活性钛阳极性能的试验研究

Experimental research on the performance of activated Ti anode

阴极保护等电化学技术被越来越多地用于氯盐等严酷环境中钢筋混凝土结构的腐蚀保护,辅助阳极是整个保护系统的重要组成部分,其在混凝土中的工作性能和耐久性直接决定保护年限。选用了3种目前钢筋混凝土结构阴极保护中常用的活性涂层钛阳极,研究了涂层的化学成分和微观结构,以及在混凝土模拟孔溶液中的电化学性能和强化寿命。结果表明,涂层的成分和微观结构对它们在氯离子和高碱性的混合介质中的性能具有重要的影响,其中Ir/Ta混合氧化物阳极具有较好的电化学性能和耐久性,较适合于钢筋混凝土结构电化学保护中的辅助阳极。

Electrochemical technologies,such as cathodic protection,are used more and more to protect the reinforced concrete against the corrosion exposed to severe salty environment,of which the auxiliary anode is an important part of the protection system and its working performance and durability determine the service life.Three activated Ti anodes commonly used in cathodic protection are chosen for the study on the chemical components and microstructure of the protection coatings.The electro-chemical performance and accelerated life in simulated pore water of chloride contaminated concrete are also studied.Results show that the composition and microstructure have obvious effect on its performance in chloride and high pH solution.The Ir/Ta mixed oxide Ti anode has better electro-chemical performance and durability,and is applicable to electro-chemical protection for concrete structures.