Effect of Cerium Nitrate on the Protective and Adhesion Properties of PEO/Epoxy Coating Applied on Mg alloy

Document Type : Original Article

Author

Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran

Abstract

In this study the effect of cerium nitrate existing in the structure of plasma electrolytic oxidation (PEO) coating on the protective behavior and adhesion strength of PEO/epoxy duplex coating applied on AZ31 Mg alloy was investigated. PEO coating was considered as the pretreatment for applying the epoxy layer. The presence of Ce additive affected the morphology of the surface of the PEO coating and its corrosion resistance. Embedding Ce in the structure of the PEO layer showed that the PEO structure, in addition to its pretreatment role, acts as the container of cerium. The results of the electrochemical impedance spectroscopy (EIS) test and the pull-off adhesion test in dry and wet conditions on duplex coatings revealed that the presence of Ce improves the protective behavior of the epoxy layer and its adhesion strength. Formation of cerium hydroxide in chathodic regions leads to improvement in the protection properties of duplex coating system.

Keywords

Main Subjects

References

  1.  R. c. Zeng, J. Zhang, W. j. Huang, W. Dietzel, K. U. Kainer, C. Blawert, W. Ke, Review of studies on corrosion of magnesium alloys. Trans. Nonferrous Met. Soc. China. 16(2006), 763-771.
  2. J. E. Gray, B. Luan, Protective coatings on magnesium and its alloys—a critical review. J. Alloys Compd. 336(2002), 88-113.
  3. G. Song, B. Johannesson, S. Hapugoda, D. StJohn, Galvanic corrosion of magnesium alloy AZ91D in contact with an aluminium alloy, steel and zinc. Corros. Sci. 46(2004), 955-977.
  4. A. Coy, F. Viejo, P. Skeldon, G. Thompson, Susceptibility of rare-earth-magnesium alloys to micro-galvanic corrosion. Corros. Sci. 52(2010), 3896-3906.
  5. H. Y. Yang, X. B. Chen, X. W. Guo, G. H. Wu, W. J. Ding, N. Birbilis, Coating pretreatment for Mg alloy AZ91D. Appl. Surf. Sci. 258(2012), 5472-5481.
  6. A. L. K. Tan, A. M. Soutar, I. F. Annergren, Y. N. Liu, Multilayer sol–gel coatings for corrosion protection of magnesium. Surf. Coat. Technol. 198 (2005) 478-482.
  7. S. Zheng, J. Li, Inorganic–organic sol gel hybrid coatings for corrosion protection of metals. J. Sol-Gel Sci. Technol. 54(2010) 174-187.
  8. X. Lu, S.P. Sah, N. Scharnagl, M. Störmer, M. Starykevich, M. Mohedano, C. Blawert, M.L. Zheludkevich, K.U. Kainer, Degradation behavior of PEO coating on AM50 magnesium alloy produced from electrolytes with clay particle addition. Surf. Coat. Technol. 269(2015), 155-169.
  9. L. Zeng, S. Yang, W. Zhang, Y. Guo, C. Yan, Preparation and characterization of a double-layer coating on magnesium alloy AZ91D. Electrochim. Acta. 55(2010), 3376-3383.
  10. M. Toorani, M. Aliofkhazraei, A. Sabour Rouhaghdam, Microstructural, protective, inhibitory and semiconducting properties of PEO coatings containing CeO2 nanoparticles formed on AZ31 Mg alloy. Surf. Coat. Technol.325(2018), 561-580.
  11. M. Toorani, M. Aliofkhazraei, Review of electrochemical properties of hybrid coating systems on Mg with plasma electrolytic oxidation process as pretreatment, Surfaces and Interfaces, 14 (2019) 262-295.
  12. H. S. Ryu, D. S. Park, S. H. Hong, Improved corrosion protection of AZ31 magnesium alloy through plasma electrolytic oxidation and aerosol deposition duplex treatment. Surf. Coat. Technol. 219(2013), 82-87.
  13. S. Sun, J. Liu, C. Yan, F. Wang, A novel process for electroless nickel plating on anodized magnesium alloy. Appl. Surf. Sci. 254(2008), 5016-5022.
  14. M. Zhao, S. Wu, P. An, J. Luo, Influence of surface pretreatment on the chromium-free conversion coating of magnesium alloy. Mater. Chem. Phys. 103(2007), 475-483.
  15. M. Toorani, M. Aliofkhazraei, M. Golabadi, A. S. Rouhaghdam, Effect of lanthanum nitrate on the microstructure and electrochemical behavior of PEO coatings on AZ31 Mg alloy. J. Alloys Compd. 719(2017), 242-255.
  16. T. S. N. Sankara Narayanan, I. S. Park, M. H. Lee, Strategies to improve the corrosion resistance of microarc oxidation (MAO) coated magnesium alloys for degradable implants: Prospects and challenges. Prog. Mater. Sci. 60 (2014), 1-71.
  17. R. H. Rad, M. Toorani, H. Zarei, Corrosion behavior and adhesion strength of PEO/Epoxy duplex coating applied on aluminum alloy. Anti-Corros. Methods Mater. 66(2019), 138-147.
  18. E. Matykina, R. Arrabal, F. Monfort, P. Skeldon, G. Thompson, Incorporation of zirconia into coatings formed by DC plasma electrolytic oxidation of aluminium in nanoparticle suspensions. Appl. Surf. Sci. 255(2008), 2830-2839.
  19. G. B. Darband, M. Aliofkhazraei, P. Hamghalam, N. Valizade, Plasma electrolytic oxidation of magnesium and its alloys: Mechanism, properties and applications. J. Magnesium Alloys. 5(2017), 74-132.
  20. G. Rapheal, S. Kumar, N. Scharnagl, C. Blawert, Effect of current density on the microstructure and corrosion properties of plasma electrolytic oxidation (PEO) coatings on AM50 Mg alloy produced in an electrolyte containing clay additives. Surf. Coat. Technol. 289(2016), 150-164.
  21. G. H. Lv, H. Chen, W. C. Gu, L. Li, E. W. Niu, X. H. Zhang, S. Z. Yang, Effects of current frequency on the structural characteristics and corrosion property of ceramic coatings formed on magnesium alloy by PEO technology. J. Mater. Process. Technol. 208(2008), 9-13.
  22. P. Shi, W. Ng, M. Wong, F. Cheng, Improvement of corrosion resistance of pure magnesium in Hanks’ solution by microarc oxidation with sol–gel TiO2 sealing. J. Alloys Compd. 469(2009), 286-292.
  23. W. Shang, B. Chen, X. Shi, Y. Chen, X. Xiao, Electrochemical corrosion behavior of composite MAO/sol–gel coatings on magnesium alloy AZ91D using combined micro-arc oxidation and sol–gel technique. J. Alloys Compd. 474(2009), 541-545.
  24. S. Di, Y. Guo, H. Lv, J. Yu, Z. Li, Microstructure and properties of rare earth CeO2-doped TiO2 nanostructured composite coatings through micro-arc oxidation. Ceram. Int., 41 (2015), 6178-6186.
  25. J. J. Zhuang, Y. Q. Guo, N. Xiang, Y. Xiong, Q. Hu, R. G. Song, A study on microstructure and corrosion resistance of ZrO2-containing PEO coatings formed on AZ31 Mg alloy in phosphate-based electrolyte. Appl. Surf. Sci. 357 (2015), 1463-1471.
  26. T. Seop Lim, H. Sam Ryu, S. H. Hong, Plasma electrolytic oxidation/cerium conversion composite coatings for the improved corrosion protection of AZ31 Mg alloys. J. Electrochem. Soc. 160(2012), 77-82.
  27. N. V. Phuong, B. R. Fazal, S. Moon, Cerium- and phosphate-based sealing treatments of PEO coated AZ31 Mg alloy. Surf. Coat. Technol, 309(2017), 86-95.
  28. B. Mingo, R. Arrabal, M. Mohedano, Y. Llamazares, E. Matykina, A. Yerokhin, A. Pardo, Influence of sealing post-treatments on the corrosion resistance of PEO coated AZ91 magnesium alloy. Appl. Surf. Sci. 433(2018), 653-667.
  29. L. Pezzato, K. Brunelli, R. Babbolin, P. Dolcet, M. Dabalà, Sealing of PEO coated AZ91 magnesium alloy using La-based solutions. Int. J. Corros. (2017), Doi: 10.1155/2017/5305218.
  30. F. Peng, D. Wang, Y. Tian, H. Cao, Y. Qiao, X. Liu, Sealing the Pores of PEO coating with Mg-Al layered double hydroxide: enhanced corrosion resistance, cytocompatibility and drug delivery ability. Sci. Rep. 7(2017), 1-12.
  31. D. K. Ivanou, M. Starykevich, A. D. Lisenkov, M. L. Zheludkevich, H. B. Xue, S. V. Lamaka, M. G. S. Ferreira, Plasma anodized ZE41 magnesium alloy sealed with hybrid epoxy silane coating. Corros. Sci. 73(2013), 300-308.
  32. M. Toorani, M. Aliofkhazraei, R. Naderi, M. Golabadi, A. S. Rouhaghdam, Role of lanthanum nitrate in protective performance of PEO/Epoxy double layer on AZ31 Mg alloy: Electrochemical and Thermodynamic Investigations. J. Ind. Eng. Chem. 53(2017),  213-227.
  33. J. Yang, C. Blawert, S.V. Lamaka, D. Snihirova, X. Lu, S. Di, M. L. Zheludkevich, Corrosion protection properties of inhibitor containing hybrid PEO-epoxy coating on magnesium. Corros. Sci. 140(2018), 99-110.
  34. M. Golabadi, M. Aliofkhazraei, M. Toorani, A. S. Rouhaghdam, Evaluation of La containing PEO pretreatment on protective performance of epoxy coating on magnesium. Prog. Org. Coat. 105(2017), 258-266.
  35. J. Simancas, D. de la Fuente, B. Chico, L. Madueño, F. Camón, M. Blanco, M. Morcillo, Anticorrosive behaviour of Cr (VI)-free surface pretreatments applied on magnesium alloys. Prog. Org. Coat. 76(2013), 1833-1840.
  36. R. Arrabal, J. Mota, A. Criado, A. Pardo, M. Mohedano, E. Matykina, Assessment of duplex coating combining plasma electrolytic oxidation and polymer layer on AZ31 magnesium alloy. Surf. Coat. Technol. 206(2012), 4692-4703.
  37. T. S. Lim, H. S. Ryu, S. H. Hong, Electrochemical corrosion properties of CeO2-containing coatings on AZ31 magnesium alloys prepared by plasma electrolytic oxidation. Corros. Sci. 62(2012), 104-111.
  38. M. Asgari, M. Aliofkhazraei, G.B. Darband, A.S. Rouhaghdam, Evaluation of alumina nanoparticles concentration and stirring rate on wear and corrosion behavior of nanocomposite PEO coating on AZ31 magnesium alloy. Surf. Coat. Technol. 309(2017), 124-135.
  39. M. Mohedano, M. Serdechnova, M. Starykevich, S. Karpushenkov, A. Bouali, M. Ferreira, M. Zheludkevich, Active protective PEO coatings on AA2024: Role of voltage on in-situ LDH growth. Mater. Des. 120 (2017), 36-46.
  40. M. Sun, A. Matthews, A. Yerokhin, Plasma electrolytic oxidation coatings on cp-Mg with cerium nitrate and benzotriazole immersion post-treatments. Surf. Coat. Technol. 344(2018), 330-341.
  41. N. Voevodin, N. Grebasch, W. Soto, F. Arnold, M. Donley, Potentiodynamic evaluation of sol–gel coatings with inorganic inhibitors. Surf. Coat. Technol. 140(2001), 24-28.
  42. H. Duan, C. Yan, F. Wang, Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D. Electrochim. Acta. 52(2007), 3785-3793.
  43. C. Blawert, V. Heitmann, W. Dietzel, H. Nykyforchyn, M. Klapkiv, Influence of electrolyte on corrosion properties of plasma electrolytic conversion coated magnesium alloys. Surf. Coat. Technol. 201(2007), 8709-8714.
  44. J. Li, Effects of rare earths on the microarc oxidation of a magnesium alloy. Rare Metals. 27(2008), 50-54.
  45. J. Cai, F. Cao, L. Chang, J. Zheng, J. Zhang, C. Cao, The preparation and corrosion behaviors of MAO coating on AZ91D with rare earth conversion precursor film. Appl. Surf. Sci. 257(2011), 3804-3811.
  46. A. Yerokhin, X. Nie, A. Leyland, A. Matthews, S. Dowey, Plasma electrolysis for surface engineering. Surf. Coat. Technol. 122(1999), 73-93.
  47. S. Stojadinović, M. Perić, J. Radić-Perić, R. Vasilić, M. Petković, L. Zeković, Luminescence of the B 1 Σ+–X 1 Σ+ band system of MgO during plasma electrolytic oxidation of magnesium alloy. Surf. Coat. Technol. 206(2012), 2905-2913.
  48. M. Toorani, M. Aliofkhazraei, M. Mahdavian, R. Naderi, Effective PEO/Silane Pretreatment of Epoxy Coating Applied on AZ31B Mg Alloy for Corrosion Protection. Corros. Sci. 169(2020), 108608
  49. P. Zoltowski, On the electrical capacitance of interfaces exhibiting constant phase element behaviour. J. Electroanal. Chem. 443(1998), 149-154.
  50. E. Saei, B. Ramezanzadeh, R. Amini, M. S. Kalajahi, Effects of combined organic and inorganic corrosion inhibitors on the nanostructure cerium based conversion coating performance on AZ31 magnesium alloy: Morphological and corrosion studies. Corros. Sci. 127(2017), 186-200.
  51. F. Brusciotti, D. V. Snihirova, H. Xue, M. F. Montemor, S. V. Lamaka, M. G. S. Ferreira, Hybrid epoxy–silane coatings for improved corrosion protection of Mg alloy. Corros. Sci. 67 (2013), 82-90.
  52. M. Mahdavian, M. M. Attar, Another approach in analysis of paint coatings with EIS measurement: Phase angle at high frequencies. Corros. Sci. 48(2006), 4152-4157.
  53. S. V. Lamaka, G. Knörnschild, D. V. Snihirova, M. G. Taryba, M.L. Zheludkevich, M.G.S. Ferreira, Complex anticorrosion coating for ZK30 magnesium alloy. Electrochim. Acta. 55(2009), 131-141.
  54. R. Naderi, M. Mahdavian, A. Darvish, Electrochemical examining behavior of epoxy coating incorporating zinc-free phosphate-based anticorrosion pigment. Prog. Org. Coat. 76(2013), 302-306.
  55. M. Moradi, M. Aliofkhazraei, M. Toorani, A. Golgoon, A.S. Rouhaghdam, SiAlON–epoxy nanocomposite coatings: Corrosion and wear behavior. J. Appl. Polym. Sci. 133 (2016), 43855.
  56. E. Potvin, L. Brossard, G. Larochelle, Corrosion protective performances of commercial low-VOC epoxy/urethane coatings on hot-rolled 1010 mild steel. Prog. Org. Coat. 31(1997), 363-373.
  57. J.R. Scully, Electrochemical Impedance of Organic‐Coated Steel: Correlation of Impedance Parameters with Long‐Term Coating Deterioration. J. Electrochem. Soc. 136(1989), 979-990.
  58. X. Lu, X. Feng, Y. Zuo, C. Zheng, S. Lu, L. Xu, Evaluation of the micro-arc oxidation treatment effect on the protective performance of a Mg-rich epoxy coating on AZ91D magnesium alloy. Surf. Coat. Technol., 270(2015), 227-235.
  59. M. Toorani, M. Aliofkhazraei, M. Mahdavian, R. Naderi, Superior corrosion protection and adhesion strength of epoxy coating applied on AZ31 magnesium alloy pre-treated by PEO/Silane with inorganic and organic corrosion inhibitors. Corros. Sci. 178 (2021), 109065.
  60. K. M. Lee, K. R. Shin, S. Namgung, B. Yoo, D. H. Shin, Electrochemical response of ZrO 2-incorporated oxide layer on AZ91 Mg alloy processed by plasma electrolytic oxidation. Surf. Coat. Technol. 205(2011), 3779-3784.
  61. T. S. Lim, H. S. Ryu, S. H. Hong, Electrochemical corrosion properties of CeO2-containing coatings on AZ31 magnesium alloys prepared by plasma electrolytic oxidation. Corros. Sci. 62(2012), 104-111.
  62. M. Toorani, M. Aliofkhazraei, R. Naderi, Ceria-embedded MAO process as pretreatment for corrosion protection of epoxy films applied on AZ31-magnesium alloy. J. Alloys Compd. 785(2019), 669-683.
  63. R. Hussein, D. Northwood, X. Nie, The effect of processing parameters and substrate composition on the corrosion resistance of plasma electrolytic oxidation (PEO) coated magnesium alloys. Surf. Coat. Technol. 237(2013), 357-368.
  64. K. C. Tekin, U. Malayoğlu, S. Shrestha, Electrochemical behavior of plasma electrolytic oxide coatings on rare earth element containing Mg alloys. Surf. Coat. Technol. 236(2013), 540-549.
  65. P. B. Srinivasan, N. Scharnagl, C. Blawert, W. Dietzel, Enhanced corrosion protection of AZ31 magnesium alloy by duplex plasma electrolytic oxidation and polymer coatings. Surf. Eng. 26(2010), 354-360.
  66. K. M. Lee, K. R. Shin, S. Namgung, B. Yoo, D. H. Shin, Electrochemical response of ZrO2-incorporated oxide layer on AZ91 Mg alloy processed by plasma electrolytic oxidation. Surf. Coat. Technol. 205(2011), 3779-3784.
  67. C. Hsu, F. Mansfeld, Concerning the conversion of the constant phase element parameter Y0 into a capacitance. Corrosion. 57 (2001), 747-748.
  68. H. Ardelean, I. Frateur, S. Zanna, A. Atrens, P. Marcus, Corrosion protection of AZ91 magnesium alloy by anodizing in niobium and zirconium-containing electrolytes. Corros. Sci. 51(2009), 3030-3038.
  69. E. Ghali, W. Dietzel, K. U. Kainer, General and localized corrosion of magnesium alloys: a critical review. J. Mater. Eng. Perform. 13(2004), 7-23.
  70. M. Montemor, A. Simoes, M. Carmezim, Characterization of rare-earth conversion films formed on the AZ31 magnesium alloy and its relation with corrosion protection. Appl. Surf. Sci. 253(2007), 6922-6931.
  71. M. L. Z. K. A. Yasakau, M. G. S. Ferreira, Lanthanide Salts as Corrosion Inhibitors for AA5083, Mechanism and Efficiency of Corrosion Inhibition. J. Electrochem. Soc. 155(2008), 169-177.
  72. K. Murakami, M. Hino, K. Nakai, S. Kobayashi, A. Saijo, T. Kanadani, Mechanism of corrosion protection of anodized magnesium alloys. Mater. Trans. 49(2008), 1057-1064.
  73. A. S. Gnedenkov, S. L. Sinebryukhov, D. V. Mashtalyar, S. V. Gnedenkov, Localized corrosion of the Mg alloys with inhibitor-containing coatings: SVET and SIET studies. Corros. Sci. 102(2016), 269-278.
  74. J. De Damborenea, Corrosion inhibition with rare earth metal compounds in aqueous solutions, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Spain.
Journal of Color Science and Technology
Volume 15, Issue 1
April 2021
Pages 55-70

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