J. Mater. Sci. Technol. ›› 2016, Vol. 32 ›› Issue (5): 465-469.DOI: 10.1016/j.jmst.2015.11.013

• Orginal Article • Previous Articles     Next Articles

Effect of Microstructures on Corrosion Behavior of Nickel Coatings: (II) Competitive Effect of Grain Size and Twins Density on Corrosion Behavior

Guozhe Meng1, 2, *, Yang Li1, Yawei Shao1, 2, Tao Zhang1, 2, Yanqiu Wang1, Fuhui Wang1, 2, Xuequn Cheng3, Chaofang Dong3, Xiaogang Li2, 3   

  1. 1. Corrosion and Protection Laboratory, Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University), Ministry of Education, Harbin 150001, China; 2 Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 3 Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2015-05-13 Online:2016-05-10
  • Contact: * Ph.D.; Tel.: +86 451 82519190; Fax: +86 451 82519190.
  • Supported by:

    The authors acknowledge the financial support from the National Basic Research Program of China (No. 2014CB643301), the National Natural Science Foundation of China (Nos. 50971050 and 51001036), the Program for New Century Excellent Talents in University (No. NCET-11-0575), the Ministry of Science and Technology of the People's Republic of China (No. 2012FY113000) and the Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University, No. HEUCF20151011), Ministry of Education (No. HEUCF20151011).

Abstract:

Nanocrystalline nickel coatings with grain size of 50 nm were annealed in vacuum at 200 °C and 400 °C for 10 min. Their microstructures were investigated by transmission electron microscopy (TEM). And their corrosion behaviors were studied by means of polarization and electrochemical impedance spectroscopy (EIS). The results showed that their grain size grew up to about 60 nm (200 °C) and 500 nm (400 °C), respectively. The specimen annealed at 200 °C possessed higher density of twins in compared with the counterparts of as-deposited and annealed at 400 °C. The normal grain size effect on the corrosion behavior was not observed. However, it was found that the corrosion resistance of the coating linearly changed with the density of twins.

Key words: anocrystalline, Corrosion properties, Annealing twins, Grain sizes