Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-27T01:45:54.375Z Has data issue: false hasContentIssue false
  • English
  • Français

Fracture Behavior on SCC of API X52 Pipeline Steel Under Cathodic Protection

Published online by Cambridge University Press:  01 February 2011

A. Contreras ,
M. A. Espinosa-Medina  and
R. Galvan-Martínez
A. Contreras
Affiliation:
Instituto Mexicano del Petróleo, Eje central Lázaro Cárdenas Norte 152, San Bartolo Atepehuacan, C. P. 07730, México. E-mail: [email protected]
M. A. Espinosa-Medina
Affiliation:
Escuela de Ingeniería Mecánica de la Universidad Michoacana, Morelia, Mich. México
R. Galvan-Martínez
Affiliation:
Unidad Anticorrosión, Instituto de Ingeniería, Universidad Veracruzana, Av. S.S. Juan Pablo II s/n, Fracc. Costa Verde, Veracruz, México, CP 94294
Get access

Abstract

This paper analyzes the fracture behavior and mechanisms of stress corrosion cracking (SCC) of API X52 pipeline steel. Susceptibility and mechanism of SCC was investigated using slow strain rate tests (SSRT) performed at strain rate of 1 × 10−6 in/sec in a glass autoclave containing a soil solution with pH of 8.5 at room temperature. Cathodic polarization potentials of −100, −200 and −400 mV referred to Ecorr was applied in order to establish the effectiveness of cathodic protection in mitigating SCC of X52 pipeline steel. To study the effects of several over potential in SSRT were performed at different cathodic potentials. The results of reduction area ratio (RAR), time to failure ratio (TFR) and plastic elongation ratio (PER) indicate that X52 pipeline steel was susceptible to SCC. Scanning electron microscopy (SEM) observations of these specimens showed a brittle type of fracture with transgranular appearance. The failure and SCC mechanism of X52 steel in the soil solution was hydrogen based mechanism. This mechanism was confirmed through the internal cracks observed in these specimens. All cracking tests indicated that the SCC rate was enhanced by plastic deformation.

Keywords

FractureCorrosionEmbrittlementStress/Strain relationship
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1275: Structural and Chemical Characterization of Metals, Alloys and Compounds , 2010 , S3-P55
Copyright
Copyright © Materials Research Society 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Fang, B. Y., Eadie, R. L., Chen, W. X. and Elboujdaini, M., Corrosion Engineering, Science and Technology, 45, 302–312 (2010).Google Scholar
2. Fang, B.Y., Atrens, A., Wang, J.Q., Han, E.H., Zhu, Z.Y. and Ke, W., Journal of Materials Science, 38, 127–132 (2003).Google Scholar
3. Zhang, X. Y., Lambert, S.B., Sutherby, R. and Plumtree, A., Corrosion. 55, 297–305 (1999).Google Scholar
4. Liu, Z.Y., Li, X.G., Du, C.W., Zhai, G.L., Cheng, Y.F., Corrosion Science 50, 2251–2257(2008).Google Scholar
5. Beavers, J. A. and Harle, B. A., Journal of Offshoere Mechanics and Arctic Engineering, 123, 147–151(2001).Google Scholar
6. Krist, K. and Leewis, L., Pipeline & Gas Journal, 49–52 (1998).Google Scholar
7. Bulger, J. and Luo, J., “Effect of microstructure on near-neutral pH SCC” International Pipeline Conference (IPC) ASME 2000, 947–952 (2000).Google Scholar
8. Li, X.C., Eadie, R.L. and Luo, J.L., Corrosion Engineering, Science and Technology, 43(4), 297–303, (2008).Google Scholar
9. Benmoussat, A. and Hadjel, M., Journal of Corrosion Science and Engineering, 7, 1–14, (2005).Google Scholar
10. Qiao, L. J., Luo, J. L., Journal of Materials Science Letters, 16, 516–520, (1997).Google Scholar
11. NACE TM-0198 Slow Strain Rate Test Method for Screening Corrosion-Resistant Alloys (CRAs) for Stress Corrosion Cracking in Sour Oilfield Service, 1–21, (2004).Google Scholar
12. ASTM G-129, Slow strain rate testing to evaluate the susceptibility of metallic materials to environmentally assisted cracking, 1–7, (2006).Google Scholar
13. Lu, B.T. and Luo, J.L., Corrosion, 62, 129–140 (2006).Google Scholar
14. Materials Research Society, Symposium Proceedings Vol. 1242, Edited by Campos, Ramiro Pérez, Cuevas, Antonio Contreras and Muñoz, Rodrigo Esparza, 43–51 (2010).Google Scholar
15. Lu, B. T. and Luo, J.L., Corrosion 62, 723–731 (2006).Google Scholar
16. Li, X.C., Eadie, R.L. and Luo, J.L., Corrosion Engineering Science and Technology 43, 297–303 (2008).Google Scholar
17. Kane, R. D., Joia, C.J.B.M., Small, A.L.L.T. and Ponciano, J.A.C., Materials Performance, 36, 71–74 (1997).Google Scholar
18. Rhodes, P. R., Corrosion, 57, 923–965 (2001).Google Scholar