Abstract
In this research corrosion behavior of the hexafluorozirconic acid-based conversion coating (ZrCC) applied on the surface of AA2024 aluminum alloy, in the absence and presence of sodium metavanadate (ZrVCC), has been investigated. At the first step, practical parameters of ZrCC conversion coating were optimized using data of polarization resistance (Rp) and corrosion current density (icorr) obtained from electrochemical impedance spectroscopy and polarization techniques, respectively. In the next step the effect of sodium metavanadate presence by assessment on the effect of parameters including concentration of sodium metavanadate, immersion time, and solution pH on surface and electrochemical properties was investigated. The optimized practical conditions for ZrCC were immersion time of 60 s in 0.01 M of H2ZrF6 solution at room temperature and solution pH = 2. For the ZrVCC sample, the best results appeared for the immersion time of 60 s in the bath containing 1 g/lit sodium metavanadate at room temperature and pH = 2. Corrosion current density value of the ZrVCC sample was 0.07 µA/cm2 which seems to be 10 times smaller than its amount for the uncoated sample. Film formation of conversion coatings was investigated by field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). FE-SEM and EDS test results revealed that zirconium compounds mostly precipitated on the surface of intermetallic particles.
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References
Valerie, G, Georges, M, “Localized Corrosion of 2024 T352 Aluminium Alloy in Chloride Media.” Corros. Sci., 41 421–438 (1999)
Buchheit, RG, Grant, RP, Hlava, PF, Mckenzie, B, Zender, GL, “Local Dissolution Phenomena Associated with S Phase (Al2CuMg) Particles in Aluminium Alloy 2024-T3.” J Electrochem. Soc., 144 2621–2628 (1997)
Kazemi, M, Danaee, I, “The Effect of Pre-anodizing on Corrosion Behavior of Silicate Conversion Coating on AA2024.” Mater. Chem. Phys., 148 223–229 (2014)
Yanga, L, Li, J, “Study of Molybdenum/Lanthanum-Based Composite Conversion Coatings on AZ31 Magnesium Alloy.” Appl. Surf. Sci., 257 2838–2842 (2011)
Ates, M, Kalender, O, Topkaya, E, Kamer, L, “Polyaniline and Polypyrrole/TiO2 Nanocomposite Coatings on Al1050: Electrosynthesis, Characterization and Their Corrosion Protection Ability in Saltwater Media.” Iran. Polym. J., 24 607–619 (2015)
Leblance, P, Frankel, GS, “A Study of Corrosion and Pitting Initiation of AA2024- T3 Using Atomic Force Microscopy.” J. Electrochem. Soc., 149 239–247 (2002)
Kaufman, JG, “Corrosion of Aluminum and Aluminum Alloys.” In: ASM Handbook, p. 13 (2005)
You, Sh, Jones, P, “Response of Nanocrystalline Cerium-Based Conversion Coatings on Al 2024-T3 to Chloride Environments.” Mater. Lett., 61 3778–3782 (2007)
Davis, JR, Corrosion of Aluminum and Aluminum Alloys, p. 25. ASM International, Materials Park (1999)
Boag, A, Hughes, AE, “Corrosion of AA2024-T3. Part I: Localized Corrosion of Isolated IM Particles.” Corros. Sci., 53 17–26 (2011)
Buchheit, RG, Grant, RP, “Local Dissolution Phenomena Associated with S Phase (Al2CuMg) Particles in Aluminum Alloy 2024-T3.” Electrochem. Soc., 144 2621–2628 (1997)
Hua, T, Shi, H, “Cerium Tartrate as a Corrosion Inhibitor for AA 2024-T3.” Corros. Sci, 95 152–161 (2015)
Yoganandan, G, Balaraju, JN, “The Surface and Electrochemical Analysis of Permanganate Based Conversion Coating on Alclad and Unclad 2024 Alloy.” Appl. Surf. Sci., 258 8880–8888 (2012)
Yoganandan, G, Pradeep Premkumar, K, “Evaluation of Corrosion Resistance and Self-healing Behavior of Zirconium–Cerium Conversion Coating Developed on AA2024 Alloy.” Surf. Coat. Technol., 270 249–258 (2015)
Balaraju, JN, Srinivasan, A, “Effect of Mn/Mo Incorporated Oxide Layer on the Corrosion Behavior of AA 2024 Alloy.” Corros. Sci, 53 4084–4092 (2011)
Castroa, MRS, Nogueirab, JC, “Adhesion and Corrosion Studies of a Lithium Based Conversion Coating Film on the 2024 Aluminum Alloy.” Thin Solid Films, 457 307–312 (2004)
Zhong, X, Wu, X, “Self-repairing Vanadium–Zirconium Composite Conversion Coating for Aluminum Alloys.” Appl. Surf. Sci., 280 489–493 (2013)
Gao, HF, Tan, HQ, “Synergistic Effect of Cerium Conversion Coating and Phytic Acid Conversion Coating on AZ31B Magnesium Alloy.” Surf. Coat. Technol., 212 32–36 (2012)
Johnson, Y, Edington, J, “Effect of Coating Parameters on the Microstructure of Cerium Oxide Conversion Coatings.” Mater. Sci. Eng., 61 225–231 (2003)
Kong, G, Liu, L, “Corrosion Behavior of Lanthanum-Based Conversion Coating Modified with Citric Acid on Hot Dip Galvanized Steel in Aerated 1 M NaCl Solution.” Corros. Sci., 53 1621–1626 (2011)
Eivaz Mohammadloo, H, Sarabi, AA, “Ti-Based Conversion Coatings on Cold-Rolled Steel Substrate: The Effect of Practical Parameters and Ti Source on Surface and Electrochemical Properties.” Corrosion, 72 (6) 791–804 (2016)
Eivaz Mohammadloo, H, Sarabi, AA, “Nano-ceramic Hexafluorozirconic Acid Based Conversion Thin Film: Surface Characterization and Electrochemical Study.” Surf. Coat. Technol., 206 4132–4139 (2012)
Guixiang, W, Milin, Z, “Molybdate and Molybdate/Permanganate Conversion Coatings on Mg–85Li Alloy.” Appl. Surf. Sci., 258 2648–2654 (2012)
Eivaz Mohammadloo, H, Sarabi, AA, “The Effect of Solution Temperature and pH on Corrosion Performance and Morphology of Nanoceramic-Based Conversion Thin Film.” Mater. Corros., 64 (6) 535–543 (2013)
Eivaz Mohammadloo, H, Sarabi, AA, “A Comprehensive Study of the Green Hexafluorozirconic Acid-Based Conversion Coating.” Prog. Org. Coat., 77 322–330 (2014)
Asemani, HR, Sarabi, AA, Eivaz Mohammadloo, H, Sarayloo, M, “Electrochemical and Morphological Properties of Zirconium Conversion Coating in the Presence of Nickel Ions on Galvanized Steel.” J. Coat. Technol. Res., 13 (5) 883–894 (2016)
Asemani, HR, Ahmadi, P, Sarabi, AA, Eivaz Mohammadloo, H, “Effect of Zirconium Conversion Coating: Adhesion and Anti-Corrosion Properties of Epoxy Organic Coating Containing Zinc Aluminum Polyphosphate (ZAPP) Pigment on Carbon Mild Steel.” Prog. Org. Coat., 94 18–27 (2016)
Mohammad Hosseini, R, Sarabi, AA, Eivaz Mohammadloo, H, Sarayloo, M, “The Performance Improvement of Zr Conversion Coating Through Mn Incorporation: With and Without Organic Coating.” Surf. Coat. Technol., 258 437–446 (2014)
Castro, M, Nogueira, J, Thim, G, Oliveira, M, “Adhesion and Corrosion Studies of a Lithium Based Conversion Coating Film on the 2024 Aluminum Alloy.” Thin solid films, 457 307–312 (2004)
Sharifi Golru, S, Attar, MM, “Morphological Analysis and Corrosion Performance of Zirconium Based Conversion Coating on the Aluminum Alloy 1050.” J. Ind. Eng. Chem., 24 233–244 (2015)
Yi, A, Du, J, Wang, J, Mu, S, “Preparation and Characterization of Colored Ti/Zr Conversion Coating on AZ91D Magnesium Alloy.” Surf. Coat. Technol., 276 239–247 (2015)
Chen, X, Li, G, “Study of the Formation and Growth of Tannic Acid Based Conversion Coating on AZ91D Magnesium Alloy.” Surf. Coat. Technol., 204 736–747 (2009)
Rosalbino, F, Carlini, R, Zanicchi, G, Scavino, G, “Effect of copper alloying addition on the electrochemical corrosion behaviour of Fe3Al intermetallic in sulphuric acid solution.” Mater. Corros., 67 1042–1048 (2016)
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Ahmadi, P., Sarabi, A.A., Eivaz Mohammadloo, H. et al. Effect of practical parameters on the structure and corrosion behavior of vanadium/zirconium conversion coating on AA 2024 aluminum alloy. J Coat Technol Res 16, 1503–1513 (2019). https://doi.org/10.1007/s11998-019-00215-4
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DOI: https://doi.org/10.1007/s11998-019-00215-4