Browse > Article
http://dx.doi.org/10.5695/JKISE.2019.52.5.275

Enhanced Properties of Aluminum Oxide Layers with Post Heat Treatment  

Jeon, Yoonnam (R&D center, YKMC Inc.)
Kim, Sangjun (R&D center, YKMC Inc.)
Park, Jihyun (R&D center, YKMC Inc.)
Jeong, Nagyeom (R&D center, YKMC Inc.)
Publication Information
Journal of the Korean institute of surface engineering / v.52, no.5, 2019 , pp. 275-281 More about this Journal
Abstract
Anodization is widely used to enhance the properties of aluminum, such as hardness, electric resistance, abrasion resistance, corrosion resistance etc. But these properties can be enhanced with additional process. According to the partial crystallization of oxide layer with post heat treatment, enhanced hardness can be expected with partial crystallization. In this study, post heat treatments were applied to the anodized aluminum alloys of Al6061 to achieve the partial crystallization, and crystallizations were evaluated with the reduced breakdown voltages. Interestingly, remarkable enhanced hardness (21~29%), abrasion resistance (26~62%), and reduced breakdown voltage (24~44%) were observed for the sulfuric acid anodized samples when we annealed the anodized samples with 1hour post heat treatment at $360^{\circ}C$. For the Al5052 alloys, a lot of cracks were observed when we applied the post heat treatment.
Keywords
Aluminum; Sulfuric acid anodizing; heat treatment;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 S. Wernick, R. Pinner, and P. G. Sheasby, The surface Treatment and Finishing of Aluminum and its Alloys, 5th Ed., Finishing Publications Ltd., (1987).
2 정용수, 박영희, 장관섭, 문성모, 최진섭, 정윤미, 실용표면처리기술시리즈 제5권 양극산화, 화신문화(주), (2014).
3 Y. Tak, J. Kang, and J. Choi, Electrochemical Properties of Metal Aluminum and Its Application, J. Korean Ind. Eng. Chem. 17 (2006) 335-342.
4 C. Park, S. Moon, I. Cheong, and D. Yun, Effect of AC Current Density on the PEO Film Formation of Al6061 Alloy, J. Korean Inst. Surf. Eng. 52 (2019) 138-144.   DOI
5 M. Ardelean, S. Lascau, E. Ardelean, and A. Josan, Surface treatments for aluminum alloys, IOP Conf. Series: Mater. Sci. Eng. 294 (2018) 012042.   DOI
6 J. Lee, Y. Kim, H. Jang, U. Jung, and W. Chung, $Cr_2O_3$ Sealing of Anodized Aluminum Alloy by Heat Treatment, Procedia Eng. 10 (2011) 2803-2808.   DOI
7 S. Y. Kang, and D. W. Lee, Study on Improvement of Mechanical Properties after Heat Treatment of Hard Chromium Electrodeposits with Additives, J. Kor. Inst. Surf. Eng. 47 (2014) 116-120.   DOI
8 G. D. Sulka, Highly Ordered Anodic Porous Alumina Formation by Self-Organized Anodizing, Nanostruct. Mat. Electrochem. 1 (2008) 1-116.
9 J. Miao, R. Wu, K. Hao, Q. Chen, and X. Dong, Effects of alloying elements on structure of plasma electrolytic oxidation ceramic coatings on aluminum alloys, Appl. Mechanics Mater. 310 (2013) 85-89.   DOI
10 J. Chang, C. Lin, C. Liao, C. Chen, and W. Tsai, Effect of Heat-Treatment on Characteristics of Anodized Aluminum Oxide Formed in Ammonium Adipate Solution, J. Electrochem. Soc. 151 (2004) B188-B194.   DOI
11 Y. Goueffon, L. Arurault, C. Mabru, C. Tonon, and P. Guigue, Black anodic coatings for space applications: study of the process parameters characteristics and mechanical properties, J. Mat. Processing Tech. 209 (2009) 5145-5151.   DOI
12 V. Dehnavi, B. L. Luan, X. Y. Liu, D. W. Shoesmith, and S. Rohani, Correlation between plasma electrolytic oxidation treatment stages and coating microstructure on aluminum under unipolar pulsed DC mode, Surf. Coatings Tech. 269 (2015) 91-99.   DOI
13 D. Fang, Z. Luo, K. Huang, and D. C. Lagoudas, Effect of heat treatment on morphology, crystalline structure and photocatalysis properties of $TiO_2$ nanotubes on Ti substrate and freestanding membrane, Appl. Surf. Sci. 257 (2011) 6451-6461.   DOI
14 B. Sathyaseelan, I. Baskaran, and K. Sivakumar, Phase Transition Behavior of Nanocrystalline $Al_2O_3$ Powders, Soft Nanosci. Lett. 3 (2013) 69-74.   DOI