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Characteristic Evaluation of Anodic Film Depending on the Concentration of Sodium Silicate in the Electrolyte Anodized AZ31B Magnesium Alloy
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 Title & Authors
Characteristic Evaluation of Anodic Film Depending on the Concentration of Sodium Silicate in the Electrolyte Anodized AZ31B Magnesium Alloy
Lee, Dong-Kil; Kim, Yong-Hwan; Park, Hyun; Jung, Uoo-Chang; Chung, Won-Sub;
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Magnesium is one of the lightest metals, and magnesium alloys have excellent physical and mechanical properties such as high stiffness/weight ratios, good castability, good vibration and shock absorption. However their poor corrosion resistance, wear resistance, hardness and so on, have limited their application. To improve these defects, many techniques are developed. Micro arc oxidation(MAO) is a one of the surface treatments under anodic oxidation in which ceramic coating is directly formed on the surface of magnesium alloy. In this study, the characteristics of anodic film were examined after coating the AZ31B magnesium alloy through the MAO process. MAO was carried out in potassium hydroxide, potassium fluoride, and various concentration of sodium silicate in electrolyte. The morphology and chemical composition of the coating layer were characterized by SEM, XRD, EPMA and EDS. The hardness of anodic films was measured by micro-vickers hardness tester. As a result, the morphology and composition of anodic film were changed by concentration of sodium silicate. Thickness and Si composition of anodic film was increased with increasing concentration of sodium silicate in electrolyte. The hardness of anodic film was highly increased when the concentration of sodium silicate was above 40 g/l in electrolyte.
AZ31B Mg alloy;Anodizing;Anodic film;Sodium silicate;Hardness;
 Cited by
A Blade-Abrading Method for Surface Pretreatment of Mg Alloys, Journal of the Korean institute of surface engineering, 2015, 48, 5, 194  crossref(new windwow)
D. L. Albright, J. O. Haagensen, Life Cycle Inventory of Magnesium, 54th Annual World Magnesium Conference, 1997

H. Tateishi, M. Inoue, Y. Kojima, Japan Inst. Light Metals, 48 (1998) 19 crossref(new window)

S. Ono, K. Asami, T. Osaka, N. Masuko, Electrochem. Soc., 143 (1996) 62 crossref(new window)

A. K. Sharma, Met. Finish., 91 (1993) 57

O. Khaselev, D. Weiss, J. Yahalom, Electrochem. Soc., 146 (1999) 1757 crossref(new window)

H.-I. Wu, Y.-L. Cheng, L.-L. Li, Z.-H. Chen, H.-M. Wang, Z. Zhang, Surf. Sci., 253 (2007) 9387 crossref(new window)

P. Bala Srinivasan, C. Blawert, W. Dietzel, Mater. Sci. Eng., A, 494 (2008) 401 crossref(new window)

Liyuan Chai, Xia Yu, Zhihui Yang, Yunyan Wang, Masazumi Okido, Corrosion Science, 50 (2008) 3274 crossref(new window)

H. Duan, C. Yan, F. Wang, Electrochim. Acta, 52 (2007) 5002 crossref(new window)

D. Duly, Y. Brechet, Actametal. Mater, 42 (1994) 3035

D. Duly, J.P. Simon, Y. Brechet, Actametal. Mater, 43 (1995) 101

C. B. Wei, X. B. Tian, S. Q. Yang, X. B. Wang, R. K. Y. Fu, P. K. Chu, Surface & Coatings Tech., 201 (2007) 5021 crossref(new window)

C. Blawert, W. Dietzel, E. Ghali, G. Song, Adv. Eng. Mater., 8 (2006) 511 crossref(new window)

V. I. Belevantsev, O. P. Terleeva, G. A. Markov, E. K. Shulepko, A. I. Slonova, V. V. Utkin, Prot. Met., 34 (1998) 469

V. Brass, S. Xia, R. Yue, G. Richard, Rateick Jr., J. Electrochem. Soc., 151 (2004) B1 crossref(new window)

H. F. Guo, M. Z. An, H. B. Huo, S. Xu, L. J. Wu, Appl. Surf. Sci., 252 (2006) 7911 crossref(new window)