北京科技大学学报2011，Vol.33Issue(9)：1116-1121,6.
Sn对Mg-Al-Sn-Zn系海水电池用镁阳极材料组织及电化学性能的影响
Effect of tin on the microstructure and electrochemical properties of Mg-AI-Sn- Zn magnesium alloy anodic materials for seawater batteries
王萍 1李建平 1郭永春 1杨忠1
作者信息
- 1. 西安工业大学材料与化工学院,西安710032
- 折叠
摘要
Abstract
The morphologies, microstructure and composition distribution of magnesium alloy anodic materials for seawater batteries were studied by metallographic microscopy, X-ray diffraction （XRD） , scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS）. The corrosion behavior and electrochemical properties of the Mg alloys were also investigated by the constant current method, potential polarization and collecting gas through drainage. The results showed that tin restrained β-Mg17 Al12 phase precipi- tation along grain boundaries. With the content of tin increasing, granular Mg2Sn phase improved. After uniform heat treatment, most of β-Mg17Al12 phase dissolved, but most of Mg2Sn phase did not. Tin could improve the self-corrosion potential and the release hydrogen rate. The magnesium alloy anode with 1% tin had high discharge potential and current efficiency. With the current density increasing, the release hydrogen rate augmented. The current efficiency reached 82.28% at 20mA·cm ^-2. The main compositions of the corrosion products were MgO and Al2O3 which were easily peeled off. As a result, more negative and stable work potential was produced and the reaction was accelerated continuously.关键词
海水电池/阳极材料/镁合金/电化学性能/锡Key words
seawater batteries/anodic materials/magnesium alloys/electrochemical properties/tin分类
矿业与冶金引用本文复制引用
王萍,李建平,郭永春,杨忠..Sn对Mg-Al-Sn-Zn系海水电池用镁阳极材料组织及电化学性能的影响[J].北京科技大学学报,2011,33(9):1116-1121,6.
