The passive film characterization and anodic polarization behavior of 11% Cr ferritic/martensitic and 15% Cr oxide dispersion strengthened steels in different electrolytic solutions
The passive film characterization and anodic polarization behavior of 11% Cr ferritic/martensitic and 15% Cr oxide dispersion strengthened steels in different electrolytic solutions
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DOI：
10.1016/j.apsusc.2013.03.059
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发表时间：
2013-06
影响因子：
6.7
通讯作者：
S. Ningshen;M. Sakairi;Kuniaki Suzuki;S. Ukai
中科院分区：
文献类型：
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作者：
S. Ningshen;M. Sakairi;Kuniaki Suzuki;S. Ukai
铁素体/马氏体（F/M）钢和氧化物弥散强化（ODS）钢是未来核电站最有前途的候选材料。本文研究了11% Cr F/M和15% Cr ODS钢在硼酸盐缓冲液、酸性、酸化氯化物和氯化物溶液中的钝化膜组成及其与阳极极化行为的关系。X射线光电子能谱分析表明，钝化膜中存在Cr2 O3和Fe 2 O3层，15%Cr ODS钢中沿着Y2 O3层。开路电位和动电位阳极极化曲线的测定结果表明，铝合金的耐点蚀性能与电解液和钝化膜的组成密切相关。ODS钢在含氯介质中的击穿电位比F/M钢高，钝化范围宽。在非氯化物环境中，这种差异并不突出。然而，两种钢在氯化物溶液中的低耐点蚀性归因于Cl−和微观结构的不均匀性。腐蚀表面形貌的SEM显微照片显示，在氯化物溶液中发生了严重的点蚀。本文研究了F/M钢和ODS钢在不同电解液中的阳极极化行为与钝化膜成分的关系。
The ferritic/martensitic (F/M) and oxide dispersion strengthened (ODS) steels are the most promising candidate materials for future nuclear power plants. In the present work, the passive film compositions and its correlation with anodic polarization behavior of 11% Cr F/M and 15% Cr ODS steels was examined in different electrolytic solutions of borate buffer, acidic, acidified chloride and in chloride solution. The X-ray photoelectron spectroscopy analysis of the passive film reveals the existence of the layers of Cr2O3and Fe2O3and in 15% Cr ODS steel along with Y2O3. The open circuit potential and potentiodynamic anodic polarization measurements show that pitting corrosion resistance is strongly dependent on electrolytic solutions and passive film compositions. The ODS steel indicated increased breakdown potential and wider passive range as compared to F/M steel in chloride containing media. In a non-chloride environment, this difference is not prominent. However, low pitting corrosion resistance of both steels in chloride solutions was attributable to Cl−and microstructural inhomogeneity. The SEM micrographs of surface morphology of corrosion attack showed severe pitting corrosion attack in chloride solutions. The anodic polarization behavior of F/M and ODS steels in different electrolytic solutions was studied for this work in relation to passive film compositions.