| 316L不锈钢在含氯高温醋酸溶液中的自钝化行为 |
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| 引用本文： | 程学群,李晓刚,杜翠薇.316L不锈钢在含氯高温醋酸溶液中的自钝化行为[J].北京科技大学学报,2006,28(9):840-844. |
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| 作者姓名： | 程学群 李晓刚 杜翠薇 |
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| 作者单位： | 北京科技大学材料科学与工程学院腐蚀与防护中心,北京,100083 |
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| 基金项目： | 中国石油化工集团公司资助项目
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国家科技基础条件平台建设计划 |
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| 摘 要： | 研究了316L不锈钢在85 ℃,含0.2% KCl的60%醋酸溶液中的自钝化行为. 通过测试试样的恒电流阴极极化曲线,以及恒电流阴极极化后开路电位随时间的变化曲线,提出了316L不锈钢钝化膜的结构模型. 该模型认为316L不锈钢钝化膜由三层构成:最外层主要是由Fe的氧化物以及少量Cr的氧化物组成;第二层主要是Cr的氧化物,含有少量Fe,Mo和Ni的氧化物;最底层主要是Mo,Ni的氧化物和少量的Fe原子. 研究发现: 316L不锈钢在实验醋酸溶液中,经10 mA阴极电流极化15 min后钝化膜生长参数γ最大,而经0.45 mA阴极电流极化30 min后钝化膜生长参数γ最小;316L不锈钢在实验醋酸溶液中,经10 mA阴极电流极化30 min后,自钝化电位最小,而经1 mA阴极电流极化15 min后,自钝化电位最大. 钝化膜结构模型能很好地解释316L不锈钢在实验醋酸溶液中的上述电化学行为.
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| 关 键 词： | 电化学 不锈钢 钝化膜 醋酸 不锈钢 含氯 高温 醋酸溶液 钝化行为 acid solution acetic stainless steel 化学行为 解释 膜结构模型 钝化电位 最小 生长参数 阴极极化曲线 阴极电流 实验 发现 原子 组成 |
| 收稿时间： | 2005-06-22 |
| 修稿时间： | 2005-09-26 |
Self-passivating behavior of 316L stainless steel in high-temperature acetic acid solution |
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| CHENG Xuequn,LI Xiaogang,DU Cuiwei.Self-passivating behavior of 316L stainless steel in high-temperature acetic acid solution[J].Journal of University of Science and Technology Beijing,2006,28(9):840-844. |
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| Authors: | CHENG Xuequn LI Xiaogang DU Cuiwei |
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| Institution: | Corrosion and Protection Center, Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083 China |
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| Abstract: | The self-passivating behavior of 316L stainless steel in acetic acid solution was studied. The constant current polarization curve and the corrosion potential-to-time curve were measured. The results showed that passivation film was formed by three layers: oxides of Fe and small amount Cr in the first layer; oxides of Cr and small amount Fe, Mo, Ni in the second layer; and oxides of Mo, Ni and small amount Fe in the third layer. The structure model of passivation film can explain the electrochemical results well. |
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| Keywords: | electrochemistry stainless steel passivation film acetic acid |
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