Influence of Saccharin Sodium on Microstructure and Performance of Electrodeposited Nanocrystalline Ni Coating

摘要：

Nanocrystalline nickel (nc-Ni) coatings were prepared by pulse electrodeposition method. Their structure was investigated by SEM, TEM and XRD, and their microhardness, thermal stability and corrosion resistance were studied by a microhardness tester, DSC and potentiometer respectively. It is found that the grain size of nc-Ni coating decreases with the increased, the smallest grain size is achieved at 10g/L. With a saccharin concentration less than 15 g/L in electrolyte, the surface of the electrodeposit is smooth and bright. The microhardness of nc-Ni coatings reaches the tops when content of C7H4NO3SNa-2H2O is 10g/L. The relationship between the grain size and microhardness fits for the Hall-Petch function, approximately. The instability growth temperature of nc-Ni coatings is slightly fluctuated at 305℃ under different content of C7H4NO3SNa-2H2O.The corrosion resistance of nc-Ni coatings is optima when the content of C7H4NO3SNa-2H2O is 10g/L.

关键词： nanocrystalline nickel coating microstructure performance pulse electrodeposition

作者: BA Zhi-xin DAI Yu-ming ZHANG Zhen-zhong ZHOU Jian-qiu ZHANG Shao-ming

作者单位: College of Material Science and Engineering,Nanjing University of Technology,Nanjing,China Departmen Department of Material Engineering,Nanjing Institute of Technology,Nanjing,China College of Material Science and Engineering,Nanjing University of Technology,Nanjing,China

会议类型: 国际会议

会议名称: The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)

会议地点: 北京

会议语种:英文

页码: 621-625

在线出版日期: 2009-10-27（万方平台首次上网日期，不代表论文的发表时间）