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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 2    No. 1    February 1992

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THE INITIAL CORROSION MECHANISM OF α-PHASE ALUMINIUM BRONZE IN NaCI SOLUTION
Zhu Xiaolong1 ,Li Renshun2 ,Wu Rengeng2, Zhou Derui2

1.General Research Institutefor Non-Ferrous Metals, Being 100088, China
2.Harbin Institute of Technology, Harbin 150006, China

Abstract:The polarization curves of the a-phase aluminium bronze measured in 5% NaCI electrochemically show that the corrosion process of the alloy is controlled by the diffusion of oxygen. The corrosion surface of theα-phase Al bronze in NaCI solution for a short time was analysed by X-ray Photoelectron Spectroscopy (XPS). The results indicate that the initial corrosion product of the Al bronze consists of a simple Cu2O phase, A1 and Ni are incorporated in Cu2O lattice structure in the form of ions, and none of the aluminium compound can be detected. The authors propose that the initial corrosion mechanism of a-phase A1 bronzes in NaCI solution should include oxidation, reduction and diffusion.

 

Key words: a-phase Al bronze, NaCI solution, initial corrosion, X-ray Photoelectron Spectroscopy

ISSN 1672-7029
CN 43-1423/U

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