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Corrosion beneath a blister with high impedance

  • Vinod UpadhyayEmail author
  • Luke Wiering
  • Zachary Bergseth
  • Xiaoning Qi
  • Dante Battocchi
Article
  • 3 Downloads

Abstract

In this work, the effect of blisters on the performance of protective coatings was investigated. Artificial blisters were generated by potentiostatic DC polarization of an epoxy-coated aluminum substrate and characterized using optical microscopy, electron microscopy (SEM), scanning electrochemical microscopy, as well as by scanning Kelvin probe (SKP) measurement. Impedance measured above blisters displayed high values, typical of an intact undamaged coating. SKP measurement above the blister identified regions of likely corrosion beneath it, which was verified by SEM. SEM images showed pitting-like corrosion beneath the blisters, implying that high impedance measured on delaminated coatings may correspond to the delaminated polymeric film. SKP was also able to identify regions of invisible delamination.

Keywords

Coating Corrosion Blister Electrochemical impedance spectroscopy Delamination Scanning Kelvin probe Scanning electrochemical microscopy Epoxy 

Notes

References

  1. 1.
    Koch, GH, Brongers, MPH, Thompson, NG, Virmani, YP, Payer, JH. “Corrosion Costs and Preventive Strategies in the United States.” Report by CC Technologies Laboratories, Inc. to Federal Highway Administration (FHWA), Office of Infrastructure Research and Development, Report FHWA-RD-01-156 (2001)Google Scholar
  2. 2.
    Tedim, J, Poznyak, SK, Kuznetsova, A, Raps, D, Hack, T, Zheludkevich, ML, Ferreira, MGS, “Enhancement of Active Corrosion Protection via Combination of Inhibitor-Loaded Nanocontainers.” ACS Appl. Mater. Interfaces, 2 1528–1535 (2010).  https://doi.org/10.1021/am100174t CrossRefGoogle Scholar
  3. 3.
    Lamaka, SV, Zheludkevich, ML, Yasakau, KA, Montemor, MF, Ferreira, MGS, “High Effective Organic Corrosion Inhibitors for 2024 Aluminium Alloy.” Electrochim. Acta, 52 7231–7247 (2007).  https://doi.org/10.1016/j.electacta.2007.05.058 CrossRefGoogle Scholar
  4. 4.
    Montemor, MF, Snihirova, DV, Taryba, MG, Lamaka, SV, Kartsonakis, IA, Balaskas, AC, Kordas, GC, Tedim, J, Kuznetsova, A, Zheludkevich, ML, Ferreira, MGS, “Evaluation of Self-Healing Ability in Protective Coatings Modified with Combinations of Layered Double Hydroxides and Cerium Molibdate Nanocontainers Filled with Corrosion Inhibitors.” Electrochim. Acta, 60 31–40 (2012)CrossRefGoogle Scholar
  5. 5.
    Twite, RL, Bierwagen, GP, “Review of Alternatives to Chromate for Corrosion Protection of Aluminum Aerospace Alloys.” Prog. Org. Coat., 33 91–100 (1998).  https://doi.org/10.1016/S0300-9440(98)00015-0 CrossRefGoogle Scholar
  6. 6.
    Snihirova, D, Lamaka, SV, Taryba, M, Salak, AN, Kallip, S, Zheludkevich, ML, Ferreira, MGS, Montemor, MF, “Hydroxyapatite Microparticles as Feedback-Active Reservoirs of Corrosion Inhibitors.” ACS Appl. Mater. Interfaces, 2 3011–3022 (2010).  https://doi.org/10.1021/am1005942 CrossRefGoogle Scholar
  7. 7.
    Allahar, KN, Bierwagen, GP, Gelling, VJ, “Understanding AC–DC–AC Accelerated Test Results.” Corros. Sci., 52 1106–1114 (2010)CrossRefGoogle Scholar
  8. 8.
    Allahar, KN, Hurley, MF, Sapper, ED, Butt, DP, “Simulation of the Relaxation Potential Profile of an AC–DC–AC test.” Int. J. Corros., 2014 1–12 (2014)CrossRefGoogle Scholar
  9. 9.
    Bethencourt, M, Botana, FJ, Cano, MJ, Osuna, RM, Marcos, M, “Lifetime Prediction of Waterborne Acrylic Paints with the AC–DC–AC Method.” Prog. Org. Coat., 49 275–281 (2004)CrossRefGoogle Scholar
  10. 10.
    Bard, AJ, Fan, FF, Kwak, J, Lev, O, “Scanning Electrochemical Microscopy. Introduction and Principles.” Anal. Chem., 61 132–138 (1989)CrossRefGoogle Scholar
  11. 11.
    Kwak, J, Bard, AJ, “Scanning Electrochemical Microscopy. Theory of the Feedback Mode.” Anal. Chem., 61 1221–1227 (1989)CrossRefGoogle Scholar
  12. 12.
    Bard, AJ, Denuault, G, Lee, C, Mandler, D, Wipf, DO, “Scanning Electrochemical Microscopy: A New Technique for the Characterization and Modification of Surfaces.” Acc. Chem. Res., 23 357–363 (1990)CrossRefGoogle Scholar
  13. 13.
    González, S, Santana, JJ, González-García, Y, Fernández-Mérida, L, Souto, RM, “Scanning Electrochemical Microscopy for the Investigation of Localized Degradation Processes in Coated Metals: Effect of Oxygen.” Corros. Sci., 53 1910–1915 (2011)CrossRefGoogle Scholar
  14. 14.
    Bastos, AC, Simões, AM, González, S, González-García, Y, Souto, RM, “Imaging Concentration Profiles of Redox-Active Species in Open-Circuit Corrosion Processes with the Scanning Electrochemical Microscope.” Electrochem. Commun., 6 1212–1215 (2004)CrossRefGoogle Scholar
  15. 15.
    Simões, AM, Battocchi, D, Tallman, DE, Bierwagen, GP, “SVET and SECM Imaging of Cathodic Protection of Aluminium by a Mg-Rich Coating.” Corros. Sci., 49 3838–3849 (2007)CrossRefGoogle Scholar
  16. 16.
    Fu, AQ, Cheng, YF, “Characterization of Corrosion of X65 Pipeline Steel Under Disbonded Coating by Scanning Kelvin Probe.” Corros. Sci., 51 914–920 (2009)CrossRefGoogle Scholar
  17. 17.
    Stratmann, M, Streckel, H, Feser, R, “A New Technique Able to Measure Directly the Delamination of Organic Polymer Films.” Corros. Sci., 32 467–470 (1991)CrossRefGoogle Scholar
  18. 18.
    Stratmann, M, Streckel, H, “On the Atmospheric Corrosion of Metals Which are Covered with Thin Electrolyte Layers. Verification of the Experimental Technique.” Corros. Sci., 30 (1990) 681–696 (1990)CrossRefGoogle Scholar
  19. 19.
    Stratmann, M, Leng, A, Fürbeth, W, Streckel, H, Gehmecker, H, Große-Brinkhaus, KH, “The Scanning Kelvin Probe; a New Technique for the In Situ Analysis of the Delamination of Organic Coatings.” Prog. Org. Coat., 27 261–267 (1996)CrossRefGoogle Scholar
  20. 20.
    Wapner, K, Schoenberger, B, Stratmann, M, Grundmeier, G, “Height-Regulating Scanning Kelvin Probe for Simultaneous Measurement of Surface Topology and Electrode Potentials at Buried Polymer/Metal Interfaces.” J. Electrochem. Soc., 152 E114 (2005).  https://doi.org/10.1149/1.1856914 CrossRefGoogle Scholar
  21. 21.
    Stratmann, M, “The Investigation of the Corrosion Properties of Metals, Covered with Adsorbed Electrolyte Layers—A New Experimental Technique.” Corros. Sci., 27 869–872 (1987)CrossRefGoogle Scholar
  22. 22.
    Maier, B, Frankel, GS, “Behavior of Magnesium-Rich Primers on AA2024-T3.” Corrosion, 67 055001–1–055001–15 (2011).  https://doi.org/10.5006/1.3586018 CrossRefGoogle Scholar
  23. 23.
    Fürbeth, W, Stratmann, M, “The Delamination of Polymeric Coatings from Electrogalvanised Steel—A Mechanistic Approach. Part 3: Delamination Kinetics and Influence of CO2.” Corros. Sci., 43 243–254 (2001)CrossRefGoogle Scholar
  24. 24.
    Fürbeth, W, Stratmann, M, “The Delamination of Polymeric Coatings from Electrogalvanised Steel—A Mechanistic Approach. Part 1: Delamination from a Defect with Intact Zinc Layer.” Corros. Sci., 43 207–227 (2001)CrossRefGoogle Scholar
  25. 25.
    Fürbeth, W, Stratmann, M, “The Delamination of Polymeric Coatings from Electrogalvanized Steel—A Mechanistic Approach. Part 2: Delamination from a Defect Down to Steel.” Corros. Sci., 43 229–241 (2001)CrossRefGoogle Scholar
  26. 26.
    Bacon, RC, Smith, JJ, Rugg, FM, “Electrolytic Resistance in Evaluating Protective Merit of Coatings on Metals.” Ind. Eng. Chem., 40 161–167 (1948)CrossRefGoogle Scholar
  27. 27.
    Bierwagen, GP, He, L, Li, J, Ellingson, L, Tallman, DE, “Studies of a New Accelerated Evaluation Method for Coating Corrosion Resistance—Thermal Cycling Testing.” Prog. Org. Coat., 39 67–78 (2000)CrossRefGoogle Scholar
  28. 28.
    Souto, RM, Fernández-Mérida, L, González, S, “SECM Imaging of Interfacial Processes in Defective Organic Coatings Applied on Metallic Substrates Using Oxygen as Redox Mediator.” Electroanalysis, 21 2640–2646 (2009)CrossRefGoogle Scholar
  29. 29.
    Nazarov, A, Le Bozec, N, Thierry, D, Le Calvé, P, Pautasso, JP, “Scanning Kelvin Probe Investigation of Corrosion Under Thick Marine Paint Systems Applied on Carbon Steel.” Corrosion, 68 720–729 (2012).  https://doi.org/10.5006/0551 CrossRefGoogle Scholar

Copyright information

© American Coatings Association 2019

Authors and Affiliations

  1. 1.Coatings and Polymeric MaterialsNorth Dakota State UniversityFargoUSA

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