某L245钢油气输送管道的穿孔原因

Perforation Cause of L245 Steel Oil Pipeline

某L245钢油气输送管道在壁厚检测时发现多处穿孔。通过壁厚测量、腐蚀产物分析、输送介质成分分析以及对管材的化学成分分析、力学性能测试和组织形貌分析等方法,对管道穿孔的原因进行了分析。结果表明:管道局部腐蚀导致其发生了腐蚀穿孔,输送介质中的HCO3-与Cl-协同作用是引起局部腐蚀的主要原因。

Several holes were found in wall thickness test on a L245 steel oil pipeline. Causes of pipeline perforation were analyzed by means of wall thickness measurement, corrosion products analysis, transmission medium composition analysis and chemical composition analysis, mechanical property test, morphology analysis of pipeline. The results show that the corrosion perforation was caused by local corrosion in pipeline, and the synergistic effect of HCO3-and Cl-in transmission medium was the main cause of local corrosion.