海水、淡水中铁基牺牲阳极的性能

利用恒电流试验测试了工业纯铁和35钢在海水和淡水中的牺牲阳极性能,利用电流阶跃阳极极化法测试了二者在海水和淡水中的极化性能。结果表明,工业纯铁和35钢在海水和淡水中具有良好的牺牲阳极性能,工作电位稳定,电流效率高,溶解均匀,但淡水中二者工作电位较正;极化开始时,较小电流密度(0.2 mA/cm2)下,极化程度最大,其后随电流增大,海水中二者极化电位基本维持稳定,而淡水中继续发生明显的极化,电位正移严重。

Performance of Iron-based Sacrificial Anodes in Seawater and Freshwater

In seawater and fresh water,the performance of ingot and 35 steel was measured by constant current experiment,and then their anodic polarization curves were drawn.Ingot and 35 steel had well performance of sacrificial anode,steady working potential,high current efficiency and uniform dissolution in sea water,but in freshwater their working potentials were more positive.The polarization degree of sacrificial anode was great when anodic polarization current density was 0.2 mA/cm2.Then their potentials in seawater kept stable in spite of increasing polarization current,but in freshwater the potentials moved in positive direction.