The Impact of AC Stray Current on Pipeline Damage under Cathodic Protection
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.
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