Study on DC Stray Current Corrosion and Control of 90/10 Copper-nickel Seawater Pipe
-
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。Abstract: 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.
-
-
[1] 杨辉,杨瑞.某船海水管路泄漏失效原因分析[J].材料开发与应用, 2016, 31(3):28-32. [2] 赵书华,李晓,王树立,等.埋地管道直流杂散电流腐蚀及防护的研究进展[J].材料保护, 2020, 53(5):123-128. [3] 李长春,李志宏,王晨,等.埋地钢质管道直流杂散电流腐蚀机理及影响因素研究[J].中国新技术新产品, 2017(1):50-51. [4] 尚兴彬,胡乃科,胡威,等.阴极保护系统中直流杂散电流对管道的干扰研究[C].第二届石油化工腐蚀与安全学术交流会,2016:116-119. [5] 王璐.钢板桩码头靠泊船杂散电流腐蚀研究[D].大连:大连理工大学, 2008. [6] 任厚珉,张振邦,梁成浩,等.修造船期间杂散电流腐蚀的电力线分布研究[J].腐蚀科学与防护技术, 1999, 11(6):369-372. [7] 刘宾.案例法浅析船舶杂散电流腐蚀问题[J].中国水产, 2009(10):64-65. [8] QIU W, PAGANO M, ZHANG G, et al.A Periodic Voltage Modulation Effect on the Corrosion of Cu-Ni Alloy[J].Corrosion Science, 1995,37(1):97-110.
[9] 邢少华,杨光付,刘广义,等.船舶海水管路直流杂散电流仿真研究[J].装备环境工程, 2021, 18(9):93-100. [10] 中华人民共和国国家发展和改革委员会.埋地钢质管道直流排流保护技术标准:SY/T 0017-2006[S].北京:石油工业出版社, 2007. [11] 国家石油和化学工业局.埋地钢质管道交流排流保护技术标准:SY/T 0032-2000[S].北京:石油工业出版社, 2001. [12] ZAKOWSKI KRZYSZTOF, DAROWICKI KAZIMIERZ, ORLIKOWSKI JULIUSZ.Electrolytic Corrosion of Water Pipeline System in the Remote Distance from Stray Currents-Case Study[J].Case Studies in Construction Materials, 2016,4:116-124.
[13] DIN EN 50162-2005.Protection Against Corrosion by Stray Current from Direct Current Systems[S].Brussele.European Committee for Electrotechnical Standardization, 2004.
[14] GUO YAN BAO, MENG TAN HAI, WANG TAO, et al.Effects of Alternating Current Interference on the Cathodic Protection for API 5L X60 Pipeline Steel[J].Journal of Natural Gas Science&Engineering, 2016:414-423.
[15] 中华人民共和国工业和信息化部.船体杂散电流腐蚀的防护方法:CB/T 3712-2013[S].2014.
计量
- 文章访问数: 129
- HTML全文浏览量: 48
- PDF下载量: 17
下载:
