Composite plasma electrolytic oxidation to improve the thermal radiation performance and corrosion resistance on an Al substrate

被引：32

作者：

Kim, Donghyun ^{[1
]}

Sung, Dahye ^{[1
,2
]}

Lee, Junghoon ^{[3
]}

Kim, Yonghwan ^{[2
]}

Chung, Wonsub ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea

[2] Korea Inst Ind Technol KITECH, Busan 46742, South Korea

[3] Stevens Inst Technol, Dept Mech Engn, Hoboken, NJ 07030 USA

来源：

APPLIED SURFACE SCIENCE | 2015年 / 357卷

关键词：

Plasma electrolytic oxidation; Composite; Corrosion resistance; Radiation; Emissivity; ALUMINUM-ALLOY; MAGNESIUM ALLOY; COATINGS; SURFACE; EMISSIVITY; SOLIDIFICATION; AL2O3; OXIDE;

D O I：

10.1016/j.apsusc.2015.10.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A composite plasma electrolytic oxidation (PEO) was performed for enhancing the thermal radiation performance and corrosion resistance on an Al alloy by dispersing cupric oxide (CuO) particles in a conventional PEO electrolyte. Cu-based oxides (CuO and Cu2O) formed by composite PEO increased the emissivity of the substrate to 0.892, and made the surface being dark color, similar to a black body, i.e., an ideal radiator. In addition, the corrosion resistance was analyzed using potentio-dynamic polarization and electrochemical impedance spectroscopy tests in 3.5 wt.% NaCl aqueous solution. An optimum condition of 10 ampere per square decimeter (ASD) current density and 30 min processing time produced appropriate surface morphologies and coating thicknesses, as well as dense Cu- and Al-based oxides that constituted the coating layers. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1396 / 1402

页数：7

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