Ni-SiC纳米复合镀层腐蚀行为的研究

中国腐蚀与防护学报

2011, Vol. 31

Issue (5): 371-376

研究报告

本期目录 | 过刊浏览

Ni-SiC纳米复合镀层腐蚀行为的研究

王平¹,程英亮¹,张昭²

1. 湖南大学材料科学与工程学院长沙 410082
2. 浙江大学玉泉校区化学系杭州 310027

CORROSION BEHAVIOR OF THE Ni-SiC NANOCOMPOSITE COATINGS

WANG Ping¹, CHENG Yingliang¹, ZHANG Zhao²

1. College of Materials Science and Engineering, Hunan University, Changsha 410082
2. Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027

全文: PDF(1434 KB)

摘要: 通过电化学阻抗谱测试技术初步确定制备具有较好耐腐蚀性能镀层的工艺参数。利用扫描电子显微镜观察镀层的表面形貌；借助浸泡实验、电化学阻抗谱、极化曲线等方法对比分析了Ni-SiC纳米复合镀层和纯Ni镀层在0.5 mol/L NaCl溶液和1 mol/L HNO₃ 溶液中的耐腐蚀性能。结果表明，SiC纳米颗粒的加入提高了镀层的耐腐蚀性能，且镀层耐腐蚀性能随镀层中SiC纳米颗粒含量的增加而提高。

关键词 ：电沉积, Ni-SiC纳米复合镀层, 耐腐蚀性能, 电化学阻抗谱

Abstract：Ni-SiC nanocomposite coatings were prepared by means of the conventional electrocodeposition method. The technological parameters that make the nanocomposite coatings have a better corrosion resistance in 0.5 mol/L NaCl solution were preliminarily determined by using electrochemical impedance spectroscopy test（EIS）. By comparing the charge transfer resistance of the coatings, it is shown that coatings prepared with current density range of 15 mA/cm²~20 mA/cm² and SiC content of 6 g/L have better corrosion resistance. The structure of coatings were investigated by scanning electron microscopy（SEM）. The corrosion resistance of Ni-SiC nanocomposite coatings and pure nickel coatings in 0.5 mol/L NaCl solution and 1 mol/L HNO₃ solution was analyzed by immersion tests, electrochemical impedance spectroscopy and polarization curves. As immersion time prolonged in 0.5 mol/L NaCl solution, the charge transfer resistance of Ni-SiC nanocomposite coatings and pure nickel coatings reduced rapidly at initial stage and then became stable at later stage. Moreover, the charge transfer resistance of Ni-SiC nanocomposite coatings were higher than those of pure nickel coatings at the most of the immersion time. In addition, the charge transfer resistance of coatings containing SiC particles were 2 to 5 times higher than those of coatings without SiC particles when they were immersed in 1 mol/L HNO₃ solution for 0.5 h. So the SiC nano-particles were helpful to improve the corrosion resistance of the coatings, which increased with increasing SiC content in the coatings. The effect of SiC nano-particles on the corrosion resistance was discussed in details.

Key words： electrodeposition Ni-SiC nanocomposite coatings corrosion resistance electrochemical impedance spectroscopy

收稿日期: 2010-04-06

ZTFLH:

TQ153

基金资助:

国家自然科学基金项目（50771092）资助

通讯作者: 程英亮 E-mail: deepblacksea@163.com

Corresponding author: CHENG Yingliang E-mail: deepblacksea@163.com

作者简介: 王平，女，1986年生，硕士生，研究方向为复合电镀

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引用本文:

王平,程英亮,张昭. Ni-SiC纳米复合镀层腐蚀行为的研究[J]. 中国腐蚀与防护学报, 2011, 31(5): 371-376.
CHENG Yang-Liang. CORROSION BEHAVIOR OF THE Ni-SiC NANOCOMPOSITE COATINGS. J Chin Soc Corr Pro, 2011, 31(5): 371-376.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I5/371

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