城镇燃气埋地钢质管道防腐蚀现状

Current Situation of Corrosion Protection for Urban Gas Buried Steel Pipelines

燃气管网是城市能源供给的生命线,腐蚀危害是影响埋地钢质燃气管道安全运行的重要因素,近年来国内发生了多起由腐蚀引起的钢质燃气管道泄漏爆炸事件,引起了国家和各地政府的广泛关注。结合城镇燃气埋地钢质管道服役时间、环境特点,从防腐蚀层、阴极保护系统分析了城镇燃气埋地钢质管道防腐蚀措施的施加历史与现状以及杂散电流的影响,总结了城镇燃气防腐蚀工作迫切需要解决的关键问题,并提出了相关建议,从而为城镇燃气管网的安全运行提供参考。

Gas pipeline network is the lifeline of urban energy supply,and corrosion hazard is an important factor affecting the safe operation of buried steel gas pipelines.In recent years,many gas leakage and explosion incidents have occurred on buried gas steel pipelines induced by corrosion in China,which has attracted extensive attention of the state and local governments.Combined with the service time,environmental characteristics,the application history and current situation of corrosion protection measures of urban gas buried steel pipelines was systematically analyzed from anti-corrosion coating,cathodic protection and the effects of stray current,and the corrosion and protection problems that need to be solved urgently in corrosion protection work of urban gas pipelines were summarized,which could provide reference for the safe operation of urban gas pipeline network.