体彩排列5质合遗漏

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简析埋地管道防腐及其质量控制

2019-05-08 17:13:37

埋地管道较佳的防腐方法是对其施加防腐蚀涂层并附加阴极保护。基于管道涂层材料的透水性和透气性,其木身也会有漏点、小孔等,涂层无法实现对腐蚀介质进行的隔离。加之涂层会在管道运输、装卸、施工时也会有所损伤,在管道理地后受土壤环境的影响或第三方破坏等均会导致腐蚀介质通过涂层缺陷与管道金属表面发生腐蚀,所以管道防腐不能仅靠涂层的隔离作用。如果理地管道的涂层保护属于较基木的第 一层保护的话,那么对理地管道施加阴极电流,实现阴极极化,则属于理地管道的不可缺少的保护。理地管道较基木的第 一层保护降低了保护所需的保护电流,而保护则弥补了第 一层保护的缺陷。

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