Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of the Mixed Electrolyte on the Film Growth and Corrosion Characteristics of Anodized Al 6061 Alloy

Al 6061 합금 양극산화피막의 성장과 부식특성에 미치는 혼합 전해용액의 영향

  • Ryu, Han-Woong (School of Materials Science and Engineering, Pusan National University) ;
  • Kim, Yong-Hwan (School of Materials Science and Engineering, Pusan National University) ;
  • Chung, Uoo-Chang (Digital Manufacturing Technology Innovation Center, KITECH) ;
  • Chung, Won-Sub (School of Materials Science and Engineering, Pusan National University)
  • 류한웅 (부산대학교 재료공학부) ;
  • 김용환 (부산대학교 재료공학부) ;
  • 정우창 (한국생산기술연구원 디지털 생산기술 혁신센터) ;
  • 정원섭 (부산대학교 재료공학부)
  • Published : 2007.05.27
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Abstract

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.

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References

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