Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Effects of Heat Treatment on Surface Properties of Aluminum 6061 Alloy After Anodization

알루미늄 6061 합금 양극산화 후 열처리에 따른 표면 특성 관찰

  • Seungmin, Lee (Department of Advanced Materials Engineering, Dong-eui University) ;
  • Chanyoung, Jeong (Department of Advanced Materials Engineering, Dong-eui University)
  • 이승민 (동의대학교 금속소재공학과) ;
  • 정찬영 (동의대학교 금속소재공학과)
  • Received : 2022.11.03
  • Accepted : 2022.11.19
  • Published : 2022.12.30
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Abstract

Anodization is a representative electrochemical surface treatment method that can improve both heat resistance and corrosion resistance by forming an anodization film on the surface of the aluminum. However, these properties can be changed after an additional heat treatment process. In this study, Al 6061 was subjected to an anodization process at 60 V for 1 hour, 5 hours, or 9 hours. An additional heat treatment process was performed at 500 ℃ for 30 minutes. Field emission scanning electron microscopy (FE-SEM) analysis revealed that the thickness of the anodized film was increased in proportion to the anodization time. Both pore size and pore diameter of the anodized film was also increased after anodization. After an additional heat treatment process, there were no significant changes in the thickness, pore size, or pore diameter of the anodized film. Heat resistance was confirmed through thermal analysis and chemical resistance was evaluated with a potentiodynamic polarization test.

Keywords

Acknowledgement

이 논문은 2022년도 밀양시와 한국재료연구원의 지원 받아 연구되었음(PICO240).

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