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Effects of NaOH Concentration on the Structure of PEO Films Formed on AZ31 Mg Alloy in PO43- and SiO32- Containing Aqueous Solution
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 Title & Authors
Effects of NaOH Concentration on the Structure of PEO Films Formed on AZ31 Mg Alloy in PO43- and SiO32- Containing Aqueous Solution
Kwon, Duyoung; Moon, Sungmo;
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The structure of plasma electrolytic oxidation (PEO) coatings was investigated as a function of NaOH concentration in 0.06 M + 0.06 M solution by using SEM and epoxy replica method. The PEO film was formed on AZ31 Mg alloy by the application of anodic pulse current with 0.2 ms width and its formation behavior was studied by voltage-time curves during the formation of PEO films. It was found that the addition of NaOH into and containing aqueous solution causes a decrease in the PEO film formation voltage, suggesting that dielectric breakdown of the PEO becomes easier with increasing ion concentration in the solution. With increasing ion concentration, thickness of the PEO film increased and surface roughness decreased. The size of pores formed in the PEO layer became smaller and the number of cracks in the PEO layer increased with increasing ion concentration. Based on the experimental results obtained in the work, it is suggested that ions in the solution can contribute not only to the dielectric breakdown but also to the formation of PEO films in the presence of and ions in the solution.
Mg alloy;Plasma electrolytic oxidation;Pore;Coating;
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G. Song, and A. Atrens, Corrosion mechanisms of magnesium alloys, Advanced Engineering Materials., 1(1999) 11-33. crossref(new window)

G. Makar, and J. Kruger, Corrosion of magnesium, International Materials Reviews., 38(1993), 138-153. crossref(new window)

H. Hu, X. Nie and Y. Ma, Corrosion and surface treatment of magnesium alloys, Magnesium Alloys-Properties in Solid and Liquid States, In-Tech, Croatia., (2014)67.

J. D. Shim, J. Y. Byun, R&D Trend on Surface Treatment of Magnesium Alloys, Korean Journal of Materials Research., 23(2013) 72. crossref(new window)

C. Blawert, W. Dietzel, E. Ghali, G Song, Anodizing treatments for magnesium alloys and their effect on corrosion resistance in various environments, Advanced Engineering Materials., 8(2006) 511. crossref(new window)

A. L. Yerokhin, X. Nie, A. Leyland, A. Matthews, and S. J. Dowey, Plasma electrolysis for surface engineering, Surface and Coatings Technology., 122(1999) 73. crossref(new window)

S. Moon, C. N. Yang, and S. J. Na, Formation Behavior of Anodic Oxide Films on Al7075 Alloy in Sulfuric Acid Solution, Journal of The Korea Institute of Surface Engineering., 47(2014) 147. crossref(new window)

S. L. Aktug, S. Durdu, I Kutbay, and M Usta, Effect of Na 2 SiO 3.5H 2 O concentration on microstructure and mechanical properties of plasma electrolytic oxide coatings on AZ31 Mg alloy produced by twin roll casting, Ceramics International., 42(2016), 1246. crossref(new window)

H. Duan, C. Yan, and F. Wang, Effect of electrolyte additives on performance of plasma electrolytic oxidation films formed on magnesium alloy AZ91D, Electrochimica Acta., 52(2007), 3785-3793. crossref(new window)

R. Arrabal, E. Matykina, F. Viejo, P. Skeldon, and G. E. Thompson, Corrosion resistance of WE43 and AZ91D magnesium alloys with phosphate PEO coatings, Corrosion Science., 50(2008), 1744-1752. crossref(new window)

J. Liang, P. B. Srinivasan, C. Blawert, M, Stormer, and W. Dietzel, Electrochemical corrosion behaviour of plasma electrolytic oxidation coatings on AM50 magnesium alloy formed in silicate and phosphate based electrolytes, Electrochimica Acta., 54(2009), 3842-3850. crossref(new window)

S. Yagi, A. Sengoku, K. Kubota, and E. Matsubara, Surface modification of ACM522 magnesium alloy by plasma electrolytic oxidation in phosphate electrolyte, Corrosion Science., 57(2012), 74-80. crossref(new window)

Stojadinovic, Stevan, et al., Characterization of plasma electrolytic oxidation of magnesium alloy AZ31 in alkaline solution containing fluoride, Surface and Coatings Technology, 273(2015) 1-11. crossref(new window)

S. Moon, Corrosion behavior of PEO-treated AZ31 Mg alloy in chloride solution, Journal of Solid State Electrochemistry., 18(2014) 341-346. crossref(new window)

J. Liang, B. Guo, J. Tian, H. Liu, J. Zhou, and T. Xu, Effect of potassium fluoride in electrolytic solution on the structure and properties of microarc oxidation coatings on magnesium alloy, Applied Surface Science., 252(2005) 345-351. crossref(new window)

B. Kazanski, A. Kossenko, M. Zinigrad, and A. Lugovskoy, Fluoride ions as modifiers of the oxide layer produced by plasma electrolytic oxidation on AZ91D magnesium alloy, Applied Surface Science., 287(2013) 461-466. crossref(new window)

J Liang, L Hu, and J Hao, Preparation and characterization of oxide films containing crystalline $TiO_2$ on magnesium alloy by plasma electrolytic oxidation, Electrochimica acta., 52 (2007) 4836-4840. crossref(new window)

M. Mohedano, C. Blawert, and M. L. Zheludkevich, Silicate-based Plasma Electrolytic Oxidation (PEO) coatings with incorporated CeO 2 particles on AM50 magnesium alloy, Materials & Design., 86(2015) 735-744. crossref(new window)

X. Lu, C Blawert, Y. Huang, H Ovri, M. L. Zheludkevich, and K. U. Kainer, Plasma electrolytic oxidation coatings on Mg alloy with addition of SiO 2 particles, Electrochimica Acta., 187(2016), 20-33. crossref(new window)

X. Lu, C. Blawert, M. L. Zheludkevich, and K. U. Kainer, Insights into plasma electrolytic oxidation treatment with particle addition, Corrosion Science., 101(2015) 201-207. crossref(new window)

S. Moon, A Blade-Abrading Method for Surface Pretreatment of Mg Alloys, Journal of The Korea Institute of Surface Engineering., 48(2015), 194-198. crossref(new window)

S. Moon, R. Arrabal, and E. Matykina, 3-Dimensional structures of open-pores in PEO films on AZ31 Mg alloy, Materials Letters., 161(2016) 439-441.

S. Moon, Y. Nam, Anodic oxidation of Mg-Sn alloys in alkaline solutions, Corrosion Science., 65(2012) 494-501. crossref(new window)