石油与天然气化工Issue(2)：78-82,5.DOI:10.3969/j.issn.1007-3426.2015.02.017
离子渗氮对 X80钢在库尔勒土壤溶液中电化学腐蚀行为的影响
Effect of plasma nitriding on electrochemical corrosion behavior of X80 pipeline steel in Kuerle soil simulated solution
摘要
Abstract
This paper studied the corrosion resistance of X80 steel in Kuerle soil simulated solution for 30 days after the surface of X80 steel was treated by plasma nitriding.The influence of plasma ni-triding layer of X80 steel on corrosion property was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).The results showed that the corrosion resistant of plasma nitriding treated specimen are more stronger than the raw X80 steel,with a corrosion potential of about -393 mV and a corrosion current density of about 0.046 μA·cm-2 ,which are about 337 mV higher than X80,and only about 1/1 000 of the corrosion current density of X80 steel.Compared with the X80 steel,theεphase andγ′phase by nitrides increased the corrosion potential significantly, which caused the happen of corrosion reaction more difficultly,and reduced the corrosion current den-sity greatly.The surface morphology and composition of corrosion products were investigated by SEM,XRD and EDS.The result indicated that the corrosion products were mainly composed ofβ-FeOOH and Fe3 O 4 .关键词
离子渗氮/X80 管线钢/电化学腐蚀/土壤模拟溶液/库尔勒Key words
plasma nitriding/X80 pipeline steel/electrochemical corrosion/soil simulated solu-tion/Kuerle分类
能源科技引用本文复制引用
孙彦伟,陈吉..离子渗氮对 X80钢在库尔勒土壤溶液中电化学腐蚀行为的影响[J].石油与天然气化工,2015,(2):78-82,5.基金项目
辽宁省自然科学基金(201202127)。 （201202127）
