Corrosion Behavior of Commonly Used Four Pipeline Steels in Simulated Manzhouli Soil Solution
-
摘要: 采用动电位极化和交流阻抗技术研究了四种常用管线钢(Q235钢、20钢、X70钢和X80钢)在满洲里土壤模拟溶液中的腐蚀行为，并观察了它们的腐蚀形貌。结果表明：四种管线钢的极化曲线均呈典型的活化溶解特征;Q235钢、20钢、X70钢和X80钢的电极极化电阻和弥散指数均依次增大，氧化膜完整性和致密性依次增强，腐蚀速率依次减小;Q235钢发生了显著的全面腐蚀，腐蚀最严重;20钢同时发生全面腐蚀和局部腐蚀，腐蚀程度较Q235钢轻;X70钢和X80钢均以点蚀为主，前者腐蚀轻微，后者的腐蚀现象不明显。Abstract: Corrosion behavior of four commonly used pipeline steels (Q235 steel, 20 steel, X70 steel and X80 steel) in simulated Manzhouli soil solution were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS), and their corrosion morphology were observed.The results show that, the polarization curves of four pipeline steels all presented typical active dissolution characteristics in simulated Manzhouli soil solution. From Q235 steel, 20 steel, X70 steel to X80 steel, the electrode polarization resistance and diffusion index increased in turn, oxide film′s integrity and compactness enhanced in turn，and corrosion rate presented decreasing trend in turn. Q235 steel exhibited serious general corrosion, and it′s corrosion degree was the heaviest in the four kinds of steels. For 20 steel, general corrosion and local corrosion coexisted, and it′s corrosion degree was the lower than Q235 steel. X70 and X80 steels all mainly exhibited pitting corrosion, the corrosion degree of X70 steel was slight,while X80 steel′s corrosion was not obvious.
-
-
[1] 庄传晶, 冯耀荣, 霍春勇,等.国内X80级管线钢的发展及今后的研究方向［J］.焊管,2005,28(2):10-14. [2] 王燕,闰永贵,董超芳,等.涂层破损时杂散电流对Q235、16Mn、X70钢腐蚀的影响［J］.腐蚀科学与防护技术,2010,22(2):117-119. [3] 刘智勇,王力伟,杜翠薇,等. Q235钢和X70管线钢在北美山地灰钙土中的短期腐蚀行为［J］.北京科技大学学报, 2013, 35(8): 1021-1026. [4] 李红英,康巍,胡继东,等. X70和X80管线钢的电化学腐蚀行为［J］.材料热处理学报, 2011, 32(10):151-158. [5] 李辉辉,胥聪敏. X100管线钢在库尔勒土壤模拟溶液中的腐蚀行为［J］.机械工程材料, 2014, 38(3):75-79. [6] 宋维锡.金属学［M］.北京:冶金工业出版社,1989:5. [7] 王炳英.X80管线钢焊接管道应力腐蚀和断裂安全评定研究［D］.天津：天津大学,2007. [8] 曹楚南,张鉴清.电化学阻抗谱导论［M］. 北京:科学出版社, 2002:76-107. [9] 谢飞,吴明,陈旭,等.SO2－4对X80管线钢在库尔勒土壤模拟溶液中腐蚀行为的影响［J］.中南大学学报(自然科学版), 2013, 44(1): 425-430. [10] 杜翠薇,刘智勇,梁平,等.不同组织X70钢在库尔勒含饱和水土壤中的短期腐蚀行为［J］.金属热处理,2008,33(6):80-84. [11] 戚东涛,胥聪敏,丁楠,等.不同组织X80钢在水饱和碱性沙土中的腐蚀行为［J］.机械工程材料,2011,35(8):58-61. [12] HAMADOU L, KADRI A, BENBRAHIM N.Characterisation of passive films formed on low carbon steel in borate buffer solution by electrochemical impedance spectroscopy［J］.Applied Surface Science,2005,252(5):1510-1519. [13] GLASS G K, HASSANEIN A M, BUENFELD N R.Obtain in gimpedance information on the steel-concrete interface ［J］.Corrosion,1998,54:887-892. [14] 翟文,郑茂盛,白晶.X80管线钢钝化膜电化学性能的EIS研究［J］.西北大学学报(自然科学版), 2008, 38(3): 366-370. [15] 赵博,杜翠薇,刘智勇.剥离涂层下的X80钢在鹰潭土壤模拟溶液中的腐蚀行为［J］.金属学报, 2012, 48(12): 1530-1536. [16] 郭大伟,袁训华,顾宝珊,等.杯突变形对热镀锌合金化镀层耐腐蚀性的影响［J］.金属热处理, 2012,37(12): 74-78. [17] 赵阳,梁平,史艳华,等.NaHCO3溶液中X100和X80管线钢钝化膜性能比较［J］.中国腐蚀与防护学报, 2013, 33(6): 455-462. [18] 王振霞,贺志勇,王文波,等. Nb表面合金化对Ti6Al4V腐蚀行为的影响［J］.腐蚀科学与防护技术,2007,19(3): 196-199.
计量
- 文章访问数: 6
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
