Electrochemical Deposition of Polyaniline on Carbon Steel for Corrosion Study in Geothermal Solution

Abstract:

Polyaniline has been widely developed for many applications, e.g. sensor, supercapacitor components, electrochromic devices, and anticorrosion pigments. Although the addition of polyaniline pigment in organic coatings has been an alternative for corrosion protection in industrial applications, the protection mechanism is still not fully understood. Herein in this study, as a part of the development of polyaniline/silicon dioxide coating for geothermal application, polyaniline has been deposited electrochemically on carbon steel surface in oxalic acid medium and tested in geothermal solution to understand the contribution of polyaniline to the corrosion protection of a polyaniline-based composite in the geothermal system. To observe the surface/interface reaction between the electrolyte and electrode surface during the electrochemical polymerization, electrochemical impedance spectroscopy (EIS) was applied after each cycle. For corrosion study in the geothermal application, an artificial geothermal solution was used with the composition of 1,500 mg/l Cl^-, 20 mg/l SO₄^2-, 15 mg/l HCO₃^-, 200 mg/l Ca²⁺, 250 mg/l K⁺, and 600 mg/l Na⁺, and pH 4 to simulate a geothermal brine found in Sibayak, Indonesia. An electrochemical measurement was performed by monitoring the open circuit potential over seven days, with the interruption by EIS every 22 hours. The experiments were performed at room temperature and 150 °C (1 MPa) in an oxygen-free environment. Impedance spectra showed a reduction of the total impedance value of approximately 10 times for specimens measured at 150 °C compared to the specimens measured at room temperature, suggesting a less stable layer at high temperature.

• Periodical: Materials Science Forum (Volume 966)
• Pages: 107-115
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.966.107
• Online since: August 2019
• Authors: Gabriela Aristia*, Le Quynh Hoa, Ralph Baessler
• Keywords: Corrosion, Electrochemical Deposition, Polyaniline

References

[1] I. Stober, K. Bucher, Geothermal Energy: From Theoretical Models to Exploration and Development, Springer Science & Business Media, (2013).

[2] P.F. Ellis, II, M.F. Conover, Materials selection guidelines for geothermal energy utilization systems, NASA STI/Recon Technical Report N 81 (1981).

DOI: 10.2172/6664808

[3] H.S. Klapper, R. Bäßler, J. Sobetzki, K. Weidauer, D. Stürzbecher, Corrosion resistance of different steel grades in the geothermal fluid of Molasse Basin, Materials and Corrosion 64 (2013) 764-771.

DOI: 10.1002/maco.201106430

[4] M.P. Hochstein, Classification and assessment of geothermal resources, Small geothermal resources: A guide to development and utilization, UNITAR, New York (1990) 31-57.

[5] R. Bäßler, A. Keserović, J. Sobetzki, H.S. Klapper, M. Dimper, Materials evaluation for geothermal applications in different geothermal waters, World Geothermal Congress 2015, (2015).

DOI: 10.11113/jt.v75.5164

[6] R.W. Revie, Uhlig's Corrosion Handbook, Wiley, (2005).

[7] C.G. Munger, L.D. Vincent, Corrosion Prevention by Protective Coatings, National Association of Corrosion Engineers, (1999).

[8] K. Belas-Dacillo, A.C. de Leon, A.C.R. Panopio, R.C. Advincula, Evaluating protective coatings and metal alloys in acidic geothermal fluids using laboratory techniques, World Geothermal Congress, (2015).

[9] A.J. Dominis, G.M. Spinks, G.G. Wallace, Comparison of polyaniline primers prepared with different dopants for corrosion protection of steel, Progress in Organic Coatings 48 (2003) 43-49.

DOI: 10.1016/s0300-9440(03)00111-5

[10] G.M. Spinks, A.J. Dominis, G.G. Wallace, D.E. Tallman, Electroactive conducting polymers for corrosion control, J Solid State Electrochem 6 (2002) 85-100.

DOI: 10.1007/s100080100211

[11] A. Keserović, R. Bäßler, Geothermal systems of Indonesia - influence of different factors on the corrosion performance of carbon steel API Q125, World Geothermal Congress, (2015).

[12] J.P. Atmojo, R. Itoi, T. Tanaka, M. Fukuda, S. Sudarman, A. Widiyarso, Modeling studies of Sibayak geothermal reservoir, Northern Sumatra, Indonesia, 2000, pp.2037-2042.

[13] G.G. Wallace, P.R. Teasdale, G.M. Spinks, L.A.P. Kane-Maguire, Conductive Electroactive Polymers: Intelligent Polymer Systems, Third Edition, CRC Press, (2008).

DOI: 10.1201/9781420067156

[14] D. Sazou, C. Georgolios, Formation of conducting polyaniline coatings on iron surfaces by electropolymerization of aniline in aqueous solutions, Journal of Electroanalytical Chemistry 429 (1997) 81-93.

DOI: 10.1016/s0022-0728(96)05019-x

[15] U. Rammelt, P.T. Nguyen, W. Plieth, Corrosion protection by ultrathin films of conducting polymers, Electrochimica Acta 48 (2003) 1257-1262.

DOI: 10.1016/s0013-4686(02)00833-2

[16] A. Nautiyal, S. Parida, Comparison of polyaniline electrodeposition on carbon steel from oxalic acid and salicylate medium, Progress in Organic Coatings 94 (2016) 28-33.

DOI: 10.1016/j.porgcoat.2016.01.014

[17] J. Stejskal, P. Kratochvíl, A.D. Jenkins, The formation of polyaniline and the nature of its structures, Polymer 37 (1996) 367-369.

DOI: 10.1016/0032-3861(96)81113-x

[18] G. Mengoli, M.M. Musiani, Protective coatings on iron by anodic oxidation of phenols in oxalic acid medium, Electrochimica Acta 31 (1986) 201-210.

DOI: 10.1016/0013-4686(86)87109-2

[19] M.E. Orazem, B. Tribollet, Diffusion Impedance, Electrochemical Impedance Spectroscopy, John Wiley & Sons, Inc., (2008).

[20] G. Baril, G. Galicia, C. Deslouis, N. Pébère, B. Tribollet, V. Vivier, An impedance investigation of the mechanism of pure magnesium corrosion in sodium sulfate solutions, J. Electrochem. Soc. 154 (2007) C108-C113.

DOI: 10.1149/1.2401056

[21] M.E. Orazem, B. Tribollet, Equivalent Circuit Analogs, Electrochemical Impedance Spectroscopy, John Wiley & Sons, Inc., (2008).