Stress Corrosion Cracking of X80 Pipeline Steel in Near-Neutral pH Environment under Constant Load Tests with and without Preload

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (11): 1039-1046.

• Iron and Steel • Previous Articles Next Articles

Stress Corrosion Cracking of X80 Pipeline Steel in Near-Neutral pH Environment under Constant Load Tests with and without Preload

Y.Z. Jia^1,2), J.Q. Wang¹⁾, E.H. Han¹⁾, W. Ke¹⁾

1) State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2) Department of Electromechanical Engineering, Sichuan College of Architectural Technology, Deyang 318000, China

Received:2011-03-03 Revised:2011-04-07 Online:2011-11-30 Published:2011-11-29
Contact: J.Q. Wang
Supported by:
the National Natural Science Foundation of China (Grant No. 51025104)

Abstract

Abstract: Constant load tests in NS4 solution purged with N₂-5%CO₂ gas mixture were conducted on American Petroleum Institute (API) X80 pipeline steel applied in the 2nd West-East Gas Pipeline project with and without preload. The results show that cracks could initiate and propagate in X80 pipeline steel in near-neutral pH environment under a constant load condition. The life of crack initiation and propagation increased with decreasing applied stress. Preload
did not change its corrosion behavior obviously. However, preload reduced the time for crack initiation.

Key words: Stress corrosion cracking, X80 pipeline steel, Near-neutral pH solution, Preload

Y.Z. Jia, J.Q. Wang, E.H. Han, W. Ke. Stress Corrosion Cracking of X80 Pipeline Steel in Near-Neutral pH Environment under Constant Load Tests with and without Preload[J]. J Mater Sci Technol, 2011, 27(11): 1039-1046.

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Stress Corrosion Cracking of X80 Pipeline Steel in Near-Neutral pH Environment under Constant Load Tests with and without Preload

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