Gravimetric Measurement of Oxygen Evolution during Anodizing of Aluminum Alloys

被引：13
|
作者：
Torrescano-Alvarez, J. M. [1 ]
Curioni, M. [1 ]
Skeldon, P. [1 ]
机构：
[1] Univ Manchester, Sch Mat, Corros & Protect Grp, Manchester M13 9PL, Lancs, England
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2017年 / 164卷 / 13期
基金：
英国工程与自然科学研究理事会;
关键词：
PLASMA ELECTROLYTIC OXIDATION; TIME HYDROGEN MEASUREMENT; MAGNESIUM; CORROSION; FILMS; BEHAVIOR; BUBBLES;
D O I：
10.1149/2.0371713jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A gravimetric method based on changes in buoyancy force of a submerged gas-collecting container has been optimized to measure the evolution of oxygen during anodizing of an aluminum alloy. Previously, the gravimetric method has been used to measure hydrogen evolution from magnesium and aluminum during corrosion processes, either at the free corrosion potential or under relatively low polarization. However, during anodizing, the comparatively higher values of current applied and the heating effects associated with power dissipation might introduce artefacts in the gas measurement. Optimization of the experimental setup enabled reduction or elimination of such artefacts, so that a reliable measurement could be obtained. The results show that typically about 15 to 20% of the current applied to an AA 2024-T3 aluminum alloy during anodizing in sulfuric acid under the present conditions was used in generating oxygen. (c) The Author(s) 2017. Published by ECS. All rights reserved.
引用
收藏
页码：C728 / C734
页数：7
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