Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지
DOI QR코드

DOI QR Code

The study on the influence of surface cleanness and water soluble salt on corrosion protection of epoxy resin coated carbon steel

  • Shon, MinYoung (Department of Industrial Chemistry, Coating & Adhesion System Lab, Pukyong National University)
  • Received : 2014.07.29
  • Accepted : 2014.10.24
  • Published : 2014.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

The corrosion resistance of epoxy-coated carbon steel was evaluated. The carbon steel surface was subjected to different treatment methods such as steel grit blasting and power tool treatment as well as contamination of water soluble salt. To study the effect of the surface treatments and contamination, the topology of the treated surface was observed by confocal microscopy and a pull-off adhesion test was conducted. The corrosion resistance of the epoxy-coated carbon steel was further examined by electrochemical impedance spectroscopy (EIS) combined with immersion test of 3.5 wt% of NaCl solution. Consequently, the surface contamination by sodium chloride with $16mg/m^2$, $48mg/m^2$ and $96mg/m^2$ didn't affect the adhesion strength for current epoxy coated carbon steel and blister and rust were not observed on the surface of epoxy coating contaminated by various concentration of sodium chloride after 20 weeks of immersion in 3.5 wt% NaCl aqueous solutions. In addition, the results of EIS test showed that the epoxy-coated carbon steel treated with steel grit blasting and power tool showed similar corrosion protection performance and surface cleanness such as Sa 3 and Sa 2.5 didn't affect the corrosion protectiveness of epoxy coated carbon steel.

Keywords

References

  1. G. W. Critchlow, DM. Brewis Int. J. Adhes. Adhes., 15, 173 (1995). https://doi.org/10.1016/0143-7496(95)91628-J
  2. Y. Gilibert, G. Verchery, Infuence of surface roughness on mechanical properties of joints, New York: Plenum Press (1982).
  3. C. W. Jennings. Am Chem Soc Div, Org Chem, 31, 184 (1971).
  4. J. P. Sargent, Int. J. Adhes Adhes., 14, 21 (1994). https://doi.org/10.1016/0143-7496(94)90017-5
  5. T. R. Katona, S. C Batterman, Int. J. Adhes. Adhes., 3, 85 (1983). https://doi.org/10.1016/0143-7496(83)90022-2
  6. K Matsui, J. Adhesion., 10, 81 (1990).
  7. A. F. Harris, A. Beevers, Conf Proc Structural Adhesives in Engineering V. Bristol: Institute of Materials, (1998).
  8. Sancaktar, R. J. Gomatam, Adhesion Sci. Technol., 15, 97 (2001). https://doi.org/10.1163/156856101743346
  9. M. Shahid, S. A. Hashim, Int. J. Adhes. Adhes., 22, 235 (2002). https://doi.org/10.1016/S0143-7496(01)00059-8
  10. M. Morcillo, S. Feliu, J. C. Galvan, J. M. Bastidas, J. Oil. Col. Chem. Assoc., 71, 1 (1988).
  11. M. Morcillo, J. Simancas, J. Protect. Coat. Linings 14, 40 (1997).
  12. M. Morcillo, J. Simancas, Proceedings of the PCE'97, Paper no. 12, The Hague, March (1997).
  13. N. L. Thomas, J. Oil. Col. Chem. Assoc., 74, 83 (1991).
  14. D. G. Weldon, J. A. Caine, Proceedings of the SSPC Symposium, Pittsburgh, SSPC Report no. 85-106 (1985).
  15. J. West, Proceedings of the UK Corrosion'85, Harrogate, 4-6 November (1985).
  16. D. G. Weldon, A. Bochan, M. Schleiden, J. Protect. Coat. Linings 4, 46 (1987).
  17. K. A. Trimber, J. Protect. Coat. Linings, 5, 30 (1988).
  18. N. L. Thomas, J. Protect. Coat. Linings, 6, 63 (1989).
  19. A. Beach, The adverse effect of soluble salt contamination on the durability of subsequently applied paint systems, M.Sc. Thesis, UK (2002).
  20. ISO 8501: Preparation of steel substrates before application of paints and related products-Visual assessment of surface cleanliness (2001).
  21. ISO 20340: Paints and varnishes - Performance requirements for protective paint systems for offshore and related structures (2009).
  22. ASTM D4541: Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers (2009).
  23. D. Loveday, P. Peterson, and B. Rodgers, Evaluation of Organic Coatings with Electrochemical Impedance Spectroscopy Part 2: Application of EIS to Coatings, JCT Coatings Tech, October (2004).