behaviour of AZ31 Magnesium Alloy in Chloride and Sulphate Media

AZ31 alloy has excellent properties like ultra-low density, good energy absorption, and high damping performance but has poor corrosion resistance. The influence of media pH on the corrosion of AZ31 alloy in chloride and sulphate media was investigated using such electrochemical techniques as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The tests were carried out by varying pH in different concentrations (0.05–0.25M) of the media. The surface morphologies and surface compositions of the corroded alloy surfaces were analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. Conclusively, the recorded results reflect a trend of a higher corrosion rate at higher concentrations of the media; and an increase in the corrosion rate on decreasing the pH of the media. In the studied pH range, the alloy showed a higher corrosion resistance at pH 11 and a lower corrosion resistance at pH 3.

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来源期刊
Surface Engineering and Applied Electrochemistry
Surface Engineering and Applied Electrochemistry Engineering-Industrial and Manufacturing Engineering
CiteScore
1.70
自引率
22.20%
发文量
54
审稿时长
6 months
期刊介绍: Surface Engineering and Applied Electrochemistry is a journal that publishes original and review articles on theory and applications of electroerosion and electrochemical methods for the treatment of materials; physical and chemical methods for the preparation of macro-, micro-, and nanomaterials and their properties; electrical processes in engineering, chemistry, and methods for the processing of biological products and food; and application electromagnetic fields in biological systems.
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