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Article
2021

Improved Corrosion Resistance of AZ91D Mg Alloy by Cerium-Based Films. Formation of a Duplex Coating with Polypyrrole


A. P. LoperenaA. P. Loperena, I. L. LehrI. L. Lehr, S. B. SaidmanS. B. Saidman
Russian Journal of Electrochemistry
https://doi.org/10.1134/S1023193521010067
Abstract / Full Text

In order to improve the corrosion resistance of die-cast AZ91D magnesium alloy in simulated physiological solution, two cerium-based coatings were synthesized. The coatings were electrodeposited from solutions containing Ce(NO3)3, H2O2 and C6H8O7 or C4H4O6Na2. The influence of the presence of sodium tartrate and citric acid in the preparation solution on the morphology, composition and anticorrosive performance of the generated coatings was evaluated. The corrosion properties were examined in Ringer solution by polarization studies, open circuit measurements and faradaic impedance spectroscopy. Results showed that the incorporation of additives improves the anticorrosive properties of the films formed without sodium tartrate or citric acid. The coating formed in the presence of sodium tartrate showed the best anticorrosive performance. Subsequently, the possibility of forming duplex coatings employing the cerium-based films as inner layers and polypyrrole as top coating was evaluated. At this point, it was found that polypyrrole can be electropolymerized on top of the formed cerium-based film modified with sodium tartrate.

Author information
  • Instituto de Ingeniería Electroquímica y Corrosión (INIEC), Departamento de Ingeniería Química, Universidad Nacional del Sur (UNS), CONICET, Bahía Blanca, ArgentinaA. P. Loperena, I. L. Lehr & S. B. Saidman
References
  1. Sreekanth, D., Rameshbabu, N., and Venkateswarlu, K., Effect of K2TiF6 and Na2B407 as electrolyte additives on pore morphology and corosion properties of plasma electrolytic oxidation coatings on ZM21 magnesium alloy, Surf. Coat. Technol., 2013, vol. 222, p. 31.
  2. Li, L.Y., Cui, L.Y., and Zeng, R.C., Advances in functionalized polymer coatings on biodegradable magnesium alloys—a review, Acta Biomater., 2018, vol. 79, p. 23.
  3. Sreekanth, D. and Rameshbabu, N., Development and characterization of MgO/hydroxyapatite composite coating on AZ31 magnesium alloy by plasma electrolytic oxidation coupled with electrophoretic deposition, Mater. Lett., 2012, vol. 68, p. 439.
  4. Zheng, Y.F., Gu, X. N., and Witte, F., Biodegradable metals, Mater. Sci. Eng. R., 2014, vol. 77, p. 1.
  5. Hornberger, H., Virtanen, S., and Boccaccini, A.R., Biomedical coatings on magnesium alloys—a review, Acta Biomater., 2012, vol. 8, p. 2442.
  6. Fangfang, W., Zhang, W., and Zhang, T., Effect of variations of Al content on microstructure and corrosion resistance of PEO coatings on Mg–Al alloys, J. Alloys Compd., 2017, vol. 690, p. 195.
  7. Hariprasad, S., Ashfaq, M., and Arunnellaiappan, T., Role of electrolyte additives on in-vitro corrosion behavior of DC plasma electrolytic oxidaton coatings formed on Cp–Ti, Surf. Coat. Technol., 2016, vol. 292, p. 20.
  8. Yoganandan, G., Pradeep Premkumar, K., and Balaraju, J.N., Evaluation of corrosion resistance and self-healing behavior of zirconium-cerium conversion coating developed on AA2024 alloy, Surf. Coat. Technol., 2015, vol. 270, p. 249.
  9. Uma Rani, R., Shalini, V.M., and Thota, H.K., Comparison of corrosion performance of various conversion coatings on magnesium alloy using electrochemical techniques, J. Coat. Technol. Res., 2013, vol. 10, no. 5, p. 707.
  10. Sun, J. and Wang, G., Preparation and corrosion resistance of cerium conversion coatings on AZ91D magnesium alloy by cathodic electrochemical treatment, Surf. Coat. Technol., 2014, vol. 254, p. 42.
  11. Chen, Y., Xu, Z., and Smith, C., Recent advances on the development of magnesium alloys for biodegradable implants, Acta Biomater., 2014, vol. 10, p. 4561.
  12. Liu, C.-N., Wiesener, M., and Giner, I., Structure and corrosion resistance of cerium-oxide films on AZ31 as deposited by high-power ultrasound supported conversion chemistry, Front. Mater., 2015, vol. 2, p. 68.
  13. Castano, C., O’Keefe, M., and Fahrenholtz, W., Cerium-based oxide coatings, Curr. Opin. Solid State Mater. Sci., 2015, vol. 19, p. 69.
  14. Yang, Y., Yang, Y., and Du, X., Zhang, Influences of the main anodic electroplating parameters on cerium oxide films, Appl. Surf. Sci., 2014, vol. 305, p. 330.
  15. Pommiers, S., Fryret, J., and Castetbon, A., Alternative conversion coatings to chromate for the protection of magnesium alloys, Corros. Sci., 2014, vol. 84, p. 135.
  16. Loperena, A.P., Lehr, I.L., and Saidman, S.B., Formation of a cerium conversion coating on magnesium alloy using ascorbic acid as additive. Characterisation and anticorrosive properties of the formed film, J. Magnes. Alloy, 2016, vol. 4, p. 278.
  17. Pezzato, L., Brunelli, K., and Napolitani, E., Surface properties of AZ91 magnesium alloy using molybdate salts and low current densities, Appl. Surf. Sci., 2015, vol. 357, p. 1031.
  18. Tselesh, A.S., Anodic behaviour of tin in citrate solutions: The IR and XPS study on the composition of the passive layer, Thin Solid Films, 2008, vol. 516, p. 6253.
  19. Tizpar, A. and Ghasemi, Z., The corrosion inhibition and gas evolution studies of some surfactants and citric acid on lead alloy in 12.5 M H2SO4 solution, Appl. Surf. Sci., 2006, vol. 252, p. 8630.
  20. Wang, C., Zhu, S., and Jiang, F., Cerium conversion coatings for AZ91D magnesium alloy in ethanol solution and its corrosion resistance, Corros. Sci., 2009, vol. 51, p. 2916.
  21. Lehr, I.L. and Saidman, S.B., Corrosion protection of AZ91D magnesium alloy by a cerium–molybdenum coating—the effect of citric acid as an additive, J. Magnes. Alloys, 2018, vol. 6, p. 356.
  22. Loperena, A.P., Lehr, I.L., and Saidman, S.B., Cerium Oxide—Applications and Attributes, London: Intech Open, 2019, p. 23.
  23. Wang, X., Rong, J., and Yao, Y., Effect of microstructure on corrosion resistance of anodic oxidation coatings on TA2 commercially pure titanium in sodium-tartrate solution, Int. J. Electrochem. Sci., 2018, vol. 13, p. 9731.
  24. Shao, H.B., Wang, J.M., and Zhang, Z., The cooperative effect of calcium ions and tartrate ions on the corrosion inhibition of pure aluminum in an alkaline solution, Mater. Chem. Phys., 2002, vol. 77, p. 305.
  25. Hu, T., Shi, H., and Wei, T., Cerium tartrate as a corrosion inhibitor for AA2024-T3, Corros. Sci., 2015, vol. 95, p. 152.
  26. Kaur, G., Adhikari, R., and Cass, P., Electrically conductive polymers and composites for biomedical applications, RSC Adv., 2015, vol. 5, p. 37553.
  27. Forero López, A.D., Lehr, I.L., and Brugnoni, L.I., Improvement in the corrosion protection and bactericidal properties of AZ91D magnesium alloy coated with a microstructured polypyrrole film, J. Magnes. Alloys, 2018, vol. 6, p. 15.
  28. Grubac, Z., Skugor Roncevic, I., and Metikos-Hukovic, M., Corrosion properties of the Mg alloy coated with polypyrrole films, Corros. Sci., 2016, vol. 102, p. 310.
  29. Srinivasan, A., Ranjani, P., and Ranjendran, N., Electrochemical polymerization of pyrrole over AZ31 Mg alloy for biomedical applications, Electrochim. Acta, 2013, vol. 88, p. 310.
  30. Johansen, H.D., Brett, C.M.A., and Motheo, A.J., Corrosion protection of aluminum alloy by cerium conversion and conducting polymer duplex coatings, Corros. Sci., 2012, vol. 63, p. 342.
  31. Mastuli, M.S., Ansari, N.S., Nawawi, M.A., and Mahat, M.A., Effects of cationic surfactant in sol–gel synthesis of nano sized magnesium oxide, APCBEE Procedia, 2012, vol. 3, p. 93.
  32. Zulj, L.V., Serdar, M., and Martinez, S., Effect of tartrate on the electrochemical behaviour and semiconductive properties of passive film on steel in saturated calcium hydroxide, Mater. Corros., 2015, vol. 66, no. 11, p. 1344.
  33. Ghali, E., Corrosion Resistance of Aluminium and Magnesium Alloys: Understanding, Performance, and Testing, New Jersey: John Wiley & Sons, 2010, p. 338.
  34. Song, G.L., Corrosion of Magnesium Alloys, Cambridge: Woodhead Publishing in Materials, 2011, p. 395.
  35. Solmaz, R., Kardaş, G., Yazici, B., and Erbil, M., Citric acid as natural corrosion inhibitor for aluminium protection, Corros. Eng. Sci. Techn., 2008, vol. 43, no. 2, p. 186.
  36. Srinivasan, A., Blawert, C., and Huang, Y., Corrosion behavior of Mg–Gd–Zn based alloys in aqueous NaCl solution, J. Magnes. Alloys, 2014, vol. 2, p. 245.
  37. Yang, H., Guo, X., and Wu, G., Continuous intermetallic compounds coatings on AZ91D Mg alloy fabricated by diffusion reaction of Mg–Al couples, Surf. Coat. Technol., 2011, vol. 205, p. 290.
  38. Forero López, A.D., Lehr, I.L., and Saidman, S.B., Anodization of AZ91D magnesium alloy in molybdate solution for corrosion protection, J. Alloy. Compd., 2017, vol. 702, p. 338.
  39. Guo, K.W., A review of magnesium/magnesium alloys corrosion and its protection, Recent Pat. Corros. Sci., 2010, vol. 2, p. 13.
  40. Mu, S., Du, J., and Jiang, H., Composition analysis and corrosion performance of a Mo–Ce conversion coating on AZ91 magnesium alloy, Surf. Coat. Technol., 2014, vol. 254, p. 364.
  41. Lei, L., Shi, J., and Wang, X., Microstructure and electrochemical behavior of cerium conversion coating modified with silane agent on magnesium substrates, Appl. Surf. Sci., 2016, vol. 376, p. 161.
  42. Su, H., Chen, P., and Lin, C., Sol–gel coatings doped with organosilane and cerium to improve the properties of hot-dip galvanized steel, Corros. Sci., 2016, vol. 102, p. 63.
  43. Eslami, M., Fedel, M., and Speranza, G., Study of selective deposition mechanism of cerium-based conversion coating on Rheo-HPDC aluminum–silicon alloys, Electrochim. Acta, 2017, vol. 255, p. 449.
  44. Yu, X. and Li, G., XPS study of cerium conversion coating on the anodized 2024 aluminum alloy, J. Alloy. Compd., 2004, vol. 364, p. 193.
  45. Stejskal, J. and Trchová, M., Resonance Raman spectroscopy of conducting polypyrrole nanotubes: disordered surface versus ordered body, Chem. Pap., 2018, vol. 72, p. 1563.
  46. Parakhonskiy, B. and Shchukin, D., Polypyrrole microcontainers: electrochemical synthesis and characterization, Langmuir, 2015, vol. 31, no. 33, p. 9214.
  47. Uppalapati, D., Boyd, B.J., and Garg, S., Conducting polymers with defined micro- or nanostructured for drug delivery, Biomaterials, 2016, vol. 111, p. 149.
  48. Chen, J.C., Li, L.M., and Gao, J.Q., Biomaterials for local drug delivery in central nervous system, Int. J. Pharm., 2019, vol. 560, p. 92.
  49. Antony, N. and Mohanan, P.V., Template synthesized polypyrroles as a carrier for diastase alpha amylase immobilization, Biocatal. Agricult. Biotechnol., 2019, vol. 19, p. 101164.
  50. Devasurendra, A.M., Palagama, D.S.W., and Rohanifar, A., Solid-phase extraction, quantification, and selective determination of microcystins in water with a gold–polypyrrole nanocomposite sorbent material, J. Chromatogr. A, 2018, vol. 1560, p. 1.
  51. Pan, L., Chortos, A., and Yu, G., An ultra-sensitive resistive pressure sensor based on hollow-sphere microstructure induced elasticity in conducting polymer film, Nat. Commun., 2014, vol. 5, no. 1, p. 1.