石锟¹,冯磊²,姚力³,李微微¹,王树博¹,谢晓峰^1,4

• 1:清华大学核能与新能源技术研究院，北京 100084
• 2:中国空间技术研究院北京卫星制造厂有限公司，北京 100094
• 3:上海汽车集团股份有限公司前瞻技术研究部，上海 201804
• 4:清华大学山西清洁能源研究院，山西 太原 030032

摘要(Abstract)：

为了研究金属双极板TiCr膜层的氯离子腐蚀规律和机理，采用磁控溅射方法制备以316L不锈钢为基体，TiCr为导电膜层的双极板材料。针对燃料电池和固体聚合物电解水电解池的内部溶液容易被氯离子污染的实际情况，借助电化学极化曲线和交流阻抗谱（EIS），考察了电解质溶液中氯离子浓度对TiCr膜层耐蚀性的影响。并且，通过分子模拟软件对氯离子影响合金膜腐蚀速率的机理进行了动力学模拟。测试和分子模拟结果表明，合金膜的腐蚀速率随氯离子含量的增加而增加，氯离子通过与合金钝化膜表面处金属原子之间的吸附-溶解过程，实现对膜层的加速腐蚀。

关键词(KeyWords)： 金属双极板;腐蚀机理;分子模拟;氯离子

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2016YFE0102700）；山西省科技重大专项项目（20181101006）。

作者(Author): 石锟¹,冯磊²,姚力³,李微微¹,王树博¹,谢晓峰^1,4

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