Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract: Galvanostatic pulse measurement (GPM) was introduced as a new non-destructive technique to monitor corrosion of X80 pipeline steel in a red soil environment. Corrosion rate and double layer capacitance of the metal/soil interface for X80 pipeline steel in red soil were measured by GPM, and then the acquired data were compared with those measured by polarization method. Results show that the galvanostatic pulse method is applicable for monitoring soil corrosion of the steel and it can provide a nondestructive analytical probe into double layer characteristics at soil/steel interface. The polarization resistance measurement indicated that corrosion rate of the steel decreased with time in the water saturated red soil.
Subjects: Materials Science >> Materials Science (General) submitted time 2017-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract:探索适用于我国油气田老管线的外腐蚀检测技术和评价方法是保证油气安全生产运营的重要方面。本试点项目利用交流电流衰减法(PCM)、直流电位梯度法(DCVG)和密间距管地电位测试法(CIPS)等技术对新疆油田三化(北三台?乌石化站)原油管道开展了外腐蚀综合检测和评价。检测评价内容包括:沿线土壤腐蚀性调查、防腐层完整性、阴极保护有效性、直/交流杂散电流干扰等间接检测及开挖直接检验。综合检测发现防腐层老化、破损严重,发现破损点592处,沿线长度约39.2km的管段管地电位不满足阴极保护电位标准。基于系统检测和综合评价结果,提出了管道外防腐蚀层修复与阴极保护调整方案。