摘要
研究了Ti/(IrO2+Ta2O5)涂层阳极钛基表面不同改性条件下的表面形貌,截面扫描和界面元素分布,电解强化寿命和失效机理。结果表明,钛基体表面改性对涂层表面形貌没有根本性影响,表面改性的涂层阳极在槽电压-电解时间曲线上具有很长的平台期,显示出很好的强化寿命,平台期的主要失效特点在于涂层的电化学溶解,溶解从“龟裂”处始发,并且逐层进行。
The surface morphology, elements distribution at he interface between coating and matrix, accelerated life time test and failure mechanism were discussed under the conditions of different sublayer surface modifications for Ti/（IrO2＋Ta2O5） anodes such as special surface treatment （SST）, metal Ta and Pt modification. The results show that Ti based surface modification has no basal influence on the surface morphology, the anodes have very long term accelerated life time at the flat stage with different surface modifications. Electrolysis dissolve of oxides is the main failure mechanism for the anode at the flat stage starting from island banks.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第12期1916-1919,共4页
Rare Metal Materials and Engineering
基金
上海教育委员会青年基金(203170)
关键词
钛阳极
失效机理
电解
二氧化铱
五氧化二钽
titanium anodes
failure mechanism
electrolysis
iridium oxide （IrO2）
tantalum pentoxide （Ta2O5）
