Investigation of stress-corrosion cracking of welded joint of H70 steel under cathodic polarization in near neutral environment

Lyudmila Nyrkova; Pavlo Lisovyi; Larysa Gonchasrenko; Svetlana Osadchuk; Yulia Kharchenko; Anatoly Klymenko; Valery Kostin

doi:10.5937/zasmat2301096N

Authors

Lyudmila Nyrkova E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Pavlo Lisovyi E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Larysa Gonchasrenko E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Svetlana Osadchuk E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Yulia Kharchenko E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Anatoly Klymenko E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author
Valery Kostin E.O. Paton Electric Welding Institute of the National academy of sciences of Ukraine, Kyiv, Ukraine Author

DOI:

https://doi.org/10.5937/zasmat2301096N

Keywords:

pipe steel X70, welded joint, near-neutral environment, cathodic polarization, stresscorrosion cracking, slow strain rate test, voltammetry, fractography

Abstract

Study of stress-corrosion cracking of welded joints made of X70 steel at cathodic polarization in near neutral solution NS4 was carried out. It was established that the tendency of base metal of X70 steel to stress-corrosion cracking, estimated by KS coefficient, increases from 1.07 to 1.13 whereas polarization potential changing from the corrosion potential to maximum protective potential -1.05 V. Such regularity correlates with increasing of hydrogen penetration through X70 steel, which at maximum protective potential -1.05 V is equal to 0.000518 mol/m3 . Susceptibility of welded joint is lower than the base metal, KS coefficient change not much near the value 1.0. With increasing of polarization potential from -0,75V to -1.05V fracture surface of X70 steel characterized by decreasing in the size of holes and the appearance of flat areas, through that the rupture occurred. A similar nature of the rupture was observed for the welded joint, but visually larger proportion of flat areas can be noted. It was established that the rupture of the welded joint occurs on the base metal, which allows to propose stress-corrosion cracking susceptibility factor KS to be legitimately used for estimation to stress-corrosion cracking of welded joint, provided the weld is performed in a high-quality manner. Stress-corrosion cracking results of welded joint of X70 steel correlate satisfactorily with the experience of stress-corrosion cracking on main gas pipelines, where stress-corrosion cracks form and develop along the base metal of gas pipelines.

References

(2010) Unified system of corrosion and ageing protection: Metals, alloys, coatings, products: Test methods of hydrogen embrittlement. GOST R 9.915-2010

Unified system of corrosion and ageing protection: Metals, alloys, metallic and nonmetallic coatings: Permissible and impermissible contacts with metals and non-metals. GOST 9.005-72

(2019) Steel and alloys: Methods for detection and determination of grain size. DSTU 8972:2019

Carmona-Hernandez, A., Orozco-Cruz, R., Mejía-Sanchez, E., Espinoza-Vazquez, A., Contreras-Cuevas, A., Galvan-Martinez, R. (2021) Study of SCC of X70 steel Immersed in simulated soil solution at different pH by EIS.Materials, 14(23): 7445-7445

https://doi.org/10.3390/ma14237445

Cui, Z., Liu, Z., Wang, L., Li, X., Du, C., Wang, X. (2016) Effect of plastic deformation on the electrochemical and stress corrosion cracking behavior of X70 steel in near-neutral pH environment.Materials Science and Engineering: A, 677: 259-273

https://doi.org/10.1016/j.msea.2016.09.033

Desena, R.A., Bastos, І.N., Mendes, G.P. (2012) Theoretical and experimental aspects of the corrosivity of simulated soil solutions.International Scholarly Research Notices, ID 103715; p. 6

https://doi.org/10.5402/2012/103715

Egbewande, A., Chen, W., Eadie, R., Kania, R., van Boven, G., Worthingham, R., Been, J. (2014) Transgranular crack growth in the pipeline steels exposed to near-neutral pH soil aqueous solutions: Discontinuous crack growth mechanism.Corrosion Science, 83: 343-354

https://doi.org/10.1016/j.corsci.2014.02.032

Jia, Y.Z., Wang, J.Q., Han, E.H., Ke, W. (2011) Stress corrosion cracking of X80 pipeline steel in near-neutral pH environment under constant load tests with and without preload.Journal of Materials Science & Technology, 27(11): 1039-1046

https://doi.org/10.1016/S1005-0302(11)60184-9

Kim, B.A., Zheng, W., Williams, G., Laronde, M., Gianetto, J.A., Shen, G., Hosokawa, Y. (2004) Experimental study on SCC susceptibility of X60 steel using full pipe sections in near-neutral pH environment. in: International Pipeline Conference, 41766: 133-141

https://doi.org/10.1115/IPC2004-0280

Li, Z., Sun, B., Liu, Q., Yu, Y., Liu, Z. (2021) Fundamentally understanding the effect of non-stable cathodic potential on stress corrosion cracking of pipeline steel in near-neutral pH solution.Construction and Building Materials, 288: 123117-123117

https://doi.org/10.1016/j.conbuildmat.2021.123117

Liang, P., Du, C.W., Li, X.G., Chen, X., Liang, Z. (2009) Effect of hydrogen on the stress corrosion cracking behavior of X80 pipeline steel in Ku'erle soil simulated solution.International Journal of Minerals, Metallurgy and Materials, 16(4): 407-413

https://doi.org/10.1016/S1674-4799(09)60072-8

Liu, Z.Y., Du, C.W., Li, C., Wang, F.M., Li, X.G. (2013) Stress corrosion cracking of welded API X70 pipeline steel in simulated underground water.Journal of Materials Engineering and Performance, 22(9): 2550-2556

https://doi.org/10.1007/s11665-013-0575-2

Liu, Z.Y., Li, X.G., Cheng, Y.F. (2012) Mechanistic aspect of near-neutral pH stress corrosion cracking of pipelines under cathodic polarization.Corrosion Science, 55: 54-60

https://doi.org/10.1016/j.corsci.2011.10.002

Lu, B., Luo, J.L., Ivey, D.G. (2010) Near-neutral pH stress corrosion cracking susceptibility of plastically prestrained X70 steel weldment.Metallurgical and Materials Transactions A, 41(10): 2538-2547

https://doi.org/10.1007/s11661-010-0283-6

Luo, J., Luo, S., Li, L., Zhang, L., Wu, G., Zhu, L. (2019) Stress corrosion cracking behavior of X90 pipeline steel and its weld joint at different applied potentials in near-neutral solutions.Natural Gas Industry B, 6(2): 138-144

https://doi.org/10.1016/j.ngib.2018.08.002

Nyrkova, L. (2020) Stress-corrosion cracking of pipe steel under complex influence of factors.Engineering Failure Analysis, 116: 104757-104757

https://doi.org/10.1016/j.engfailanal.2020.104757

Nyrkova, L.I., Rybakov, A.O., Osadchuk, S.O., Melnichuk, S.L., Hapula, N.O. (2014) Device for investigation of sensibility of pipe steels to stress-corrosion cracking. Patent for invention, No 107229

Nyrkova, L.I., Lisovy, P.E., Goncharenko, L.V., Osadchuk, S.O., Kostin, V.A., Klymenko, A.V. (2021) Regularities of stress-corrosion cracking of pipe steel 09G2S at cathodic polarization in a model soil environment.Physics and Chemistry of Solid State, 22(4): 828-836

https://doi.org/10.15330/pcss.22.4.828-836

Nyrkova, L.I., Prokopchuk, S.M., Goncharenko, L.V., Osadchuk, S.O. (2021) Corrosion and mechanical behavior of 17G1S-U pipeline steel and its weld joint of in the terms simulating operational conditions.Journal of Physics: Conference Series, 2045(1): 012022-012022

https://doi.org/10.1088/1742-6596/2045/1/012022

Nyrkova, L.I., Lisovoy, P.E., Goncharenko, L.V., Osadchuk, S.O., Klimenko, A.V., Borisenko, Y.V., Batochkin, O.V. (2021) Regularities of stress corrosion cracking of 10G2FB pipeline steel in near neutral soil environment at cathodic polarization.Technologies and Engineering, 2: 29-39

https://doi.org/10.30857/2786-5371.2021.2.3

Nyrkova, L.І., Osadchuk, S.O., Rybakov, A.O., Mel'nychuk, S.L. (2020) Methodical approach and a criterion for the evaluation of the susceptibility of pipe steel to corrosion cracking.Materials Science, 55(5): 625-632

https://doi.org/10.1007/s11003-020-00352-x

Polyakov, S.G., Rybakov, A.A. (2009) The main mechanisms of stress corrosion cracking in natural gas trunk lines.Strength of Materials, 41(5): 456-463

https://doi.org/10.1007/s11223-009-9164-x

Shimamura, J., Izumi, D., Igi, S., Ishikawa, N., Ueoka, S., Ihara, K., Kondo, J. (2020) Material design for grade X65 UOE sour linepipe steels with SSC-resistant property.International Journal of Offshore and Polar Engineering, 30(4): 487-492

https://doi.org/10.17736/ijope.2020.hj38

Song, F.M. (2009) Predicting the mechanisms and crack growth rates of pipelines undergoing stress corrosion cracking at high pH.Corrosion Science, 51(11): 2657-2674

https://doi.org/10.1016/j.corsci.2009.06.051

Sun, Q.L., Cao, B., Wu, Y.S. (2008) Stress corrosion cracking of weld joint of pipeline steel X70 in near-neutral solution.Transactions of Materials and Heat Treatment, 39(3): 125-129

Sun, Q.L., Shao, W.W., Wang, X.G., Wang, C.B. (2013) Influence of fluctuation frequency on stress corrosion cracking of X70 pipeline steel welding joint.Advanced Materials Research, 690-693: 2668-2672

https://doi.org/10.4028/www.scientific.net/AMR.690-693.2668

Wan, H., Song, D., Liu, Z., Du, C., Zeng, Z., Wang, Z., Ding, D., Li, X. (2017) Effect of negative half-wave alternating current on stress corrosion cracking behavior and mechanism of X80 pipeline steel in near-neutral solution.Construction and Building Materials, 154: 580-589

https://doi.org/10.1016/j.conbuildmat.2017.07.076

Wan, H., Song, D., Liu, Z., Du, C., Zeng, Z., Yang, X., Li, X. (2017) Effect of alternating current on stress corrosion cracking behavior and mechanism of X80 pipeline steel in near-neutral solution.Journal of Natural Gas Science and Engineering, 38: 458-465

https://doi.org/10.1016/j.jngse.2017.01.008

Wang, J.Q., Atrens, A. (2003) SCC initiation for X65 pipeline steel in the 'high' pH carbonate/bicarbonate solution.Corrosion Science, 45(10): 2199-2217

https://doi.org/10.1016/S0010-938X(03)00044-1

Yuan, H., Liu, Z., Li, X., Du, C. (2017) Influence of applied potential on the stress corrosion behavior of X90 pipeline steel and its weld joint in simulated solution of near neutral soil environment.Jinshu Xuebao / Acta Metallurgica Sinica, 53(7): 797-807

Zheng, W., Sutherby, R., Revie, R.W., Tyson, W.R., Shen, G. (2000) Stress corrosion cracking of Linepipe steels in near-neutral ph environment: A review of the effects of stress. ASTM International

https://doi.org/10.1520/STP10238S

Zhiyong, L., Zhongyu, C., Xiaogang, L., Cuiwei, D., Yunying, X. (2014) Mechanistic aspect of stress corrosion cracking of X80 pipeline steel under non-stable cathodic polarization.Electrochemistry Communications, 48: 127-129

https://doi.org/10.1016/j.elecom.2014.08.016