Corrosion Science and Technology

  • 제15권6호
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  • Pages.311-313
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  • 2016
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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Electrochemical Impedance Study for Selective Dissolution of a Cu-Zn Alloy

  • Hoshi, Y. (Department of Pure and Applied Chemistry, Faculty of Industrial Science and Technology, Tokyo University of Science) ;
  • Tabei, K. (Department of Pure and Applied Chemistry, Faculty of Industrial Science and Technology, Tokyo University of Science) ;
  • Shitanda, I. (Department of Pure and Applied Chemistry, Faculty of Industrial Science and Technology, Tokyo University of Science) ;
  • Itagaki, M. (Department of Pure and Applied Chemistry, Faculty of Industrial Science and Technology, Tokyo University of Science)
  • 투고 : 2016.09.22
  • 심사 : 2016.11.29
  • 발행 : 2016.12.31
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초록

The anodic dissolution behavior of copper and brass in an electrolyte solution of 0.5M NaCl containing 0.5 mM $NaHCO_3$ was investigated by electrochemical impedance spectroscopy. The Nyquist plots of the copper impedance described a small loop in the high-frequency range and a large locus in the low-frequency range. Additionally, the features of the impedance spectrum of the brass were similar to those of the copper. This indicates that the copper-enriched layer formed on the brass surface due to the selective dissolution of the zinc from the surface. In addition, the rest potential and the anodic polarization curve for each sample were measured in order to discuss the selective dissolution of the zinc from the brass surface.

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참고문헌

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