作者用热分解法制备钛基IrO2+Ta2O5涂层阳极,涂层制备态在373 K马弗炉中长时间时效处理,然后在0.5mol/L H2SO4介质中、4A·cm-2电流密度下进行强化寿命试验.用自带能谱仪(EDS)的场发射高分辩电子扫描显微镜(SE-SEM)和X射线衍射仪(XRD)进行电解前后的表面形貌和成分分析.研究结果显示涂层制备态在373K马弗炉中长时间时效处理时,金红石IrO2织构优先生长且晶面间距随时效时间延长而增加;电解过程中涂层的失效过程为:气体氧对涂层界面的冲刷造成涂层逐层腐蚀消耗,接着涂层产生裂纹和扩展,导致涂层剥落;化学成分方面,涂层氧化铱优先消耗和氧化钛逐步积累.
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