In the present work, the susceptibility of API 5L X52 steel to corrosion processes was evaluated in the presence of high contents of hydrogen sulfide and carbon dioxide. Gravimetric tests and surface analyses were carried out to establish both the corrosion rate and damage type exhibited by the metal. The obtained results indicate that the hydrogen sulfide is the most active gas in the corrosion processes that took place, quite above carbon dioxide. The main observed corrosion products were iron sulfides and the typical damage associated with hydrogen sulfide presence was Sulfide Stress Cracking (SSC). The surface damage evidences the presence of cracks with considerable magnitude and metal loss as consequences of the corrosion processes. Likewise, the presence of oxygen in the system modifies the displayed corrosion type, where corrosion products such as iron oxides and reduction in the number and extent of cracks are observed. On the other hand, the addition of a film-forming corrosion inhibitor based on modified imidazolines eliminates completely the development of cracks, although under certain test conditions, it can favor localized pitting corrosion.
Duan, Y., Yu, F., Zhao, D., Cui, X. and Cui, Z. (2013) The Inhibition Performance of a New Imidazoline Derivative for Mild Steel in an Oil and Gas Field. Petroleum Science and Technology, 31, 1959-1966. http://dx.doi.org/10.1080/10916466.2011.553653
Gregg, M.R. and Ramachandran, S. (1999) Review of Corrosion Inhibitor Developments and Testing for Offshore Oil and Gas Production Systems. Corrosion Conference and Expo (CORROSION 2004), New Orleans, 28 March-1 April 2004, Paper 04422.
Jovancicevic, V., Ramachandran, S. and Prince, P. (1999) Inhibition of Carbon Dioxide Corrosion of Mild Steel by Imidazolines and Their Precursors. Corrosion, 55, 449-455. http://dx.doi.org/10.5006/1.3284006
Svenningsen, G., Palencsár, A. and Kvarekval, J. (2009) Investigation of Iron Sulfide Surface Layer Growth in Aqueous H2S/CO2 Environments. Corrosion Conference and Expo (CORROSION 2009): A Hit in the Heart of the South, Atlanta, 22-26 March 2009, Paper 09359.
Maa, H., Cheng, X., Li, G., Chen, S., Quan, Z., Zhao, S. and Niu, L. (2000) The Influence of Hydrogen Sulfide on Corrosion of Iron under Different Conditions. Corrosion Science, 42, 1669-1683. http://dx.doi.org/10.1016/S0010-938X(00)00003-2
Liu, M., Wang, J. and Ke, W. (2013) Corrosion Behavior of X52 Pipeline Steel in High H2S Concentration Solutions at Temperatures Ranging from 25°C to 140°C. Corrosion Engineering, Science and Technology, 48, 380-387. http://dx.doi.org/10.1179/1743278213Y.0000000095
Zhou, C., Chen, X., Wang, Z., Zheng, S., Li, X. and Zhang, L. (2014) Effects of Environmental Conditions on Hydrogen Permeation of X52 Pipeline Steel Exposed to High H2S-Containing Solutions. Corrosion Science, 89, 30-37. http://dx.doi.org/10.1016/j.corsci.2014.07.061
Gencheva, G., Coxa, K., Trana, H., Sarfraza, A., Bosch, C., Spiegel, M. and Erbe, A. (2015) Metallic, Oxygen-Containing Reaction Products after Polarization of Iron in H2S Saturated Saline Solutions. Corrosion Science, 98, 725-736. http://dx.doi.org/10.1016/j.corsci.2015.06.017
Shi, F., Zhang, L., Yang, J., Lu, M., Ding, J. and Lia, H. (2016) Polymorphous FeS Corrosion Products of Pipeline Steel under Highly Sour Conditions. Corrosion Science, 102, 103-113. http://dx.doi.org/10.1016/j.corsci.2015.09.024
Tang, J., Shao, Y., Guo, J., Zhang, T., Meng, G. and Wang, F. (2010) The Effect of H2S Concentration on the Corrosion Behavior of Carbon Steel at 90°C. Corrosion Science, 52, 2050-2058. http://dx.doi.org/10.1016/j.corsci.2010.02.004
Ningn, J., Zheng, Y., Brown, B., Young, D. and Nesic, S. (2015) Construction and Verification of Pourbaix Diagrams for Hydrogen Sulfide Corrosion of Mild Steel. NACE International, Corrosion 2015 Conference and Expo, Paper No. 5507.
Nesic, S., Zheng, Y., Brown, B. and Ning, J. (2016) Advancement in Predictive Modeling of Mild Steel Corrosion in CO2 and H2S Containing Environments. CORROSION, 72, 679-691. http://dx.doi.org/10.5006/1667
Shoesmith, D.W., Taylor, P., Bailey, M.G. and Owen, D.G. (1980) The Formation of Ferrous Monosulfide Polymorphs during the Corrosion of Iron by Aqueous Hydrogen Sulfide at 21°C. Journal Electrochemical Society, 125, 1007-1015. http://dx.doi.org/10.1149/1.2129808
Rickard, D. and Luther, G.W. (1997) Kinetics of Pyrite Formation by the H2S Oxidation of Iron (II) Monosulfide in Aqueous Solutions between 25 and 125°C, the Mechanism. Geochimica et Cosmochimica Acta, 61, 135-147. http://dx.doi.org/10.1016/S0016-7037(96)00322-5
Zheng, Y., Ning, J., Brown, B., Young, D. and Nesic, S. (2015) Mechanistic Study of the Effect of Iron Sulfide Layers on Hydrogen Sulfide Corrosion of Carbon Steel. Corrosion Conference and Expo (CORROSION 2015), Dallas, 15-19 March 2015, Paper 5933.
Serna, S. and Albarrán, J.L. (2003) Effect of Wet Hydrogen Sulfide Environments on the Cracking Susceptibility of Medium Strength Microalloyed Pipeline Steels for Oil and Gas Transport. Corrosion Conference and Expo (CORROSION 2015), Dallas, 16-20 March 2015, Paper 03530.
Mendibile, C. and Sourmail, T. (2009) Composition Optimization of High-Strength Steels for Sulfide Stress Cracking Resistance Improvement. Corrosion Science, 51, 2878-2884. http://dx.doi.org/10.1016/j.corsci.2009.08.013
Kittel, J., Smanio, V., Fregonese, M., Garnier, L. and Lefebvre, X. (2010) Hydrogen Induced Cracking (HIC) Testing of Low Alloy Steel in Sour Environment: Impact of Time of Exposure on the Extent Of Damage. Corrosion Science, 52, 1386-1392. http://dx.doi.org/10.1016/j.corsci.2009.11.044
Chen, H.J., Hong, T. and Paul Jepson, W. (2000) High Temperature Corrosion Inhibition Performance of Imidazoline and Amide. Corrosion Conference and Expo (CORROSION 2000), Orlando, March 2000, Paper 00035.
Zhao, J., Duan, H. and Jiang, R. (2015) Synergistic Corrosion Inhibition Effect of Quinoline Quaternary Ammonium Salt and Gemini Surfactant in H2S and CO2 Saturated Brine Solution. Corrosion Science, 91, 108-119. http://dx.doi.org/10.1016/j.corsci.2014.11.007