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采用电化学测试、电偶腐蚀试验和腐蚀仿真计算方法综合研究了铁基牺牲阳极在海水环境下对铜合金管路提供阴极保护的效果。研究结果表明,海水环境下铁合金牺牲阳极与铜合金开路电位差值合理,在提供充分的阴极保护驱动电位的前提下,能够有效降低阳极材料的溶解速率,比锌合金阳极更适合于铜合金的阴极保护;铁基牺牲阳极在铜合金管路阴极保护过程中,保护电流发散受管路尺寸影响,一般可保护10倍管径范围区域。研究成果对于提高海水环境下铜合金管路的腐蚀安全性具有参考意义,具有良好的工程应用价值。
The effects of iron-based sacrificial anodes on cathodic protection of copper alloy pipes in seawater environment were comprehensively studied by using electrochemical test, galvanic corrosion test and corrosion simulation calculation method. The results show that the difference between the open-circuit potential of the sacrificial anode and the copper alloy in the seawater environment is reasonable. Under the premise of providing sufficient cathodic protection driving potential, the dissolution rate of the anode material can be effectively reduced, which is more suitable for the copper alloy than the zinc alloy anode Cathodic protection; Fe-based sacrificial anode in the copper alloy cathodic protection process, the protection of current divergence by the size of the pipeline, the general protection of 10 times the diameter range of the region. The research results have reference value for improving the corrosion safety of copper alloy pipes in seawater environment, and have good engineering application value.