高电位金属管路系统对船体钢结构的电偶腐蚀影响分析  

Analysis of the Galvanic Corrosion Effect of High-Potential Metal Piping Systems on Hull Steel Structures

作　　者：卢云飞[1] 郭倩 胡凌越 段国庆 石鹏飞 LU Yunfei;GUO Qian;HU Lingyue;DUAN Guoqing;SHI Pengfei(Wuhan Second Ship Design&Research Institute,Wuhan 430064,China)

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064

出　　处：《材料保护》2025年第4期122-130,共9页Materials Protection

摘　　要：为研究管路系统与船体结构的电偶腐蚀行为机制,针对钛合金管路系统在舰船领域中引发的电偶腐蚀问题,采用电化学测试、腐蚀仿真计算、模型腐蚀试验等手段,综合对比分析了钛合金管路系统与铜合金管路系统对船体钢结构的电偶腐蚀影响。结果表明:ZTi60、TC4、TA5和船体钢的电偶对电偶电位最终分别稳定在-0.60、-0.68、-0.61 V左右,电偶对电偶电流密度最终稳定值分别为5.58、10.11、5.84μA/cm^(2),铜合金和船体钢的电偶电流密度最终稳定值则明显大于钛合金。钛合金管路系统或铜合金管路系统与船体钢结构偶接时均存在电偶腐蚀效应,需要做好电绝缘防护措施,但钛合金管路系统与船体钢结构偶接后的电偶腐蚀效应并不会强于铜合金管路系统与船体钢结构偶接后的电偶腐蚀效应。In order to investigate the galvanic corrosion behavior mechanism between piping systems and hull structures,focusing on the gal-vanic corrosion issues of titanium alloy piping systems in naval ship applications,a comprehensive comparative analysis of the galvanic corro-sion effects on hull steel structures caused by titanium alloy and copper alloy piping systems was conducted using electrochemical testing,corro-sion simulation calculations and model corrosion experiments.Results showed that the galvanic potentials of the ZTi60,TC4,TA5 and hull steel couples eventually stabilized at approximately-0.60,-0.68 and-0.61 V,respectively,with the final stable galvanic current densities being 5.58,10.11 and 5.84μA/cm ^(2),respectively.Notably,the final stable current densities of the copper alloy couples were significantly higher than those of the titanium alloy couples.Both titanium alloy and copper alloy piping systems exhibited galvanic corrosion effects when coupled with hull steel structures,necessitating effective electrical insulation measures.Nonetheless,the galvanic corrosion effect of the titani-um alloy piping system and steel hull structure was not more pronounced than that of the copper alloy piping system and steel hull structure.

关 键 词：钛合金 铜合金 电偶腐蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]