Objective To study corrosion state of offshore oil jacket platform and ensure that the jacket is in the ca-thodic protection state. Methods The data in nearly three years obtained by the corrosion monitoring system were dis-cussed. According to data obtained by the potential current sensor in the different places, corrosion state of each observa-tion point was compared and analyzed. Results As the data research showed, the data collected by the potential current sensor this system was accurate and reliable. All electrode potential at node of jacket was in the range of protection. The output current of the sacrificial anode was stable in the current state. Conclusion The cathodic protection and monitoring system of the platform runs well. All of the measured points are protected and almost completely polarized. This result has an important reference value on the design and construction of offshore oil jacket platform.%目的 研究海洋石油平台腐蚀现状,确保导管架处于阴极保护状态.方法 对近3年导管架阴极保护监测系统所采集的数据进行讨论,根据不同位置的电位电流传感器所获得的数据进行各个观测点位的腐蚀状态对比分析.结果 通过对数据研究表明,该系统电位电流传感器所采集的数据翔实可靠,所收集到的导管架节点电极电位均在保护范围内.就现阶段而言,导管架牺牲阳极输出电流基本趋于稳定.结论 该平台阴极保护监测设备运行良好,所测点位均处于阴极保护状态,且基本达到完全极化,对该海域新建平台防腐设计具有重要的参考价值.
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