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随着我国经济的飞速发展,城市地下燃气管网在国民生活中起到越来越重要的作用,例如,北京城市天然气供给管网管道总长已超过7500 km,并以每年10%左右的速度不断增加.天然气高度易燃易爆,管道一旦发生泄漏,就会给公共安全造成极大的威胁.在城市地下燃气管网失效事故中,1/3以上都是由腐蚀造成的,而埋地管道腐蚀的主要原因是防腐层失效,因此有必要对防腐层失效的主控因素进行深入研
With the rapid economic development in our country, underground gas pipelines in cities have played an increasingly important role in the national life. For example, the total length of gas pipelines in Beijing’s urban natural gas supply pipelines has exceeded 7,500 km and has been continuously increasing at a rate of about 10% per annum Increase.Gas highly flammable and explosive, once the pipeline leak, it will pose a great threat to public safety.In the city underground gas pipeline failure, more than 1/3 are caused by corrosion, and buried pipelines Corrosion is the main reason for the failure of anti-corrosion layer, it is necessary to prevent the failure of the main factors in-depth research