Effect of Trace RE on Corrosion Behavior of Ag-Cu-Ni Alloys

Fu Xiang Huang; Ping Yin; Yong Hong Xu; Ying Zhang; You Li Yang; Min Li

doi:10.4028/www.scientific.net/AMR.197-198.507

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 197-198Effect of Trace RE on Corrosion Behavior of...

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.

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Periodical:

Advanced Materials Research (Volumes 197-198)

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507-513

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https://doi.org/10.4028/www.scientific.net/AMR.197-198.507

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Online since:

February 2011

Authors:

Fu Xiang Huang, Ping Yin, Yong Hong Xu, Ying Zhang, You Li Yang, Min Li

Keywords:

Ag-Cu-Ni-RE Alloy, Corrosion, Polarisation

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