稀土铈对Fe-3Cr钝化膜电化学腐蚀行为的影响

中国腐蚀与防护学报, 2008, 28(6): 363-368. doi: 10.3969/j.issn.1005-4537.2008.06.010

稀土铈对Fe-3Cr钝化膜电化学腐蚀行为的影响

李党国 ^1, , 冯耀荣 ^2, , 白真权 ^3, , 郑茂盛 ^4,

1.西安交通大学材料科学与工程学院,西安,710049;中国石油天然气集团公司管材研究所,西安,710065

2.中国石油天然气集团公司管材研究所,西安,710065

3.中国石油天然气集团公司管材研究所,西安,710065

4.西安交通大学材料科学与工程学院,西安,710049

基金项目: 国家重点基础研究发展计划(973计划)(G1999065004) 国家自然科学基金(50231020)

关键词：电容测试法 , 电化学阻抗谱 , 半导体性能 , 施主密度

EFFECT OF CERIUM ON THE ELECTRONIC PROPERTY OF PASSIVE FILM FORMED ON Fe-3Cr ALLOY

利用电容测试法和电化学阻抗谱技术研究了稀土Ce对Fe-3Cr合金在1 mol/L NaHCO3+0.5 mol/L Na2CO3缓冲溶液中所形成的钝化膜电化学腐蚀行为的影响.结果表明:稀土Ce能大大降低钝化膜内的施主密度,使膜电阻和离子在膜内的传递电阻增大,导致离子在膜内的扩散能力降低.稀土的加入可以增强基体合金在含有Cl-缓冲溶液中的耐腐蚀性能.

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稀土铈对Fe-3Cr钝化膜电化学腐蚀行为的影响

EFFECT OF CERIUM ON THE ELECTRONIC PROPERTY OF PASSIVE FILM FORMED ON Fe-3Cr ALLOY

参考文献