为了增强钛金属双极板的耐腐蚀性能,通过多弧离子镀膜技术在钛基双极板表面镀一层TiN,对薄膜的表面形貌,晶体结构与耐腐蚀性能之间的关系进行研究.结果表明:镀有TiN膜样品的耐腐蚀性能比未镀膜样品的有明显提高,其腐蚀电流密度最低可达201 μA/cm2.测试其动电位极化曲线和恒电位极化曲线发现,样品的耐腐蚀性能与薄膜的晶体结构以及表面颗粒和孔洞有密切的关系.适当的晶体择优取向有利于提高样品的耐腐蚀性能,而表面的颗粒和孔洞对样品的长期耐腐蚀性有很大影响.通过能谱分析发现,腐蚀后的样品表面发生了氧化.
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