Temperature effects on Al-Cr alloy deposition from acidic AlCl3-NaCl-KCl melts

被引：0

作者：

Morimitsu, M ^{[1
]}

Tsuda, T ^{[1
]}

Matsunaga, M ^{[1
]}

机构：

[1] Kyushu Inst Technol, Dept Appl Chem, Tobata Ku, Kitakyushu, Fukuoka 8048550, Japan

来源：

PROCEEDINGS OF THE ELEVENTH INTERNATIONAL SYMPOSIUM ON MOLTEN SALTS XI | 1998年 / 98卷 / 11期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Temperature effects on the electrodeposition of Al-Cr alloys from an acidic AlCl3-NaCl-KCl (61:26:13 m/o) melt were studied by voltammetry and chronoamperometry. The alloy deposition occurs at potentials more anodic than the reversible potential of aluminum at 230 degrees C and 270 degrees C. The deposition potential shifts cathodic with lowering temperature, and becomes more cathodic than the aluminum reversible potential at temperatures lower than 180 degrees C. Current transients analysis indicates that Al-Cr alloy deposits via a three-dimensional nucleation followed by the growth process under mixed kinetic and diffusion control at 230 degrees C and 270 degrees C. The nucleation process varies with temperature; a progressive nucleation at 230 degrees C and an instantaneous nucleation at 270 degrees C. No apparent evidence for a nucleation event was obtained at temperatures lower than 180 degrees C, although the current transients suggested the alloy deposition was under mixed kinetic and diffusion control.

引用

页码：34 / 39

页数：6