海洋环境下X52管线钢的腐蚀行为研究

Study of Corrosion Behavior of X52 Steel in Marine Environment

李翌晨 谢飞 李健 张晓龙 赵阳 吴玉国

Yichen Li Fei Xie Jian Li Xiaolong Zhang Yang Zhao Yuguo Wu

辽宁石油化工大学 石油天然气工程学院, 辽宁 抚顺 113001 中海油天津分公司, 天津 300452 辽河油田油气集输公司, 辽宁 盘锦 124000

College of Petroleum Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China CNOOC Tianjin Branch，Tianjin 300452，China Liaohe Oil Field of CNPC，Panjin Liaoning 124000，China

海洋环境下的油气管道（X52管线钢）极易受到腐蚀的影响。采用电化学测试技术，并通过观察腐蚀形貌的方法，分析了海洋环境下溶解氧质量浓度、pH、静水压力对X52管线钢腐蚀行为的影响。结果表明，随着环境pH的升高，X52管线钢腐蚀减缓；随着溶解氧质量浓度和静水压力的升高，X52管线钢腐蚀加剧。在不同条件下，X52管线钢的腐蚀行为受阳极活化溶解控制，并且出现局部点蚀现象。

Oil and gas pipelines (X52 steel) in the marine environment are highly susceptible to corrosion. The effects of different dissolved oxygen concentration, pH, and hydrostatic pressure on the corrosion behavior of X52 pipeline steel in the marine environment was analyzed using electrochemical testing technology and observation of corrosion morphology. The results show that the corrosion of the pipeline slowed down as the ambient pH increased, while the corrosion of the pipeline steel increased as the dissolved oxygen content and hydrostatic pressure increased. The corrosion behavior of pipeline steel under different conditions is controlled by anodic activation of dissolution, and all appear local pitting corrosion phenomenon.

国家自然科学基金项目(51604150);辽宁省自然科学联合基金资助项目(2020?HYLH?14)

10.3969/j.issn.1672-6952.2022.05.004