90/10铜镍合金海水管路交流杂散电流腐蚀及控制研究  

AC Stray Current Corrosion and Control of 90/10 Copper-Nickel Alloy Seawater Pipe

作　　者：邢少华[1] 杨光付 刘广义[1] 仝宏韬 刘雪辉 XING Shao-hua;YANG Guang-fu;LIU Guang-yi;TONG Hong-tao;LIU Xue-hui(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Shandong Qingdao 266237,China;Naval Research Academy of PLA,Bejing 100073,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266237 [2]中国人民解放军海军研究院,北京100073

出　　处：《装备环境工程》2022年第4期95-100,共6页Equipment Environmental Engineering

摘　　要：目的针对杂散电流导致海水管路快速腐蚀问题,研究50、100 Hz交流杂散电流对海水管路腐蚀的影响,建立交流杂散电流腐蚀控制技术,为船舶海水管路交流杂散电流腐蚀控制提供技术支撑。方法采用失重法、电化学测试、扫描电镜与能谱分析等方法研究交流杂散电流频率和电压幅值对海水管路交流杂散电流腐蚀的影响规律以及直接排流法对海水管路交流杂散电流腐蚀的控制效果。结果90/10铜镍合金腐蚀速率随着交流杂散电流电压幅值的增加而增大,随着交流杂散电流频率的增加而减小,优先从90/10铜镍合金氧化膜薄弱部位发生腐蚀,当交流电压幅值增加到一定程度后,同时发生Cu溶解反应和Cu^(2+)还原反应。结论交流电气设备接地产生的泄漏电流会导致海水管路发生交流杂散电流腐蚀,采用直接排流法可对90/10铜镍合金海水管路进行有效保护。Aiming at the problem of rapid corrosion of seawater pipelines caused by stray currents,the influence of 50 Hz and 100 Hz AC stray currents on the corrosion of seawater pipelines is studied,and the AC stray current corrosion control technology is established to provide technical support for the AC stray current corrosion control of seawater pipelines of ships.The effect of AC stray current frequency and voltage amplitude on the corrosion law of seawater pipeline AC stray current and the control effect of direct electric drainage method on the corrosion of seawater pipeline AC stray current were studied by using weight loss,electrochemical test,SEM and EDS analysis.The experimental results show that corrosion rate of 90/10 copper-nickel alloy increases with the increase of the velocity amplitude of AC stray current and decreases with the increase of frequency of AC stray current,and corrosion preferentially occur in the unsubstantial positions of oxidization film.When the voltage amplitude of AC increases to some value,the dissolution reaction of Cu and reduction reaction of Cu^(2+) occur synchronously.The leakage current generated by the grounding of AC electrical equipment will lead to AC stray current corrosion of seawater pipelines,and the direct electric drainage method can effectively protect 90/10 copper-nickel alloy seawater pipelines.

关 键 词：管路 铜镍合金 交流杂散电流 腐蚀 直接排流法 防护 

分 类 号：TG172.5[金属学及工艺—金属表面处理]