An investigation on the corrosion behaviour of B4C-reinforced AA5083 aluminium alloy in sodium chloride solution using electrochemical impedance spectroscopy

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2024-08-27 DOI:10.1007/s12034-024-03262-9

Kourosh Jafarzadeh, Hamed Ansari Ashlaghi, Ali Alizadeh, Hadiseh Mazhari Abbasi

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Abstract

In this research, the role of B₄C-reinforcing particles on the corrosion behaviour of Al5083/B₄C nanocomposite has been investigated. Al/B₄C nanocomposite powder with weight percentages of 3 and 7 of reinforcing phase was prepared by mechanical milling method. The resulting powder was initially hot-pressed and then hot-extruded. The microstructure of the sample was studied using scanning electron microscopy and their corrosion behaviour was studied using potentiodynamic polarization and scanning electrochemical impedance spectroscopy methods in different immersion time intervals. The results showed a uniform distribution of reinforcing particles and also the scattering of intermetallic particles at the surface of the samples. However, increasing the content of B₄C particles in the composite samples enhances the cathodic and anodic reactions by increasing the content of intermetallic particles as cathodic sites on the surface, so that higher corrosion current density is observed in the composite samples with 7 wt% B₄C. Finally, it was concluded that increasing the value of B₄C decreases the corrosion resistance of the B₄C-reinforced composite samples in sodium chloride solution, which makes it unsuitable in marine applications.

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使用电化学阻抗光谱法研究 B4C 增强 AA5083 铝合金在氯化钠溶液中的腐蚀行为

本研究探讨了 B4C 增强粒子对 Al5083/B4C 纳米复合材料腐蚀行为的影响。采用机械研磨法制备了增强相重量百分比分别为 3 和 7 的 Al/B4C 纳米复合材料粉末。制得的粉末首先经过热压，然后进行热挤压。使用扫描电子显微镜研究了样品的微观结构，并使用电位极化法和扫描电化学阻抗光谱法研究了样品在不同浸泡时间间隔内的腐蚀行为。结果表明，强化颗粒分布均匀，金属间颗粒也散落在样品表面。然而，增加复合材料样品中 B4C 颗粒的含量会增加金属间颗粒作为表面阴极位点的含量，从而增强阴极和阳极反应，因此在含有 7 wt% B4C 的复合材料样品中观察到更高的腐蚀电流密度。最后得出的结论是，增加 B4C 值会降低 B4C 增强复合材料样品在氯化钠溶液中的耐腐蚀性，因此不适合在海洋中应用。

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来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.