Pore resistance limitations from EIS data for the evaluation of organic DTM coatings based on a self-crosslinking acrylic resin
Keywords:
Water based acrylic resin, self-crosslinking polymer, EIS (Electrochemical Impedance Spectroscopy), pore resistance (Rpo), equivalent circuit, saline chamber, saline-acid chamber, blistering, corrosion, DTM (Direct to Metal)
Abstract
Self-crosslinking Water-based acrylic resins are currently widely used in the formulation of paints for the protection of materials exposed to atmospheric corrosion. These resins, given their "self-crosslinking" designation, initiate their crosslinking process once they are applied on a previously prepared surface. It is expected that with time they will increase their protection, due to their continuing self-crosslinking mechanism.
In this work, metallic plates coated with these resins were evaluated under simulated salt neutral spray (ASTM B117). The coating degradation processes were monitored by Electrochemical Impedance Spectroscopy (EIS) and visual inspection, according to ASTM D610 and ASTM D714, aiming to identify and quantify the appearance of blistering and corrosion products. The results revealed rapid drops in pore resistance (Rpo) for systems exposed to neutral salt spray (NSS), saline-acidic or acidified conditions, which coincided with the formation of blisters. On the contrary, the systems in the wet chamber showed an increase in the Rpo, which evidences from an electrical point of view a greater opposition to the passage of current. Notwithstanding, still the appearance of blisters on the coated surfaces was observed.
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References
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[23] V.S. Raja, R. Gayathiri Devi, A. Venugopal, N.C. Debnath, J. Giridhar, Evaluation of blistering performance of pigmented and unpigmented alkyd coatings using electrochemical impedance spectroscopy.http://dspace.library.iitb.ac.in/xmlui/bitstream/handle/10054/1261/14raja444230.pdf?sequence=1. DOI: https://doi.org/10.1016/S0257-8972(98)00504-0
[24] Jianyang Li, Hongwei Shi, Fuchun Liu, En-Hou Han, Self-healing epoxy coating based on tung oil-containing microcapsules for corrosion protection, Progress in Organic Coatings, 156 (2021). DOI: https://doi.org/10.1016 / j.porgcoat.2021.106236
[2] J.M. Hu, J.Q. Zhang, C.N. Cao, Determination of water uptake and diffusion of Cl- ion in epoxy primer on aluminum alloys in NaCl solutions by electrochemical impedance spectroscopy, Prog in Organic Coatings 46 (2003), Pag 273-279. DOI: https://doi.org/10.1016 / S0300-9440 (03) 00010-9
[3] S.Duval, M.Keddam, M. Sfaira, A. Srhiri, H. Takenouti, Electrochemical impedance spectroscopy of epoxy-vinyl coating in aqueous medium analized by dipolar relaxation of polimer, J. Electrochem. Soc., 149 (2002), BS20-9. DOI: https://doi.org/10.1149/1.1512667
[4] H. Leidheiser Jr, Electrical and electrochemical measurements as predictors of corrosion at the metal organic coating interface, Prog. Organic Coat. 7 (1979), pag 79 – 104. DOI: https://doi.org/10.1016/0300-9440(79)80038-7
[5] J. Kittel, N. Celati, M. Keddam, H. Takenouti, Influence of the coating-substrate interactions on the corrosion protection: characterization by impedance spectroscopy of the inner and outer parts of a coating, Prog. Orgaic Coat., 46(200#), Pag 135-147. DOI: https://doi.org/10.1016/S0300-9440(02)00221-7
[6] I.C.P. Margarit-Mattos, EIS and organic coatings performance: Revisiting some key points, Electrochimica Acta, 354 (2020). DOI: https://doi.org/10.1016/j.electacta.2020.136725
[7] L.F. Vesga, E. Vera, J.H. Panqueva, Use of the electrochemical impedance spectroscopy to evaluate the performance of a primer applied under different surface preparation methods, Progress in Organic Coating 39 (2000) Pag 61-65. DOI: https://doi.org/10.1016/S0300-9440(00)00100-4
[8] I.D. Raistrck, J.R. MacDonald, D.R. Franceschetti, The electrical analogs of physical and chemical process, J.R. MacDonnald (ED), Impedance Spectroscopy, John Wiley & Sons, New York (2003), Pag 27 -132.
[9] F. Mansfeld, H. Shih, H. Greene, C.M. Tsai, Analysis of EIS data for common corrosion process., J. Scully, D.C. Silverman, M. Kending (Eds), Electrochemical Impedance: Analysis and interpretation, ASTM STP 1188, ASTM, Philadelphia, PA (1993), Psg 37. DOI: https://doi.org/10.1520/STP18062S
[10] B. Normand, H. Takenouti, M. Keddam, H. Liao, G. Monteil, C. Coddet, Electrochemical impedance spectroscopy and dielectric properties of polymer: application to PEEK thermally sprayed coating, Electrochim Acta 49 (2004), Pag 2981-2986. Doi: https://doi.org/10.1016/j.electacta.2004.01.057
[11] J. Vogelsang, G. Strum, New interpretation of electrochemical data obtained from organic barrier coatings, Electrochim. Acta 46 (2001) Pg 3817-3826. DOI: https://doi.org/10.1016/S0013-4686(01)00668-5
[12] J.R. Scully, Electrochemical impedance spectroscopy of organic-coated steel: correlation of impedance parameters with long-term coating deterioration, J. Electrochem. Soc., 136(4)(1989), Pag 979-990.
[13] G. Bierwagen, D. Tallman, J. Li, L. He, EIS studies of coated metals in accelerated exposure, Prog. Organic Coat., 46(2003), Pag 148-157. DOI: https://doi.org/10.1016 / S0300-9440 (02) 00222-9
[14] G.P. Bierwagen, J. Li, L.He, L. Ellingson, D.E. Tallman, Studies of a new accelerated evaluation method for coating corrosion resistance-thermal cycling testing, Prog. Organic Coat., 39(2000), pag 67-78. DOI: https://doi.org/10.1016/S0300-9440(00)00106-5
[15] C.G. Munger, Corrosion prevention by protective coatings, NACE international, 1999, Pag 335-340.
[16] Aman Pathania, Raj Kumar Arya, Sanjeev Ahuja, Crosslinked polymeric coatings: Preparation, characterization, and diffusion studies, Progress in Organic Coatings, 105 (2017) Pages 149-162. DOI: https://doi.org/10.1016/j.porgcoat.2016.12.023
[17] Husain, J. Chakkamalayath, S.Al-Bahar, Electrochemical impedance spectroscopy as a rapid technique for evaluating the failure of fusion bonded epoxy powder coating, Engineering Failure Analysis, 82 (2017) Pages 765-775. DOI: https://doi.org/10.1016/ j.engfailanal.2017.06.041
[18] Harleen Kaur, Jyoti Sharma, Divyansh Jindal, Raj Kumar Arya, Sanjeev Kumar Ahuja, Shashi Bhushan Arya, Crosslinked polymer doped binary coatings for corrosion protection, Progress in Organic Coatings, 125 (2018) Pages 32-39. DOI: https://doi.org/10.1016/j.porgcoat.2018.08.026
[19] Dongdong Song, Hongxia Wan, Xiaohui Tu, Wei Li, A better understanding of failure process of waterborne coating/metal interface evaluated by electrochemical impedance spectroscopy, Progress in Organic Coatings, 142 (2020). DOI: https://doi.org/10.1016/ j.porgcoat.2020.105558
[20] M.W. Kending, S. Jeanjaquet, J. Lumsden, Electrochemical Impedance of Coated Metal Undergoing Loss of Adhesion, Pag 407. Electrochemical Impedance Analysis and Interpretation STP 1188 ASTM. DOI: https://doi.org/10.1520/STP18082S
[21] E.D. Schachinger, R. Braidt, B. StrauB, A.W. Hassel. EIS study of blister formation on coated galvanised steel in oxidizing alkaline solutions, Corrosion Science, Vol 96 (2015), Pag 6-13. DOI: https://doi.org/10.1016 / j.corsci.2014.12.010
[22] Z. Chen, C. He, F. Yu, Y. Wang, “Study and Application of Electrochemical Impedance Spectroscopy for Quickly Evaluating the Performance of Coatings and Predicting the Failure Time in the Development of Waterborne Epoxy Micaceous Iron Oxide Coatings”, Int. J. Electrochem. Sci., 12 (2017) 2798 – 2812. DOI: https://doi.org/10.20964/2017.04.64
[23] V.S. Raja, R. Gayathiri Devi, A. Venugopal, N.C. Debnath, J. Giridhar, Evaluation of blistering performance of pigmented and unpigmented alkyd coatings using electrochemical impedance spectroscopy.http://dspace.library.iitb.ac.in/xmlui/bitstream/handle/10054/1261/14raja444230.pdf?sequence=1. DOI: https://doi.org/10.1016/S0257-8972(98)00504-0
[24] Jianyang Li, Hongwei Shi, Fuchun Liu, En-Hou Han, Self-healing epoxy coating based on tung oil-containing microcapsules for corrosion protection, Progress in Organic Coatings, 156 (2021). DOI: https://doi.org/10.1016 / j.porgcoat.2021.106236
Published
2022-01-01
How to Cite
Vanegas, M., Medina, J., Vesga, L., & Bejarano, W. (2022). Pore resistance limitations from EIS data for the evaluation of organic DTM coatings based on a self-crosslinking acrylic resin. ITECKNE, 19(1), 5-14. https://doi.org/https://doi.org/10.15332/iteckne.v19i1.2626
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Research and Innovation Articles
