title: [Preparation of electrodeposited Cr-La coating and its spectral properties].
abstract: Cr-La coating (dc) and Cr-La coating (pulse) were prepared by electrodeposition method of direct current and pulsating current respectively. The Cr-La coating (dc) and Cr-La coating (pulse) were characterized with ICP-AES, EDAX, XRD and SEM techniques, respectively. Cr-La coating(dc) was amorphous. There were crystalline La and CrC in Cr-La coating (pulse). The microhardness of the Cr-La coating(dc) and Cr-La coating (pulse) were as high as 860.3 and 930.2 HV respectively, which were higher 11.15% and 20.18% higher than that of the Cr coating (774.0 HV). The wear weight losses of Cr-La coating(dc) and Cr-La coating(pulse) were 1.29 and 2.25 times lower than that of Cr coating, respectively. The friction coefficient of Cr coating, Cr-La coating(dc) and Cr-La coating(pulse) were 0. 884, 0. 640 and 0. 648 respectively. The properties of wear weight loss and microhardness of coatings were improved with pulsating current. The wear weight loss and microhardness of Cr-La coating(pulse) were lower 1.75 time lower and higher 8.13% higher than that of the Cr-La coating(dc), respectively.
authors.affiliation: School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, China. liuxiaozhen1958@yahoo.com
authors.forename: Xiao-zhen
authors.initials: XZ
authors.lastname: Liu
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Ling-ling
authors.initials: LL
authors.lastname: Song
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Xu-qiang
authors.initials: XQ
authors.lastname: Zhu