稀土Ce对2A12铝合金耐蚀性的影响
Effect of Rare Earth Ce on Corrosion Resistance of 2A12 Aluminum Alloy
赵慧颖 1李涛 1曹阁 1范静 1孙明双1
作者信息
- 1. 内蒙古科技大学 材料与冶金学院,内蒙古 包头 014010
- 折叠
摘要
通过室内周期浸润腐蚀实验方法,研究了稀土Ce对 2A12 铝合金在含Cl-海洋大气模拟环境中的腐蚀行为.采用蔡司显微镜观察了铸态金相组织,用能量色散谱仪(EDS)分析了腐蚀产物元素组成.采用失重法分析了 2A12铝合金腐蚀动力学规律,采用电化学极化曲线分析了 2A12 铝合金腐蚀后的电化学行为.结果表明,稀土的加入使得2A12 铝合金的均匀性得到改善,腐蚀速率明显减小,腐蚀电流密度降低,腐蚀电压增加.稀土Ce的加入使得 2A12 铝合金锈层更致密而导致铝合金基体表面的电化学反应缓慢.
Abstract
The corrosive behavior of rare earth Ce on 2A12 aluminum alloy in a simulated atmosphere marine atmosphere containing Cl-was studied by alternate immersion accelerating test.The as cast micro-topography was observed by metallographic microscope,and the elemental composition of the corrosion products was analyzed by energy dispersive spectroscopy(EDS).The law of corrosion kinetics of 2A12 aluminum alloy was analyzed by weight loss method,and the electrochemical behavior of 2A12 aluminum alloy after corrosion was analyzed by electrochemical polarization curves.The results show that the addition of rare earth makes the uniformity of 2A12 aluminum alloy improve.The corrosion rate decreases obviously,the corrosion current density decreases,and the corrosion voltage increases.The addition of rare earth Ce makes 2A12 aluminum alloy rust layer more dense,which can cause the electrochemical reaction on the aluminum alloy substrate surface to be slow.
关键词
稀土Ce/2A12铝合金/腐蚀Key words
rare earth Ce/2A12 aluminum alloy/corrosion引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2014MS0525)
内蒙古自治区自然科学基金(2015MS0555)
出版年
2024
NETL
NSTL
万方数据