Electrodeposition of an aluminum coating on a graphite surface from a molten AlCl3-NaCl-KCl mixture

被引：0

作者：

Cao, Rui-Xiong ^{[1
,2
]}

Tao, Ze-Chao ^{[1
]}

Wang, Hong-Bao ^{[1
]}

Guo, Quan-Gui ^{[1
]}

机构：

[1] Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan,030001, China

[2] University of Chinese Academy of Sciences, Beijing,100049, China

来源：

Xinxing Tan Cailiao/New Carbon Materials | 2015年 / 30卷 / 03期

关键词：

Adhesion - Aluminum - Aluminum alloys - Aluminum chloride - Aluminum coatings - Current density - Deposition rates - Graphite - Mixtures - Potassium compounds - Reduction - Sodium chloride - Sodium hydroxide - Thermal conductivity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An electrochemical method was used to deposit aluminum on a graphite plate in a molten NaCl-KCl-AlCl3 mixture with a weight ratio of 1:1:8 to form a coatings with different thicknesses. The thickness and morphology of the coating were controlled by the current density and electrochemical deposition time. Results indicated that the thickness of the coating increased with deposition time up to 240 min at a current density of 1.06 A/dm2 and a dendritic structure coating was formed by increasing the deposition time beyond 300 min. The greater the current density, the faster the deposition rate. When the current density was increased to 3.28 A/dm2, the thickness of the coating reached a maximum of 148 μm for an electrochemical deposition time of 120 min. Excellent adhesion strength between the aluminum coating and graphite substrate was proved by thermal shock resistance and scratch hardness tests. The thermal conductivity of the samples was increased significantly from an initial value of 115.7 to 199.0 W/(m·K). ©, 2015, Editorial Board of New Carbon Materials. All right reserved.

引用

页码：282 / 288