期刊论文

中文

中国腐蚀与防护学报

1005-4537

2012

32

3

262-266

湖南省农业大学***基金项目（11YJ10）资助；

本校为第一机构

为获得高强耐蚀的镁稀土合金,采用扫描电镜、X射线衍射分析、腐蚀失重法、电化学阻抗和动电位极化等研究了元素Ce对Mg-9Gd-4Y-1Nd-0.6Zr合金微观组织和耐蚀性的影响。结果表明添加0.5%Ce后合金耐腐蚀性能较好,合金的腐蚀电流密度为不含铈合金的55.6%,腐蚀电位正移约141 mV。适量Ce元素的加入导致其他稀土元素在晶界处富集并呈网状分布,使第二相粒子尺寸变小,体积分数变大。

To obtain high strength and good corrosion resistance of Mg-9Gd-4Y-1Nd-0.6Zr alloy, effects of Ce on microstructure and corrosion resistance of Mg-9Gd-4Y-1Nd-0.6Zr magnesium alloy was investigated by means of scanning electron microscopy, X-ray diffraction, corrosion mass loss test, electrochemical impedance spectroscopy and potentio-dynamic polarization test. The Mg alloy with 5% Ce shows better corrosion re- sistance. Its corrosion current density decreased about 55.6~. Its corrosion potential moved positive about 141 mV than that of Mg-9Gd-4Y-1Nd-0.6Zr alloy. Rare earth elements in the Mg a...