90/10铜镍合金海水管路直流杂散电流腐蚀及控制研究  

Study on DC Stray Current Corrosion and Control of 90/10 Copper-nickel Seawater Pipe

作　　者：邢少华 杨光付 隋永强 仝宏韬 刘雪辉 XING Shaohua;YANG Guangfu;SUI Yongqiang;TONG Hongtao;LIU Xuehui(Science and Technologyon Marine Corrosion and Protection Laboratory,Luoyang Ship Material Research Institute,Qingdao 266237,China;Naval Research Academy of PLA,Beijing 100073,China)

机构地区：[1]中国船舶集团有限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：《材料开发与应用》2022年第4期41-48,共8页Development and Application of Materials

摘　　要：针对某船90/10铜镍合金海水管路系统异常快速腐蚀问题,采用失重法、电化学法、微观形貌分析等方法研究了90/10铜镍合金海水管路系统直流杂散电流腐蚀规律,对比分析了直接排流法和牺牲阳极保护法对直流杂散电流腐蚀控制的效果。结果表明,90/10海水管路直流杂散电流腐蚀速率随着杂散电流强度增加而线性增加,晶界优先发生腐蚀溶解;直接排流法和牺牲阳极保护法均可抑制直流杂散电流腐蚀,但牺牲阳极保护法对强直流杂散电流腐蚀防护效果有限,直接排流法可对90/10铜镍合金海水管路直流杂散电流腐蚀进行有效保护。In order to solve DC stray current corrosion problem of seawater pipe in ship,in this paper,weight loss experiment,electrochemical measurement,SEM and EDS analysis are carried out to study the influence of DC stray current on the corrosion of 90/10 copper-nickel and the control effect of direct electric drainage and sacrificial anode protection.The experimental results show that corrosion rate of 90/10 copper-nickel linearly increases with the increase of DC stray current and corrosion preferentially occur in the grain boundary.DC stray current corrosion can be controlled by both direct electric drainage and sacrificial anode protection,and the control effect of direct electric drainage is better than that of sacrificial anode.

关 键 词：海水管路 直流杂散电流 腐蚀 直接排流法 牺牲阳极保护 

分 类 号：TG172.5[金属学及工艺—金属表面处理]