电流密度对发动机轴瓦喷射电沉积镍-纳米氧化铝复合镀层的影响
Effect of current density on nickel-nano-alumina composite coating jet-electrodeposited on engine bearing shell
王斌 1徐律 1张晓明 2马春阳3
作者信息
- 1. 无锡商业职业技术学院,江苏 无锡 214153;江苏省新能源汽车核心部件工程研究中心,江苏 无锡 214153
- 2. 奇瑞汽车股份有限公司,安徽 芜湖 241000
- 3. 东北农业大学工程学院,黑龙江 哈尔滨 150030
- 折叠
摘要
[目的]研究电流密度对发动机轴瓦表面喷射电沉积Ni-Al2O3复合镀层结构、耐磨性及耐蚀性的影响.[方法]通过表面形貌观察、X射线衍射分析、显微硬度检测、摩擦磨损试验及中性盐雾试验,对比了不同电流密度下所得Ni-Al2O3复合镀层的性能.[结果]当电流密度为60 A/dm2时,所得Ni-Al2O3复合镀层展现出最均匀致密的表面,晶粒尺寸最细小,显微硬度最高(约735.0 HV),同时具有最佳的耐磨性和耐蚀性.[结论]喷射电沉积Ni-Al2O3复合镀层能够显著提升发动机轴瓦的耐磨性和耐蚀性.
Abstract
[Introduction]The effect of current density on the structure,wear resistance,and corrosion resistance of Ni-Al2O3 composite coating jet-electrodeposited on the surface of engine bearing shell needs to be studied.[Method]The properties of Ni-Al2O3 composite coatings jet-electrodeposited at different current densities were compared through surface morphology observation,X-ray diffraction analysis,microhardness measurement,friction and wear test,and neutral salt spray test.[Result]The Ni-Al2O3 composite coating jet-electrodeposited at a current density of 60 A/dm2 exhibited the most uniform and compact surface with the smallest grain size,the highest microhardness about 735.0 HV,and the best wear and corrosion resistance.[Conclusion]The jet electrodeposition of Ni-Al2O3 composite coating can significantly enhance the wear and corrosion resistance of engine bearing shell.
关键词
喷射电沉积/发动机轴瓦/镍-氧化铝复合镀层/组织结构/显微硬度/耐磨性/耐蚀性Key words
jet electrodeposition/engine bearing shell/nickel-alumina composite coating/microstructure/microhardness/wear resistance/corrosion resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据