Stress corrosion cracking behavior of X80 steel in artificial seawater under controlled strain rate and applied potentials
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The effect of applied potential on the stress corrosion cracking (SCC) behavior of X80 steel was examined in artificial seawater (ASW) at different strain rates of 1×10−4, 1×10−5 and 1×10−6/sec. The controlled potential of −650, −850, −950 and −1,050 mVSCE, respectively, was applied during strainig. It was found that X80 steel was susceptible to SCC in seawater environment under both anodic and cathodic applied potentials and the susceptibility was sensitive to strain rate. The SCC was initiated at the surface pits under an anodic applied potential of -650 mVSCE. The effect of cathodic applied potential on the SCC behavior of X80 steel in ASW was more complex, such that the combined effect of surface damage, including pits and hydrogeninduced cracking, and hydrogen concentration generated on the surface tended to determine the SCC susceptibility. The SCC behavior of X80 steel with different applied potentials in ASW was discussed based on the microstructural and the fractographic observations.
Keywordsalloys thermomechanical processing corrosion scanning electron microscopy (SEM) X80 steel
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- 2.S. Y. Shin, S. M. Hong, J. H. Bae, K. S. Kim, and S. H. Lee, Met. Mater. Int. 47, 155 (2009).Google Scholar
- 5.J. K. Kwon, D. H. Ahn, D. H. Jeong, Y. J. Kim, N. S. Woo, and S. S. Kim, Korean J. Met. Mater. 52, 757 (2014).Google Scholar
- 10.D. P. Baxter, S. J. Maddox, and R. J. Pargeter, 26th Int. Conf. on Offshore Mech. & Arctic Eng., p.117, ASME, San Diego, USA (2007).Google Scholar
- 11.NORSOK and Materials Selection, NORSOK Standard M-503, Rev. 2, Norway (1997).Google Scholar
- 13.J. Billingham, J. V. Sharp, J. Spurrier, and P. J. Kilgallon, Research Report 105, Review of the Performance of High Strength Steels Used Offshore, Health and Safety Executive (HAE) Books, Cranfield (2003).Google Scholar
- 14.H. Arup, Corros. Eng. Sci. Tech. 26, 169 (1991).Google Scholar
- 16.M. Bobby Kannana, W. Dietzelb, R. K. Singh Ramana, and P. Lyond Scripta, Materialia 57, 579 (2007).Google Scholar
- 23.STM Standard D1141, Standard Specification for Substitute Ocean Water, Annual book of ASTM Standards, 11.02. (1990).Google Scholar
- 24.ASTM Standard G129, Standard Practice for Slow Strain Rate Testing to Evaluate the Susceptibility of Metallic Materials to Environmentally Assisted Cracking, Annual book of ASTM Standards, 03.02. (2000).Google Scholar