4.5 Article

Effect of the Annealing Treatment on the Microstructure and Corrosion Resistance of a Cu-Al-Ni Alloy

期刊

METALS
卷 12, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/met12091473

关键词

copper alloy; EIS; dealloying corrosion; XPS; cyclic voltammetry

资金

  1. [ED431B 2021/14]

向作者/读者索取更多资源

The influence of annealing treatment on the microstructure and corrosion behavior of a complex Al-Ni bronze alloy was analyzed. The results showed that annealing treatment greatly improved the corrosion resistance of the alloy and enhanced the protective character of the passive film.
The influence of annealing treatment on the microstructure and the corrosion behaviour of a complex bronze Al-Ni alloy was analysed. The microstructural characterization after thermic treatment shows that the retained beta-phase disappears and the K-II-phase undergoes a spheroidization process. Moreover, there is an augmentation of K-phase precipitates within the alpha-phase, particularly K-IV and K-V, which homogenizes the distribution of alloying elements between the phases. The corrosion behaviour was investigated by means of selective corrosion tests, potentiodynamic measurements, and electrochemical impedance spectroscopy. All of the experiments showed that thermic treatment greatly improves the corrosion resistance of the alloy. As such, annealing treatment influences a microstructure to be more dealloying resistant, which allows the development of a more protective air-formed passive film. On the other hand, the lower current registered after anodic peaks and Electrochemical Impedance Spectroscopy data seem be correlated with a more protective layer formed on annealed material. As such, this protective character is due to a greater incorporation of Al3+, Ni2+ and Cu2+ in the passive film, as revealed by X-ray Photoelectron Spectroscopy results.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据