【摘要】 采用熔盐法去除钛基氧化物阳极表面的失效涂层,通过X射线荧光光谱分析及粗糙度测量,考察了工艺条件对涂层去除效果的影响。通过循环伏安曲线、极化曲线、强化寿命测试分析了在去除失效涂层的钛基体上重涂修复所得到的钛阳极的电化学性能。结果表明,当KOH与KNO₃的质量比为5∶1、反应温度为450℃时,8 min可完全去除钛阳极表面的失效涂层,而又不会损伤钛基体及改变其表面粗糙度。修复后钛阳极的电化学性能与新制备的钛阳极相当,而成本仅为新制备钛阳极的57%,还可以回收贵金属。更多还原

【Abstract】 The failed coating on the surface of oxide-coated titanium anode was removed by molten salt method. The effects of process conditions on the removal of coating were studied by X-ray fluorescence spectroscopy and roughness testing. The electrochemical properties of the titanium-based anode repaired by recoating the titanium substrate on which the failed coating was removed were analyzed through cyclic voltammetry, polarization curve measurement, and accelerated service life testing. The results showed that the failed coating on titanium-based anode can be completely removed by reaction with KOH and KNO₃ at a mass ratio of 5:1 and temperate of 450℃ for 8 min, without any damage to the titanium substrate and change of its roughness. The repaired titanium-based anode has similar electrochemical properties to the freshly prepared one, while its cost is only 57% of the later. Noble metals can also be reclaimed.更多还原