铝合金表面蓝色微弧氧化陶瓷膜的制备及性能研究*

doi:10.11896/j.issn.1005-023X.2017.010.025

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Abstract A blue ceramic coating was prepared on 5052 aluminum alloy by micro-arc oxidation in the manuscript. We syste-matically investigated the effects of the Co(OH)2 concentration and the applied voltage on the microstructure and the corrosion resis-tance. The OM, SEM and XRD were employed to characterize the macrostructure, microstructure and phase structure, respectively. The electrochemical corrosion resistance of coatings was measured by an electrochemical workstation in 3.5 wt% NaCl solution. The results show that the phase structure is mainly compose of γ-Al2O3. As the Co(OH)2 concentration and voltage increased, the blueness degree of coatings gradually deepen, and the color is the darkest when added 3.0 g/L Co(OH)2. Meanwhile, the surface tended to close and became denser. The results show that the corrosion resistance of ceramic coating is best with 1.0 g/L Co(OH)2 when the voltage was 140 V. We believe that the micro-arc oxidation technology of blue ceramic coating will have a wide range of applications in building materials and instrumentation industries as its gorgeous color and decorative function.

Key words： aluminum alloy micro-arc oxidation blue ceramic coating microstructure electrochemical corrosion

Published: 08 May 2018

CLC number:

TG174.453

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	Articles by authors
	CHEN Chao
	ZHANG Yuping
	CHEN Weiwei
	CHENG Huanwu
	WANG Lu

Cite this article:

CHEN Chao,ZHANG Yuping,CHEN Weiwei, et al. Preparation and Properties of Blue Ceramic Coating by Micro-arc Oxidation on Aluminum Alloy[J]. Materials Reports, 2017, 31(10): 121-126.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.010.025 OR http://www.mater-rep.com/EN/Y2017/V31/I10/121

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