摘要
本论文讨论了交流杂散的来源、腐蚀机理、腐蚀特点,比较了国内外交流杂散的评价方法,以及国内对交流杂散的评价标准。基于工程实例,依据GB/T 50698-2011、SY/T 0087.6-2021对阴极保护和交流杂散数据进行评判,分析阴极保护下交流杂散对管道破损处的影响。监测数据和现场开挖结果说明,阴极保护合格避免了交流杂散腐蚀;国家标准GB/T 50698-2011对交流杂散的评判更具有实用性;阴极保护电位尽管不合格,管道中直流杂散干扰对交流腐蚀有一定的抑制作用;管道断电电位大于-850 mV时容易发生直流腐蚀。
This paper discusses the sources,corrosion mechanisms,and corrosion characteristics of communication clutter,compares the evaluation methods of communication clutter at home and abroad,as well as the evaluation standards for communication clutter in China.Based on engineering examples,evaluate cathodic protection and AC stray data according to GB/T 50698-2011 and SY/T 0087.6-2021,and analyze the impact of AC stray on pipeline damage under cathodic protection.Monitoring data and on-site excavation results indicate that cathodic protection is qualified to avoid AC stray corrosion;the national standard GB/T 50698-2011 has more practicality in evaluating stray communication;although the cathodic protection potential is not qualified,the direct current stray interference in the pipeline has a certain inhibitory effect on AC corrosion;when the power outage potential of the pipeline is greater than-850 mV,direct current corrosion is prone to occur.
作者
裴科飞
郭艳伟
唐国平
张佳旋
Pei Kefei;Guo Yanwei;Tang Guoping;Zhang Jiaxuan(Guangdong Institute of Special Equipment Inspection and Research,Foshan 528000,China)
出处
《广东化工》
CAS
2024年第23期94-96,132,共4页
Guangdong Chemical Industry
基金
广东省市场监督管理局科技项目(2023ZT02)《埋地钢质管道杂散电流腐蚀规律研究及评价》。
关键词
阴极保护
交流杂散
腐蚀
评价
cathodic protection
scattered communication
corrosion
evaluation
