Effect of Microstructures on Corrosion Behavior of Nickel Coatings: (II) Competitive Effect of Grain Size and Twins Density on Corrosion Behavior
Effect of Microstructures on Corrosion Behavior of Nickel Coatings: (II) Competitive Effect of Grain Size and Twins Density on Corrosion Behavior
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DOI：
10.1016/j.jmst.2015.11.013
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发表时间：
2016-05-01
影响因子：
10.9
通讯作者：
Li, Xiaogang
中科院分区：
文献类型：
--
作者：
Meng, Guozhe;Li, Yang;Li, Xiaogang
纳米晶镍涂层的晶粒尺寸为50 nm，在真空中退火在200 ℃和400 ℃，10分钟。他们的微观结构进行了研究，通过透射电子显微镜（TEM）。采用极化曲线和电化学阻抗谱研究了它们的腐蚀行为。结果表明，它们的晶粒尺寸分别长大到约60 nm（200 ℃）和500 nm（400 ℃）。与沉积态和400 ℃退火的样品相比，200 ℃退火的样品具有更高的孪晶密度。未观察到正常晶粒尺寸对腐蚀行为的影响。然而，它被发现，涂层的耐腐蚀性与孪晶的密度线性变化。材料科学与技术学报编辑部版权所有（C）2016出版社：Elsevier Limited All rights reserved.
Nanocrystalline nickel coatings with grain size of 50 nm were annealed in vacuum at 200 degrees C and 400 degrees 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 degrees C) and 500 nm (400 degrees C), respectively. The specimen annealed at 200 degrees C possessed higher density of twins in compared with the counterparts of as-deposited and annealed at 400 degrees 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. Copyright (C) 2016, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.