| 金属镁在腐蚀介质中界面结构特征与负差数据效应关系研究 |
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| 引用本文： | 李瑛,宋光铃,林海潮等. 金属镁在腐蚀介质中界面结构特征与负差数据效应关系研究[J]. 腐蚀科学与防护技术, 1999, 11(4): 202-208 |
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| 作者姓名： | 李瑛 宋光铃 林海潮等 |
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| 作者单位： | [1]中科院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室 [2]中科院金属腐蚀与防护研究所金属腐蚀与防护国家重 |
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| 基金项目： | 国家自然科学基金,百人计划资助项目 |
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| 摘 要： | 复扫描隧道显微镜，在微观尺度观察腐蚀界面形貌特征，发现ＰＨ＝１１的１ｍｏｌ／ＬＮａＣｌ水溶液中，金属镁表面形成块状氧化物，但微观尺度上氧化厚度不均，阳极化后块状氧化物尺度变小，保护作用降低，导致镁金属溶解出现负差数效应，金属镁在０．５ｍｏｌ／ＬＮａ２ＳＯ４和１ｍｏｌ／ＬＮａＣｌ两种介质中都产生负差数效应，但氧化膜结构不同，负差数效应强弱有别。
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| 关 键 词： | 负差数效应 界面形貌 STM 镁 |
STUDY ON THE RELATIONSHIP BETWEEN THE CORROSION INTERFACE STRUCTURE AND NEGATIVE DIFFERENCE EFFECT FOR PURE MAGNISUIM |
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| LI Ying,SONG Guangling,LIN Haicao,CAO Chunan =. STUDY ON THE RELATIONSHIP BETWEEN THE CORROSION INTERFACE STRUCTURE AND NEGATIVE DIFFERENCE EFFECT FOR PURE MAGNISUIM[J]. Corrosion Science and Protection Technology, 1999, 11(4): 202-208 |
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| Authors: | LI Ying SONG Guangling LIN Haicao CAO Chunan = |
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| Abstract: | The negative difference effect(NDE) phenomenon of magnesium has been studied by electrochemical measurement and STM. After observing the morphology characteristics on magnesium by STM in nanoscale, the newPartially Protective Film mechanism is proposed to explain the NDE phenomena. There were many oxide pieces which did not bulk up on the magnesium surface and the magnesium would be dissolved under the defect of oxide pieces when the anodic potential or current were applied on the electrode. It was shown that the possibility and the degree of NDE were decided by the structure of oxide on the magnesium electrode.= |
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| Keywords: | pure Mg interface morphology negative different effect STM |
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