Effect of Simulated Trapped Solution on Corrosion of X80 Steel in Acidic Soil Environment

ZHAO Bo; DU Cui-wei; LIU Zhi-yong; LI Xiao-gang; LI Yue-qiang

Corrosion & Protection > 2013 > 34(5): 371-375.

ZHAO Bo, DU Cui-wei, LIU Zhi-yong, LI Xiao-gang, LI Yue-qiang. Effect of Simulated Trapped Solution on Corrosion of X80 Steel in Acidic Soil Environment[J]. Corrosion & Protection, 2013, 34(5): 371-375.

Citation:

PDF (1775 KB)

Effect of Simulated Trapped Solution on Corrosion of X80 Steel in Acidic Soil Environment

More Information

Received Date: November 19, 2012

Graphical Abstract

Abstract

Abstract

The changes in the nature of trapped solution in Yingtan acid soil simulation solution were in-situ measured with rectangular disbonded model, and the simulated trapped solution of early and late corrosion were matched. The properties of the solutions were analyzed by potentiodynamic polarization curves, electrochemical impedance spectroscopy, and micro-morphology. The results showed that the contents of Cl-, Na+ and K+ increased, the dissolved oxygen content and pH reduced at the late stage of disboned corrosion. At the same time, the corrosion current density increased, the charge transfer resistance (Rct) decreased, the protective corrosion product films were destroyed seriously, and pitting extent increased significantly. Compared with the bulk solution and early corrosion solution, the trapped solution was more aggresive.
- X80 steel,
- disbanded area,
- trapped solution,
- corrosion,
- electrochemistry

FullText(HTML)

References (25)

References

[1]	Deflorian F, Rossi S. An EIS study of ion diffusion through organic coatings[J].Electrochimica Acta, 2006,51(8/9):1736-1744.
[2]	Bervers J A, Thompson N G. Corrosion beneath disbonded pipeline coatings[J].Materials Performance,1997,36(4):13-19.
[3]	Sabde G M. Modeling transport process and current distribution in a cathodically protected crevice[J].Corrosion,2000,41(8):783-793.
[4]	刘智勇,董超芳,贾志军, 等. X70钢在模拟潮湿存储环境中的点蚀行为[J].金属学报, 2011,47(8):1009-1016.
[5]	Galvele J R. Tafel’s law in pitting corrosion and crevice corrosion susceptibility[J].Corrosion Science, 2005,47(12):3053-3067.
[6]	Liu Z Y, Li X G, Du C W, et al. Local additional potential model for effect of strain rate on SCC of pipeline steel in an acidic soil solution[J].Corrosion Science,2009,51(12):2863-2871.
[7]	Bi H, Sykes J. Cathodic disbonding of an unpigmented epoxy coating on mild steel under semi- and full-immersion conditions[J].Corrosion Science, 2011, 53(10):3416-3425.
[8]	严大凡,翁永基,董绍华, 等.油气长输管道风险评价与完整性管理[M].北京:化学工业出版社, 2005.
[9]	Wang R G. Influence of ultrasound on pitting corrosion and crevice corrosion of SUS304 stainless in chloride sodium aqueous Solution[J].Corrosion Science,2008,50(2):325-328.
[10]	He X, Dunn D S, Csontos A A. Corrosion of similar and dissimilar metal crevices in the engineered barrier system of a potential nuclear waste repository[J].Electrochimica Acta,2007,52(10):7556-7569.
[11]	Chen X, Li X G, Du C W, et al. Effect of cathodic protection on corrosion of pipeline steel under disbonded coating[J].Corrosion Science,2009,51(9):2242-2245.
[12]	Han D, Jiang Y M, Shi C, et al. Effect of temperature, chloride ion and pH on the crevice corrosion behavior of SAF 2205 duplex stainless steel in chloride solutions[J].Journal of Materials Science,2012,47(2):1018-1025.
[13]	Gan F, Sun Z W, Sabde G, et al. Cathodic protection to mitigate external corrosion of underground steel pipe beneath disbanded coating[J].Corrosion,1994,50(10):804-816.
[14]	Perdomo J J, Cawley J D. Chemical and electrochemical conditions on steel under disbanded coating:mathematical modeling of mass tranport and chemical changes in crevices[J].Corrosion Science,2001,19(5):419-434.
[15]	陈旭,杜翠薇,李晓刚, 等.阴极极化条件下X70钢的缝隙腐蚀行为[J].金属学报,2008,44(12):1431-1438.
[16]	Yang M Z, Wilmott M, Luo J L. Crevice corrosion behavior of A516-70 carbon steel in solutions containing inhibitors and chloride ions[J].Thin Solid Films,1998,326(1/2):180-188.
[17]	杨佳星,赵平,孙成, 等.埋地管线钢缝隙腐蚀的机理与防护研究进展[J].全面腐蚀控制,2010,24(4):16-19.
[18]	刘智勇,李晓刚,杜翠薇, 等.管道钢在土壤环境中应力腐蚀模拟溶液进展[J].油气储运,2008,27(4):34-37.
[19]	李正奉,毛旭辉,甘复兴.阴极保护下缝隙内的电位和电流分布[J].中国腐蚀与防护学报,2000,20(6):338-343.
[20]	Cheng C M, Beck F H Fontana M G, Crevice effect during polarization of Ti-1Al-1Mo-1V alloy in aqueous and methanol environments[J]. Corrosion,1971,27(6):234-238.
[21]	Al-Zahrani A M, Pickering H.W. IR voltage switch in delayed crevice corrosion and active peak formation detected using a repassivation-type scan[J].Electrochimica Acta,2005,50(16/17):3420-3435.
[22]	宋义全,杜翠薇,张新, 等.Cl-浓度对X70管线钢缝隙腐蚀的影响[J].金属学报,2009,45(9):1130-1134.
[23]	陈旭,杜翠薇,梁平, 等.酸性土壤环境中X70 钢缝隙腐蚀行为的研究[J].科学通报, 2008,53(23):2839-2847.
[24]	Fu A Q, Tang X, Cheng Y F. Characterization of corrosion of X70 pipeline steel in thin electrolyte layer under disbonded coating by scanning Kelvin probe[J].Corrosion Science,2009,51(1):186-190.
[25]	Pickering H W.The Significance of the local electrode potential with pits crevices and cracks[J].Corrosion Science,1989,29(2):325-341.

Cited By

Get Citation

PDF

XML

Article views (0) PDF downloads (2)

Turn off MathJax

Article Contents

Abstract

References

Effect of Simulated Trapped Solution on Corrosion of X80 Steel in Acidic Soil Environment

Abstract

References

Catalog

Export File

Citation

Format

Content