Corrosion Characteristics of Nanocrystalline Co-Ni-Fe Deposits in 3.5% NaCl Solution

被引：0
|
作者：
Lin Lubo [1 ]
Dai Pinqiang [2 ]
Lin Lanfang [3 ]
Liao Yaoxiang
机构：
[1] Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China
[2] Fujian Univ Technol, Fuzhou 350108, Peoples R China
[3] Jimei Univ, Xiamen 361021, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2012年 / 41卷 / 05期
关键词：
pulsed electrodeposition; nanocrystalline; Co-Ni-Fe deposits; 3.5%NaCl solution; corrosion characteristic; MECHANICAL-PROPERTIES; GRAIN-SIZE; BEHAVIOR; NICKEL;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocrystalline Co-Ni-Fe alloys were synthesized by pulsed electrodeposition. The composition, microstructure and surface morphologies were studied by EDS, XRD, TEM and SEM. The effect of Co content and grain sizes on the electrochemical corrosion behaviour of nanocrystalline Co-Ni-Fe deposits in 3.5wt% NaCl solution were investigated using Tafel polarization curves. The results reveal that the grain sizes of the nanocrystalline fcc Co-Ni-Fe alloys descrease with increasing of the content of Co in the coating. The grain sizes of nanocrystalline Co-Ni-Fe alloys increase with increasing of the annealing temperature, showing a strong (111) texture. The corrosion rates of Co-Ni-Fe alloys decrease first and then increase with increasing of the Co content in the coating. The corrosion rates decline gradually with increasing of the annealing temperature. Comparing to the nanocrystalline deposits, the coarse grain deposit exhibits a quite a different corrosion morphologies.
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页码：851 / 856
页数：6
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