论文部分内容阅读
制备了新型镁包铝复合牺牲阳极,利用交流阻抗图谱和极化曲线比较分析了铝阳极、镁阳极和复合阳极的活性,并结合自放电试验与实海测试分析了复合阳极用于跨海大桥钢结构阴极保护的可行性。交流阻抗图谱和极化曲线显示复合牺牲阳极的活性介于铝阳极和镁阳极之间;自放电实验表明在阳极与阴极面积比为1:120时复合阳极的阴极保护电位由-1.1V过渡到-1.0V;实海测试实验表明复合阳极保护下阴极保护电位稳定在-1.0～-0.95V,基本达到海洋工程对Q235钢阴极保护电位的要求。
A new magnesium-clad aluminum composite sacrificial anode was prepared. The activity of aluminum anode, magnesium anode and composite anode were compared and analyzed by AC impedance spectroscopy and polarization curves. Combined with self-discharge test and real-sea test, Feasibility of cathodic protection of steel structure. AC impedance spectroscopy and polarization curves show that the composite sacrificial anode activity is between the aluminum anode and the magnesium anode; self-discharge experiments show that when the anode to cathode area ratio of 1: 120, the cathodic protection potential of the composite anode transitions from -1.1V to -1.0V. The experimental results show that the cathodic protection potential is stable at -1.0 ~ -0.95V under the composite anode protection, which basically meets the requirements of ocean engineering for the cathodic protection potential of Q235 steel.