플라즈마 전해 산화처리한 시효경화 Mg-Al 합금 피막의 기계적 및 전기화학적 특성

장시영; 김예림; 김양도; Si Young Chang; Ye-Lim Kim; Yang Do Kim

Korean Journal of Materials Research, Vol.17, No.12, 648-653, December, 2007

DOI10.3740/MRSK.2007.17.12.648 Export Citation

플라즈마 전해 산화처리한 시효경화 Mg-Al 합금 피막의 기계적 및 전기화학적 특성

Mechanical and Electrochemical Properties of Plasma Electrolytic Oxide Coatings on Aged Mg-Al alloy

장시영 ^†, 김예림¹, 김양도 ²

한국항공대학교 항공재료공학과
¹한국항공대학교 대학원
²부산대학교 신소재공학부

Si Young Chang^†, Ye-Lim Kim¹, and Yang Do Kim²

Department of Materials Engineering, Korea Aerospace University, Gyeonggi-do 412-791, Korea
¹Graduate Student, Korea Aerospace University, Gyeonggi-do 412-791, Korea
²School of Materials Science and Engineering, Pusan National University, Busan, 609-735, Korea

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Plasma electrolytic oxidation (PEO) treatment was performed on cast Mg-6 wt%Al alloy solutiontreated at 693K for 16h and aged at 498K. The surface roughness, thickness, micro-hardness, wear and corrosion properties of coatings on solution-treated and aged Mg-6 wt%Al alloy were investigated. The coatings on aged Mg-6 wt%Al alloy had thinner layer and lower micro-hardness and wear resistance than the solutiontreated Mg-6 wt%Al alloy. As the aging time increased, the thickness of coatings decreased while the surface roughness was almost no changed. In addition, the micro-hardness and wear property of coatings decreased with increasing the aging time unlike the uncoated Mg-6 wt%Al alloy showing the peak micro-hardness and the best wear property after aging for 16 h. However, the coatings on Mg-6 wt%Al alloy peak-aged for 16h revealed the best corrosion resistance in 3.5% NaCl solution, which was explained based on the microstructural characteristics.

Keywords:Plasma electrolytic oxidation;Mg-Al alloy;Roughness;Thickness;Micro-hardness;Weight loss;Corrosion property

[References]

Kojima Y, Komado S, Mater. Sci. Forum, 488, 9 (2005)
Yue TM, Hu QW, Wei Z, Man HC, Mater. Lett., 47, 165 (2001)
Yerokhin AL, Nie X, Leyland A, Matthews A, Dowey SJ, Surf. Coat. Tech., 122, 73 (1999)
Yerokhin AL, Nie X, Leyland A, Matthews A, Surf. Coat. Tech., 130, 195 (2000)
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Yu BG, Kim Y, Kang KM, Chang SY, Mater. Sci. Forum, 510-511, 298 (2006)
Chang SY, Kim YL, Song BH, Lee JH, Solid State Phenom., 124-126, 767 (2007)
Song BH, Kim YL, Chang SY, Solid State Phenom., 124-126, 763 (2007)
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Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p.144, Kallos Publishing Co., Tokyo, (2000). (2000)
Liang J, Guo BG, Tian J, Liu HW, Zhou JF, Xu T, Appl. Surf. Sci., 252(2), 345 (2005)
Guo H, An M, Xu S, Huo H, Mater. Lett., 60, 1598 (2006)
Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p.343, Kallos Publishing Co., Tokyo, (2000). (2000)
Ghali E, Uhlig’s Corrosion Handbook, 2nd ed., John Wiley and Sons, Inc., NewYork, (2000). (2000)

[Related Articles]

[1] Kojima Y, Komado S, Mater. Sci. Forum, 488, 9 (2005)

[2] Yue TM, Hu QW, Wei Z, Man HC, Mater. Lett., 47, 165 (2001)

[3] Yerokhin AL, Nie X, Leyland A, Matthews A, Dowey SJ, Surf. Coat. Tech., 122, 73 (1999)

[4] Yerokhin AL, Nie X, Leyland A, Matthews A, Surf. Coat. Tech., 130, 195 (2000)

[5] Yu BG, Kim YL, Lee KS, Chang SY, in Proceedings of 1st Asian Symposium on Magnesium alloys. (Jeju, Oct. 2005) p. 321. (2005)

[6] Yu BG, Kim Y, Kang KM, Chang SY, Mater. Sci. Forum, 510-511, 298 (2006)

[7] Chang SY, Kim YL, Song BH, Lee JH, Solid State Phenom., 124-126, 767 (2007)

[8] Song BH, Kim YL, Chang SY, Solid State Phenom., 124-126, 763 (2007)

[9] Sakkinen DJ, SAE Technical Paper Series, 940779.

[10] Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p.144, Kallos Publishing Co., Tokyo, (2000). (2000)

[11] Liang J, Guo BG, Tian J, Liu HW, Zhou JF, Xu T, Appl. Surf. Sci., 252(2), 345 (2005)

[12] Guo H, An M, Xu S, Huo H, Mater. Lett., 60, 1598 (2006)

[13] Japan Inst. of Magnesium, Handbook of Advanced Magnesium Technology, p.343, Kallos Publishing Co., Tokyo, (2000). (2000)

[14] Ghali E, Uhlig’s Corrosion Handbook, 2nd ed., John Wiley and Sons, Inc., NewYork, (2000). (2000)