Evaluation of Electrochemical Properties of the PEO-Coatings Treated with Hydrophobic Agent Solution on Aluminium Alloy

Abstract:

The developed methods of formation and results of the study of the hydrophobic layers on aluminum alloy, previously subjected to plasma electrolytic oxidation (PEO) and additional treatment (either in ethanol solution or under UV-radiation in the presence of ozone plasma) with subsequent deposition of the hydrophobic agent (methoxy-{3-[(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluoroctyl) oxy] propyl}-silane solution in decane) have been described. It was found, that the formed composite layers possess a hydrophobicity (contact angle higher 157o) and high anticorrosion properties (the impedance modulus, |Z|_{f = 0.01 Hz}, ranges from 9.2·10⁹ to 4.0·10¹⁰ Оhm·cm² depending on the treatment procedure).

• Periodical: Solid State Phenomena (Volume 245)
• Pages: 116-120
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.245.116
• Online since: October 2015
• Authors: Vladimir S. Egorkin*, Igor E. Vyaliy, Sergey L. Sinebryukhov, Sergey V. Gnedenkov
• Keywords: Aluminium, Contact Angle, Electrochemical Impedance Spectroscopy, Hydrophobicity, Plasma Electrolytic Oxidation, Protective Coatings, Wettability

References

[1] L. Snizhko, A. Yerokhin, N. Gurevina, D. Misnyankin, A. Ciba, A. Matthews, Voltastatic studies of magnesium anodising in alkaline solutions, Surf. Coat. Technol. 205 (2010) 1527-1531.

DOI: 10.1016/j.surfcoat.2010.10.013

[2] S.V. Gnedenkov, O.A. Khrisanfova, A.G. Zavidnaya, S.L. Sinebryukhov, V.S. Egorkin et al, PEO coatings obtained on an Mg–Mn type alloy under unipolar and bipolar modes in silicate-containing electrolytes, Surf. Coat. Technol. 204 (2010) 2316-2322.

DOI: 10.1016/j.surfcoat.2009.12.024

[3] V.S. Rudnev, T.P. Yarovaya, P.M. Nedozorov, A. Yu. Ustinov, L.M. Tyrina, I.V. Malyshev, V.G. Kuryavyi, V.S. Egorkin, S.L. Sinebryukhov, S.V. Gnedenkov, Obtaining ZrO2 + CeOx + TiO2/Ti compositions by plasma electrolytic oxidation of titanium and investigating their properties / Prot. Met. Phys. Chem. Surf. 47 (2011).

DOI: 10.1134/s2070205111050145

[4] V.S. Rudnev, T.P. Yarovaya, V.S. Egorkin, S.L. Sinebryukhov, S.V. Gnedenkov, Properties of coatings formed on titanium by plasma electrolytic oxidation in a phosphate-borate electrolyte / Russ. J. Appl. Chem. 83 (2010) 664–670.

DOI: 10.1134/s1070427210040178

[5] S.V. Gnedenkov, S.L. Sinebryukhov, A.V. Puz, A.S. Gnedenkov, I.E. Vyaliy, D.V. Mashtalyar, V.S. Egorkin, Plasma electrolytic oxidation coatings formed with microsecond current pulses / Solid State Phenom. 213 (2014) 149–153.

DOI: 10.4028/www.scientific.net/ssp.213.149

[6] Y. Gao, A. Yerokhin, A. Matthews, DC plasma electrolytic oxidation of biodegradable cp-Mg: In-vitro corrosion studies / Surf. Coat. Tech. 234 (2013) 132–142.

DOI: 10.1016/j.surfcoat.2012.11.035

[7] S. Stojadinovic, R. Vasilic, J. Radic-Peric, M. Peric, Characterization of plasma electrolytic oxidation of magnesium alloy AZ31 in alkaline solution containing fluoride / Surf. Coat. Tech. 273 (2015) 1–11.

DOI: 10.1016/j.surfcoat.2015.03.032

[8] S.L. Sinebryukhov, M.V. Sidorova, V.S. Egorkin, P.M. Nedozorov, A. Yu. Ustinov, E.F. Volkova, S.V. Gnedenkov, Protective oxide coatings on Mg–Mn–Ce, Mg–Zn–Zr, Mg–Al–Zn–Mn, Mg–Zn–Zr–Y, and Mg–Zr–Nd magnesium-based alloys / Prot. Met. Phys. Chem. Surf. 48 (2012).

DOI: 10.1134/s2070205112060147

[9] M. Mohedano, E. Matykina, R. Arrabal, B. Mingo, A. Pardo. PEO of pre-anodized Al-Si alloys: Corrosion properties and influence of sealings / Appl. Surf. Sci. 346 (2015) 57–67.

DOI: 10.1016/j.apsusc.2015.03.206

[10] N.P. Wasekar, A. Jyothirmayi, G. Sundararajan, Influence of prior corrosion on the high cycle fatigue behavior of microarc oxidation coated 6061-T6 Aluminum alloy / Int. J. Fatigue. 33 (2011) 1268–1276.

DOI: 10.1016/j.ijfatigue.2011.03.016

[11] L.B. Boinovich, S.V. Gnedenkov, D.A. Alpysbaeva, V.S. Egorkin, A.M. Emelyanenko, S.L. Sinebryukhov, A.K. Zaretskaya, Anticorrosion performance of composite coatings on low-carbon steel containing highly- and superhydrophobic layers in combination with oxide sublayers / Corros. Sci. 55 (2012).

DOI: 10.1016/j.corsci.2011.10.023

[12] V. Malinovschi, A. Marin, S. Moga, D. Negrea, Preparation and characterization of anticorrosive layers deposited by micro-arc oxidation on low carbon steel / Surf. Coat. Tech. 253 (2014) 194–198.

DOI: 10.1016/j.surfcoat.2014.05.036

[13] S.V. Gnedenkov, S.L. Sinebryukhov, V.S. Egorkin, D.V. Mashtalyar, A.M. Emelyanenko, L.B. Boinovich, Electrochemical properties of the superhydrophobic coatings on metals and alloys / J. Taiwan Inst. Chem. E. 85 (2014) 3075–3080.

DOI: 10.1016/j.jtice.2014.08.025

[14] S.V. Gnedenkov, V.S. Egorkin, S.L. Sinebryukhov, I.E. Vyaliy, A.S. Pashinin, A.M. Emelyanenko, L.B. Boinovich, Formation and electrochemical properties of the superhydrophobic nanocomposite coating on Mg–Mn–Ce magnesium alloy / Surf. Coat. Tech. 232 (2013).

DOI: 10.1016/j.surfcoat.2013.05.020

[15] Q. Liu, D.X. Chen, Z.X. Kang, One-Step Electrodeposition Process To Fabricate Corrosion-Resistant Superhydrophobic Surface on Magnesium Alloy / ACS Appl. Mater. Interfaces 7 (2015) 1859–1867.

DOI: 10.1021/am507586u

[16] S.V. Gnedenkov, S.L. Sinebryukhov, V.S. Egorkin, I.E. Vyaliy, A.M. Emelyanenko, L.B. Boinovich, Protective properties of the nanocomposite coatings on Mg alloy / Solid State Phenom. 213 (2014) 176–179.

DOI: 10.4028/www.scientific.net/ssp.213.176

[17] Q. Liu, Z.X. Kang, One-Step One-step electrodeposition process to fabricate superhydrophobic surface with improved anticorrosion property on magnesium alloy / Materials Letters 137 (2014) 210–213.

DOI: 10.1016/j.matlet.2014.09.010

[18] S.V. Gnedenkov, S.L. Sinebryukhov, V.S. Egorkin, D.V. Mashtalyar, A.M. Emel'yanenko, D.A. Alpysbaeva, L.B. Boinovich, Features of the Occurrence of Electrochemical Processes in Contact of Sodium Chloride Solutions with the Surface of Superhydrophobic Coatings on Titanium / Russ. J. Electrochem+. 48 (2012).

DOI: 10.1134/s1023193512020048

[19] J.S. Liang, D. Li, D.Z. Wang, K.Y. Liu, L. Chen, Preparation of stable superhydrophobic film on stainless steel substrate by a combined approach using electrodeposition and fluorinated modification / Appl. Surf. Sci. 293 (2014) 265–270.

DOI: 10.1016/j.apsusc.2013.12.147

[20] P. Wang, D. Zhang, R. Qiu, Y. Wan, J.J. Wu, Green approach to fabrication of a super-hydrophobic film on copper and the consequent corrosion resistance / Corros. Sci. 80 (2014) 366–373.

DOI: 10.1016/j.corsci.2013.11.055

[21] J.L. Song, W.J. Xu, X. Liu, Y. Lu, Z.F. Wei, L.B. Wu, Ultrafast fabrication of rough structures required by superhydrophobic surfaces on Al substrates using an immersion method / Chem. Eng. J. 211/212 (2012) 143–152.

DOI: 10.1016/j.cej.2012.09.094