Characterization of Cr-α-Al2O3 Composite Coatings Electrodeposited from Cr(III) Plating Bath

被引：0
|
作者：
Sun, Xin [1 ]
He, Xiangzhu [1 ]
Wang, Yongxiu [1 ]
Fu, Zhihong [1 ]
机构：
[1] Guangdong Univ Technol, Fac Chem Engn & Light Ind, Guangzhou 510006, Guangdong, Peoples R China
来源：
FRONTIERS OF MANUFACTURING AND DESIGN SCIENCE II, PTS 1-6 | 2012年 / 121-126卷
关键词：
Cr-alpha-Al2O3; composite coating; trivalent chromium; corrosion resistance; CHROMIUM DEPOSITS; BEHAVIOR; RESISTANCE; CORROSION; ALLOYS;
D O I：
10.4028/www.scientific.net/AMM.121-126.60
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cr-alpha-Al2O3 composite coatings were prepared by direct current deposition experiments from Cr(III) plating bath and the thickness of composite coatings could be up to 14 mu m. The obtained Cr-alpha-Al2O3 coatings and Cr coatings were characterized by means of EDS, SEM and microhardness measurement. Results revealed that Cr-alpha-Al2O3 coatings exhibit fine-grained structure with uniform surface and the highest microhardness values(692 HV) when the alpha-Al2O3 content of coatings was 15g/L, although some pores and defects are still present in the coatings. Analysis of Tafel curves indicated that the presence of alpha-Al2O3 in the Cr coatings show better features in the corrosion resistance both in H2SO4 and NaOH solution than those prepared from the bath without alpha-Al2O3.
引用
收藏
页码：60 / 64
页数：5
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