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Effect of Current Density on Microstructure and Corrosion Behavior of Plasma Electrolytic Oxidation Coated 6063 Aluminum Alloy

  • Junjie Zhuang (庄俊杰)
  • Renguo Song (宋仁国)Email author
  • Chuanbo Zheng
Metallic Materials
  • 9 Downloads

Abstract

Plasma electrolytic oxidation (PEO) coatings were fabricated on 6063 aluminum alloy in a cheap and convenient electrolyte. The effect of different current densities, i e, 5, 10, 15, and 20 A/dm2 on the microstructure and corrosion behavior of coatings was comprehensively studied by scanning electron microscopy (SEM), stereoscopic microscopy, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), respectively. It is found that the pore density decreases and the pore size increases with increasing current density. The XRD results show that the coatings are only composed of α-Al2O3 and γ-Al2O3. Potentiodynamic polarization test proves that the coating formed under 10 A/dm2 possesses the best anticorrosion property. The long time EIS test shows that the coating under 10 A/dm2 is able to protect the aluminum alloy substrate after long time of immersion in 0.59 M NaCl solution, which confirms the salt solution immersion test results in 2 M NaCl solution.

Key words

coating 6063 aluminum alloy plasma electrolytic oxidation (PEO) current density corrosion resistance 

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References

  1. [1]
    Song RG, Dietzel W, Zhang BJ, et al. Stress Corrosion Cracking and Hydrogen Embrittlement of an Al–Zn–Mg–Cu Alloy[J]. Acta Mater., 2004, 52(16): 4 727–4 743CrossRefGoogle Scholar
  2. [2]
    Li HX, Song RG, Ji ZG. Effects of Nanoadditive TiO2 on Performance of Micro–arc Oxidation Coatings Formed on 6063 Aluminum Alloy[J]. T. Nonferr. Metal. Soc., 2013, 23: 406–411CrossRefGoogle Scholar
  3. [3]
    Qi X, Jin JR, Dai CL, et al. A Study on the Susceptibility to SCC of 7050 Aluminum Alloy by DCB Specimens[J]. Materials, 2016, 9(11): 884CrossRefGoogle Scholar
  4. [4]
    Dehnavi V, Shoesmith DW, Luan BL, et al. Corrosion Properties of Plasma Electrolytic Oxidation Coatings on an Aluminium Alloy–The Effect of the PEO Process Stage[J]. Mater. Chem. Phys., 2015, 161: 49–58CrossRefGoogle Scholar
  5. [5]
    Qi X, Song RG, Qi WJ, et al. Correspondence between Susceptibility to SCC of 7050 Aluminum Alloy and Passive Film Induced Stress at Various pH Values[J]. J. Wuhan University of Technology–Mater. Sci. Ed., 2017, 32(1): 173–178CrossRefGoogle Scholar
  6. [6]
    Zheng CB, Yan BH, Zhang K, et al. Electrochemical Investigation of Hydrogen Permeation Behavior of 7075 T6 Al Alloy and Its Implication on Stress Corrosion Cracking[J]. Int. J. Miner. Metall. Mater., 2015, 22(7): 729–737CrossRefGoogle Scholar
  7. [7]
    Gao HT, Zhang M, Yang X, et al. Effect of Na2SiO3 Solution Concentration of Micro–arc Oxidation Process on Lap–shear Strength of Adhesive–bonded Magnesium Alloys[J]. Appl. Surf. Sci., 2014, 314: 447–452CrossRefGoogle Scholar
  8. [8]
    Fadaee H, Javidi M. Investigation on the Corrosion Behaviour and Microstructure of 2024–T3 Al Alloy Treated Via Plasma Electrolytic Oxidation[J]. J. Alloys Compd., 2014, 604: 36–42CrossRefGoogle Scholar
  9. [9]
    Xiang N, Song RG, Zhao J, et al. Microstructure and Mechanical Properties of Ceramic Coatings Formed on 6063 Aluminium Alloy by Micro–arc Oxidation[J]. T. Nonferr. Metal. Soc., 2015, 25: 3323–3328CrossRefGoogle Scholar
  10. [10]
    Erarslan Y. Wear Performance of In–situ Aluminum Matrix Composite After Micro–arc Oxidation[J]. T. Nonferr. Metal. Soc., 2013, 23: 347–352CrossRefGoogle Scholar
  11. [11]
    Zhuang JJ, Guo YQ, Xiang N, et al. A Study on Microstructure and Corrosion Resistance of ZrO2–containing PEO Coatings Formed on AZ31 Mg Alloy in Phosphate–based Electrolyte[J]. Appl. Surf. Sci.,2015, 357: 1 463–1 471Google Scholar
  12. [12]
    Zhuang JJ, Song RG, Li HX, et al. Effect of Various Additives on Performance of Plasma Electrolytic Oxidation Coatings Formed on AZ31 Magnesium Alloy in the Phosphate Electrolytes[J]. J. Wuhan University of Technology–Mater. Sci. Ed., 2018, 33(3): 703–709CrossRefGoogle Scholar
  13. [13]
    Zhang XL, Jiang ZH, Yao ZP, et al. Electrochemical Study of Growth Behaviour of Plasma Electrolytic Oxidation Coating on Ti6Al4V: Effects of the Additive[J]. Corros. Sci., 2010, 52: 3 465–3 473CrossRefGoogle Scholar
  14. [14]
    Lu JP, He X, Li HX, et al. Microstructures and Corrosion Resistance of PEO Coatings Formed on KBM10 Mg Alloy Pretreated with Nd(NO3)3[J]. Materials, 2018, 11(6): 1 062CrossRefGoogle Scholar
  15. [15]
    Shokouhfar M, Dehghanian C, Baradaran A. Preparation of Ceramic Coating on Ti Substrate by Plasma Electrolytic Oxidation in Different Electrolytes and Evaluation of its Corrosion Resistance[J]. Appl. Surf. Sci., 2011, 257: 2 617–2 624CrossRefGoogle Scholar
  16. [16]
    Srinivasan PB, Liang J, Blawert C, et al. Environmentally Assisted Cracking Behaviour of Plasma Electrolytic Oxidation Coated AZ31 Magnesium Alloy[J]. Corros. Eng. Sci. Technol., 2011, 46: 706–711CrossRefGoogle Scholar
  17. [17]
    Jung YC, Shin KR, Ko YG, et al. Surface Characteristics and Biological Response of Titanium Oxide Layer Formed Via Microarc Oxidation in K3PO4 and Na3PO4 Electrolytes[J]. J. Alloys Compd., 2014, 586: S548–S552Google Scholar
  18. [18]
    Wang CJ, Jiang BL, Liu M, et al. Corrosion Characterization of Micro–arc Oxidization Composite Electrophoretic Coating on AZ31B Magnesium Alloy[J]. J. Alloys Compd., 2015, 621: 53–61CrossRefGoogle Scholar
  19. [19]
    Li ZJ, Yuan Y, Jing XY. Comparison of Plasma Electrolytic Oxidation Coatings on Mg–Li Alloy Formed in Molybdate/silicate and Aluminate/silicate Composite Electrolytes[J]. Mater. Corros., 2014, 65: 493–501CrossRefGoogle Scholar
  20. [20]
    Cheng YL, Qin TW, Li LL, et al. Comparison of Corrosion Resistance of Microarc Oxidation Coatings Prepared with Different Electrolyte Concentrations on AM60 Magnesium Alloy[J]. Corros. Eng. Sci. Technol., 2011, 46: 17–23CrossRefGoogle Scholar
  21. [21]
    Hussein RO, Northwood DO, Nie X. The Effect of Processing Parameters and Substrate Composition on the Corrosion Resistance of Plasma Electrolytic Oxidation (PEO) Coated Magnesium Alloys[J]. Surf. Coat. Technol., 2013, 237: 357–368CrossRefGoogle Scholar
  22. [22]
    Pan YK, Wang DG, Chen CZ. Effects of Negative Voltage on the Microstructure, Degradability and in Vitro Bioactivity of Microarc Oxidized Coatings on ZK60 Magnesium Ally[J]. Mater. Lett., 2014, 119: 127–130CrossRefGoogle Scholar
  23. [23]
    Fadaee H, Javidi M. Investigation on the Corrosion Behaviour and Microstructure of 2024–T3 Al Alloy Treated Via Plasma Electrolytic Oxidation[J]. J. Alloys Compd., 2014, 604: 36–42CrossRefGoogle Scholar
  24. [24]
    Lim TS, Ryu HS, Hong SH. Electrochemical Corrosion Properties of CeO2–containing Coatings on AZ31 Magnesium Alloys Prepared by Plasma Electrolytic Oxidation[J]. Corros. Sci., 2012, 62: 104–111CrossRefGoogle Scholar
  25. [25]
    Liang J, Guo BG, Tian J, et al. Effect of Potassium Fluoride in Electrolytic Solution on the Structure and Properties of Microarc Oxidation Coatings on Magnesium Alloy[J]. Appl. Surf. Sci., 2005, 252: 345–351CrossRefGoogle Scholar
  26. [26]
    Luo Q, Li XW, Cai QZ, et al. Preparation of Narrow Band Gap V2O5/TiO2 Composite Films by Micro–arc Oxidation[J]. Int. J. Min. Met. Mater., 2012, 19: 1 045–1 051CrossRefGoogle Scholar
  27. [27]
    Cao CN, Zhang JQ. An Introduction to Electrochemical Impedance Spectroscopy[M]. Beijing:Science Press, 2002: 158 (in Chinese)Google Scholar

Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Junjie Zhuang (庄俊杰)
    • 1
    • 2
    • 3
  • Renguo Song (宋仁国)
    • 1
    • 2
    • 3
    Email author
  • Chuanbo Zheng
    • 4
  1. 1.School of Materials Science and EngineeringChangzhou UniversityChangzhouChina
  2. 2.Jiangsu Key Laboratory of Materials Surface Science and TechnologyChangzhou UniversityChangzhouChina
  3. 3.Jiangsu Collaborative Innovation Center of Photovolatic Science and EngineeringChangzhou UniversityChangzhouChina
  4. 4.School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiangChina

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