DOI:10.11973fsyfh-202305001试验研究May2023CORROSION&PROTECTION2023年5月No.5Vol.44第44卷第5期腐蚀与防护不同含水量红壤中X80管道钢的腐蚀行为门立国1，²，霍冠良？，秦龙龙？，马玉宝？，闫茂成”，陈利琼！（1.西南石油大学，成都610599；2.国家管网集团西南管道有限责任公司，成都610000；3.中国科学院金属研究所，沈阳110016)摘要：通过开路电位、动电位极化曲线、电化学阻抗谱等电化学测试研究了不同含水量红壤中X80管道钢的腐蚀行为。结果表明：X80管道钢的自腐蚀电位、腐蚀速率、腐蚀类型均与红壤含水量及X80管道钢表面吸附薄液膜密切相关。随红壤含水量增大，X80管道钢表面吸附液膜的连续性增大，开路电位下降，腐蚀电流密度增大，X80管道钢的腐蚀模式从局部腐蚀变为均匀腐蚀。关键词：管道钢；土壤腐蚀；红壤；含水量；薄液膜中图分类号：TG172文献标志码：A文章编号：1005-748X（2023）05-0001-06CorrosionBehaviorofX8oPipelineSteelinRedSoilwithDifferentWaterContentMENLiguol*²,HUOGuanliang",QINLonglong",MAYubao”,YANMaocheng”,CHENLiqiong'(1.SouthwestPetroleumUniversity,Chengdu610599,China;2.SouthwestPipelineCo.,Ltd.,NationalPipeNetworkGroup,Chengdu610000,China;3.InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110016,China)Abstract:ThecorrosionbehaviorofX8opipelinesteelinredsoilwithdifferentwatercontentwerestudiedbyelectrochemicaltesting,includingopencircuitpotential,potentiodynamicpolarizationcurvesandelectrochemicalimpedancespectroscopy.Theresultsshowedthatthefreecorrosionpotential,corrosionrateandcorrosiontypeofX8opipelinesteelwerecloselyrelatedtothewatercontentofredsoilandthethinliquidfilmadsorbedonthesurfaceofX80pipelinesteel.Withtheincreaseofwatercontentofredsoil,thecontinuityofadsorbedliquidfilmonthesurfaceofX80pipelinesteelincreased,theopencircuitpotentialdecreasedandthecorrosioncurrentdensityincreased.Withtheincreaseofwatercontentofredsoil,thecorrosionmodeofX8opipelinesteelchangedfromlocalizedcorrosiontouniformcorrosion.Keywords:pipelinesteel;soilcorrosion;redsoil;watercontent;thinliquidfilm土壤腐蚀常引发管线泄漏，甚至突发爆炸等破坏事故，严重威胁管线运行安全。过去我国土壤腐蚀性评价及规律研究大都...
