Effect of Electrolyte on Micro Arc Oxidation Coating of Al-2014 Alloy


Article Preview

Micro Arc Oxidation (MAO) coating was performed on Al-2014 aluminium alloy in aqueous solution of silicate, phosphate and hybrid electrolytic environments. The MAO thickness was measured around 5-15 μm, in which significant thickness of both dense and porous layers were identified. A combination of nanocrystalline α-Al2O3and Υ-Al2O3 was identified in the MAO coating using X-ray diffraction analysis. The thickness and morphology of the coating, which is analyzed using SEM are different for different MAO process parameters and it was found that the MAO coating prepared in phosphate electrolyte is giving a better coating with higher coating thickness, minor pore size and better adherence.



Edited by:

Swami Naidu Gurugubelli and K Siva Prasad




M.P. Shankar et al., "Effect of Electrolyte on Micro Arc Oxidation Coating of Al-2014 Alloy", Advanced Materials Research, Vol. 1148, pp. 159-164, 2018

Online since:

June 2018




* - Corresponding Author

[1] Changzheng Wang, Dong Zhang, Yongfeng Jiang, Growth process and wear resistance for ceramic coatings formed on Al–Cu–Mg alloy by micro-arc oxidation, Applied Surface science. 253 (2006) 674-678.

DOI: https://doi.org/10.1016/j.apsusc.2005.12.156

[2] H.X. Li, V.S. Rudnev, X.H. Zheng, T.P. Yarovaya, R.G. Song, Characterization of Al2O3 ceramic coatings on 6063 aluminum alloy prepared in borate electrolytes by micro-arc oxidation, Journal of Alloys and Compounds, 462(2008) 99-102.

DOI: https://doi.org/10.1016/j.jallcom.2007.08.046

[3] A. K. Lakshminarayanan, V. Balasubramanian, K. Elangovan, Effect of welding processes on tensile properties of AA6061 aluminium alloy joints, Int J Adv Manuf Technol 40 (2009) 286–296.

DOI: https://doi.org/10.1007/s00170-007-1325-0

[4] E. Arslan, Y. Totik, E.E. Demirci, Y. Vangolu, A. Alsaran, I. Efeoglu, High temperature wear behavior of aluminum oxide layers produced by AC micro arc oxidation, Surface and Coatings Technology, 204 (2009) 829–833.

DOI: https://doi.org/10.1016/j.surfcoat.2009.09.057

[5] A. Venugopal, R. Panda, S. Manwatkar, K. Sreekumar, L.R. Krishna, G. Sundararajan, Effect of Micro Arc Oxidation Treatment on Localized Corrosion Behaviour of AA7075 Aluminum Alloy in 3.5 NaCl Solution, Trans. Nonferrous Met. Soc. China, 2012, 22, p.700.

DOI: https://doi.org/10.1016/s1003-6326(11)61234-x

[6] D. Sreekanth, N. Rameshbabu, K. Venkateswarlu, Effect of various additives on morphology and corrosion behavior of ceramic coatings developed on AZ31 magnesium alloy by plasma electrolytic oxidation, Ceramics International 38 (2012) 4607–4615.

DOI: https://doi.org/10.1016/j.ceramint.2012.02.040

[7] K. Venkateswarlu, N. Rameshbabu, D. Sreekanth, A.C. Bose, V. Muthupandi, S. Subramanian, Fabrication and characterization of micro-arc oxidized fluoride containing titania films on Cp Ti, Ceramics International 39 (2013) 801–812.

DOI: https://doi.org/10.1016/j.ceramint.2012.07.001

[8] M Sandhyarani, M Ashfaq, T Arunnellaiappan, MP Selvan, S Subramanian, N Rameshbabu, Effect of electrical parameters on morphology and in-vitro corrosion resistance of plasma electrolytic oxidized films formed on zirconium, Surface & Coatings Technology 269 (2015).

DOI: https://doi.org/10.1016/j.surfcoat.2015.03.001

[9] Yang Guangliang, Lu Xianyi, Bai Yizhen, Cui Haifeng, Jin Zengsun, The effects of current density on the phase composition and microstructure properties of micro-arc oxidation coating, Journal of Alloys and Compounds 345 (2002) 196–200.

DOI: https://doi.org/10.1016/s0925-8388(02)00289-x

[10] X. Nie, A. Leyland, A. Matthews, Review: plasma electrolysis for surface engineering, Surf. & Coat. Techno l.125 (2000)407-414.

[11] W. Krysmann, P. Kurze, K.H. Dittrich, H. G. Schne, Process characteristics and parameters of Anodic Oxidation by spark discharge (ANOF), Crystal Res. Technology 19 (1984) 973-979.

DOI: https://doi.org/10.1002/crat.2170190721

[12] P.Kurze, K.H. Dittrich, W. Krysmann, Crystal Research and Technology22 (1987) P. Kurze, W. Krysmann, J. Schreckenbach, Th. Schwarz, K. Rabending, Coloured ANOF layers on aluminium, Crystal Research and Technology 22(1987) 53 - 58.

DOI: https://doi.org/10.1002/crat.2170220115

[13] W.Xue, Z. Deng, R.Chen, Growth regularity of ceramic coatings formed by microarc oxidation on Al–Cu–Mg alloy, Thin solid films 372 (2000) 114-117.

DOI: https://doi.org/10.1016/s0040-6090(00)01026-9