Investigation on the Electrochemical Performance of Plasma Sprayed Ni/Cr-Fe Alloy Coatings in 3.5 %(wt) NaCl Solution

Abstract:

Metal material corrosion resistance chloride ion always is a common problem. In order to further study corrosivity of metal materials in chloride solution, in this paper, a double-layers coating consisted of Ni/Cr-Fe alloy which were prepared by plasma sprayed. The morphology and corrosion resistance of that coating in 3.5 % (wt) NaCl solution were investigated by SEM and Scanning Electrochemical Microscopy (SECM). Because coating had some cracks and pores so the coating sample was corroded and the corrosion current increased rapidly in initial stage. After 10 h of immersion, the corrosion current remained stably. Hence, the sample with plasma spraying Ni/Cr-Fe alloy coating had poor chloride corrosion resistance.

• Periodical: Advanced Materials Research (Volumes 1033-1034)
• Pages: 1245-1248
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1033-1034.1245
• Online since: October 2014
• Authors: Xi Shi, Jun Liang Zhang, Qi Liang Zhao, Yi Xiao, Qing Dong Zhong*
• Keywords: Chloride Ions, Coat, Corrosivity, Scanning Electrochemical Microscopy (SECM)

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