Skip to main content Accessibility help
×
Home

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

  • A. Contreras (a1), M. A. Espinosa-Medina (a2) and R. Galvan-Martínez (a3)

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.

Copyright

References

Hide All
1. Fang, B. Y., Eadie, R. L., Chen, W. X. and Elboujdaini, M., Corrosion Engineering, Science and Technology, 45, 302312 (2010).
2. Fang, B.Y., Atrens, A., Wang, J.Q., Han, E.H., Zhu, Z.Y. and Ke, W., Journal of Materials Science, 38, 127132 (2003).
3. Zhang, X. Y., Lambert, S.B., Sutherby, R. and Plumtree, A., Corrosion. 55, 297305 (1999).
4. Liu, Z.Y., Li, X.G., Du, C.W., Zhai, G.L., Cheng, Y.F., Corrosion Science 50, 22512257(2008).
5. Beavers, J. A. and Harle, B. A., Journal of Offshoere Mechanics and Arctic Engineering, 123, 147151(2001).
6. Krist, K. and Leewis, L., Pipeline & Gas Journal, 4952 (1998).
7. Bulger, J. and Luo, J., “Effect of microstructure on near-neutral pH SCC” International Pipeline Conference (IPC) ASME 2000, 947952 (2000).
8. Li, X.C., Eadie, R.L. and Luo, J.L., Corrosion Engineering, Science and Technology, 43(4), 297303, (2008).
9. Benmoussat, A. and Hadjel, M., Journal of Corrosion Science and Engineering, 7, 114, (2005).
10. Qiao, L. J., Luo, J. L., Journal of Materials Science Letters, 16, 516520, (1997).
11. NACE TM-0198 Slow Strain Rate Test Method for Screening Corrosion-Resistant Alloys (CRAs) for Stress Corrosion Cracking in Sour Oilfield Service, 121, (2004).
12. ASTM G-129, Slow strain rate testing to evaluate the susceptibility of metallic materials to environmentally assisted cracking, 17, (2006).
13. Lu, B.T. and Luo, J.L., Corrosion, 62, 129140 (2006).
14. Materials Research Society, Symposium Proceedings Vol. 1242, Edited by Campos, Ramiro Pérez, Cuevas, Antonio Contreras and Muñoz, Rodrigo Esparza, 4351 (2010).
15. Lu, B. T. and Luo, J.L., Corrosion 62, 723731 (2006).
16. Li, X.C., Eadie, R.L. and Luo, J.L., Corrosion Engineering Science and Technology 43, 297303 (2008).
17. Kane, R. D., Joia, C.J.B.M., Small, A.L.L.T. and Ponciano, J.A.C., Materials Performance, 36, 7174 (1997).
18. Rhodes, P. R., Corrosion, 57, 923965 (2001).

Keywords

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

  • A. Contreras (a1), M. A. Espinosa-Medina (a2) and R. Galvan-Martínez (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed