Journal of Materials Engineering and Performance

, Volume 27, Issue 8, pp 4280–4290 | Cite as

Systematic Insight into Chloride Concentration, Applied Potential and Time Effect on the Passive Film of Cu-Zn-Ni Ternary Alloy in Alkaline Solution

  • Li Wang
  • Decheng Kong
  • Chaofang DongEmail author
  • Binbin Zhao
  • Chang He
  • Yunyang Wan
  • Cheng Man
  • Xiaogang Li


The effects of chloride concentration, applied potential and time on the passive film of Cu-Zn-Ni ternary alloy in alkaline solution were systematically investigated using potentiodynamic and potentiostatic polarizations, electrochemical impedance spectroscopy, Mott–Schottky analysis, laser confocal microscopy, atomic force microscopy and x-ray photoelectron spectroscopy. Results showed that the pitting potential decreased as a linear function of log(\( a_{{{\text{Cl}}^{ - } }} \)), and the size of pits extended faster in the horizontal direction than in the vertical direction. The passive oxide film formed on Cu-Zn-Ni alloy mainly exhibited p-type semiconductor behavior, which was consistent with cuprous and nickel oxide, the main components in the film. The density of cation vacancy (approximately 1020-1021 cm−3) increased with potentiostatic time but reduced by the increasing potentials. The kinetics of passive film growth followed a parabolic law D = m * tn, where m is a constant considered as the initial growth rate and n is the time exponent. Subsequent to the formation of a compact and coherent passive film at higher potential, it was hard for an ion to migrate or for an aggressive ion to penetrate, which indicated better corrosion resistance for passive film formed under higher potential.


atomic force microscopy Cu-Zn-Ni ternary alloy electrochemical impedance spectroscopy laser confocal microscopy x-ray photoelectron spectroscopy 



This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFB 0702300), National Natural Science Foundation of China (Grant No. 51222106), Beijing Science and Technology Rising Star Interdisciplinary cooperation programs (Grant No. Z161100004916033).


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Copyright information

© ASM International 2018

Authors and Affiliations

  • Li Wang
    • 1
  • Decheng Kong
    • 1
  • Chaofang Dong
    • 1
    Email author
  • Binbin Zhao
    • 2
  • Chang He
    • 1
  • Yunyang Wan
    • 3
  • Cheng Man
    • 1
  • Xiaogang Li
    • 1
  1. 1.Corrosion and Protection Center, Key Laboratory for Corrosion and Protection (MOE)University of Science and Technology BeijingBeijingChina
  2. 2.Oil and Gas Technology Research Institute of PetroChina Changqing Oilfield CompanyXi’anChina
  3. 3.State Key Laboratory of Petroleum Resource and Prospecting, Beijing Key Laboratory of Oil and Gas Pollution Prevention and ControlChina University of PetroleumBeijingChina

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