混凝土阴极保护辅助阳极的电化学性能研究

Study on the Electrochemical Performance of MMO Titanium Mesh Anode

利用混凝土模拟液,采用恒电流极化以及循环伏安法,研究了常用于混凝土外加电流阴极保护的混合金属氧化物涂层(MMO)钛网阳极的电化学性能,并对阳极采用了加速寿命测试。结果表明:选用的MMO阳极,在含NaCl的混凝土孔模拟液中有较好的耐蚀性和工作稳定性,析氧电位在1.2 V左右,在工作电流为108 mA/m2时使用寿命可达到75年以上。

The electrochemical performance of MMO titanium mesh anodes was studied by using constant current po-larization and cyclic voltammetry in concrete pore simulation solution （SPS） with NaC1 addition. The accelerated life tes- ting of MMO titanium mesh anode were also carried out. Results showed that the MMO anode had a stable working per-formance, and oxygen evolution potential of MMO anode was about 1.2 V, the expected life of MMO anode can reach 75 years when its working current rating was 108 mA/m^2.