Al 6061 합금 양극산화피막의 성장과 부식특성에 미치는 혼합 전해용액의 영향

류한웅; 김용환; 정우창; 정원섭; Han-Woong Ryu; Yong-Hwan Kim; Uoo-Chang Chung; Won-Sub Chung

Korean Journal of Materials Research, Vol.17, No.5, 244-249, May, 2007

DOI10.3740/MRSK.2007.17.5.244 Export Citation

Al 6061 합금 양극산화피막의 성장과 부식특성에 미치는 혼합 전해용액의 영향

Effect of the Mixed Electrolyte on the Film Growth and Corrosion Characteristics of Anodized Al 6061 Alloy

류한웅, 김용환, 정우창¹, 정원섭^†

부산대학교 재료공학부
¹한국생산기술연구원 디지털 생산기술 혁신센터

Han-Woong Ryu, Yong-Hwan Kim, Uoo-Chang Chung¹, and Won-Sub Chung^†

School of Materials Science and Engineering, Pusan National University, Busan, 609-735, Korea
¹Digital Manufacturing Technology Innovation Center, KITECH, Busan, 609-735, Korea

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The properties of anodized films on aluminum 6061 alloy in single electrolyte of sulfuric acid and mixed electrolyte of sulfuric-boric acid and sulfuric-boric-nitric acid have been studied. Polarization tests in NaC solution were used to investigate the corrosion performance. Characteristics of film formation and surface morphology were examined by optical microscopy, FE-SEM and EDS. The results obtained have indicated that oxide films growth have been promoted by nitric acid and anodized films in mixed electrolyte have superior corrosion resistance. In case of anodic films formed in mixed electrolyte, some grooves and numerous crazings were also observed at the surface.

Keywords:Anodic oxidation;Electrolyte;Corrosion;Film formation;Polarization

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[1] Davies JA, Dorncij B, Pringle JPS, Brown F, J. Electrochem. Soc., 112, 675 (1965)

[2] Keller F, Hunter MS, Robinson DI, J. Electrochem. Sci., 100, 411 (1953)

[3] Franklin RW, Stirland DI, 10.1149/1.2425726, 110, 262( 1963) (1963)

[4] Murphy OJ, Wainright JS, Lenczwski JJ, Gibson JH, Santana MW, J. Electrochem. Sci., 136, 3518 (1989)

[5] Thompson GE, Shimizu K, Wood GC, Nature, 286, 471 (1980)

[6] Thompson GE, Wood GC, Anodic Films on Aluminium, 23, Academic Press, London (1983) (1983)

[7] Young L, Anodic Oxide Films, 163, Academic Press. New York (1961) (1961)

[8] Cohen SM, Corrosion, 51, 71 (1995)

[9] Thompson GE et al., Corros. Sci. Sect., 55, 1052 (1999)

[10] Dominques L, Fernades JCS, Corros. Sci., 45, 149 (2003)

[11] Yakovleva NM, Anicai L, Yakovlev AN, Dima L, Khanina EY, Buda M, Chupakhina EA, Thin Solid Films, 416(1-2), 16 (2002)

[12] Matthes B, Brozcit E, Arornaa J, Ronkainen H, Hannula SP, Leyland A, Matthews A, Surf. Coal. Technol.,, 49, 489 (1991)

[13] Yu YJ, Kim JG, Cho SH, Boo JH, Surf. Coat. Technol., 162, 161 (2003)

[14] Weertman J, Weertaman JR, Elementary Dislocation Theory, Macmilian, New Yock (1964) (1964)