钠基膨润土防水毯对包裹埋地管道阴极保护的影响  

Effect of Sodium Based Bentonite Waterproof Blanket on Cathodic Protection of Wrapped Buried Pipelines

作　　者：李振军 LI Zhenjun(China Petroleum West Pipeline Co.,Ltd.,Urumqi 830011,China)

机构地区：[1]国家管网集团西部管道有限责任公司,乌鲁木齐830011

出　　处：《腐蚀与防护》2024年第10期111-115,共5页Corrosion & Protection

摘　　要：针刺覆膜法钠基膨润土防水毯具有永久性的防水效果,可减少油气泄漏对环境造成的污染,常应用于穿越环境保护区的管道,但其对所包裹管道的阴极保护影响尚不明确。开展了不同包裹形式下防水毯对管道阴极保护影响的模拟试验,并进行实际应用与效果检测,根据检测结果,分析了防水毯对其包裹管道阴极保护屏蔽的关键影响因素。结果表明:防水毯面电阻率很高,为9.1×10^(5)Ω·m^(2),绝缘性强;防渗垫开口结构不存在阴极保护屏蔽,可为防水毯包裹埋地管道阴极保护提供参考。The needle punched laminated sodium based bentonite waterproof blanket has a permanent waterproof blanket effect,which can reduce the pollution caused by oil and gas leaks to the environment.It is often used for pipelines crossing environmental protection areas,but its impact on the cathodic protection of the wrapped pipelines is not yet clear.Simulation experiments were conducted on the impact of waterproof blankets on pipeline cathodic protection under different wrapping forms,and practical application and effect testing were carried out.Based on the test results,the key influencing factors of waterproof blankets on the shielding of pipeline cathodic protection were analyzed.The results show that the surface resistivity of waterproof blankets was very high(9.1×10^(5)Ω·m^(2)),and had strong insulation properties.The anti-seepage pad opening structure did not have cathodic protection shielding,which could provide reference for cathodic protection of buried pipelines wrapped in waterproof blankets.

关 键 词：钠基膨润土防水毯 埋地管道 阴极保护 

分 类 号：TG174.41[金属学及工艺—金属表面处理]