Paper Title:
Effect of Trace RE on Corrosion Behavior of Ag-Cu-Ni Alloys
  Abstract

The corrosion performance of Ag-Cu-Ni-RE alloys in Na2S has been studied in order to assess the influence of rare earth (lanthanum and cerium) on the Ag-Cu-Ni alloys. Optical microscopy has been used to characterize the microstructures of the samples prior to the electrochemical tests. SEM, EDS and XRD have been used to observe the corrosion morphologies and chemical compositions of the samples. The electrochemical tests has been carried out at room temperature in 0.5, 1and 2% (wt. %) Na2S. The results reveal that the Ag-Cu-Ni-RE alloys exhibit improved corrosion resistance, as well as fine and uniform microstructures. Moreover, surface layers forming on Ag-Cu-Ni-RE alloys exhibit improved protective properties compared to the film growing on the Ag-Cu-Ni alloy. Here, it is also found that when comparing to the dilute Na2S solution conditions, there would be a little decrease of the corrosion rate in 2wt. %Na2S solution. In addition, Ag-Cu-Ni-La-Ce alloy generally exhibits the best corrosion resistance.

  Info
Periodical
Advanced Materials Research (Volumes 197-198)
Edited by
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Pages
507-513
DOI
10.4028/www.scientific.net/AMR.197-198.507
Citation
F. X. Huang, P. Yin, Y. H. Xu, Y. Zhang, Y. L. Yang, M. Li, "Effect of Trace RE on Corrosion Behavior of Ag-Cu-Ni Alloys", Advanced Materials Research, Vols. 197-198, pp. 507-513, 2011
Online since
February 2011
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$32.00
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