Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Growth Behavior and Corrosion Damage of Oxide Film According to Anodizing Time of Aluminum 1050 Alloy

알루미늄 1050 합금의 양극산화 시간에 따른 산화피막 성장 거동 및 부식 손상 연구

  • Choi, Yeji (Department of Advanced Materials Engineering, Dong-eui University) ;
  • Jeong, Chanyoung (Department of Advanced Materials Engineering, Dong-eui University)
  • 최예지 (동의대학교신소재공학과) ;
  • 정찬영 (동의대학교신소재공학과)
  • Received : 2022.07.04
  • Accepted : 2022.07.18
  • Published : 2022.09.02
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Abstract

Aluminum 1000 series alloy, a pure aluminum with excellent workability and weldability, is mainly used in the ship field. Aluminum alloy can combine with oxygen in the atmosphere and form a natural oxide film with high corrosion resistance. However, its corrosion resistance and durability are decreased when it is exposed to a harsh environment for a long period of time. For solving this problem, a porous oxide film can be formed on the surface using an anodizing treatment method, a typical surface technique among various methods. In this study, aluminum 1050 alloy was anodized for 2 minutes, 6 minutes, and 10 minutes. The structure and shape of the oxide film were then analyzed to determine the corrosion resistance according to the thickness of the oxide film that changed depending on working condition using 15 wt% NaCl. After it was immersed in NaCl solution for 1, 5, and 10 days, corrosion damage was observed. Results confirmed that the thickness of the oxide film increased as the anodization time became longer. The depth of surface damage due to corrosion became deeper when the film was immersed in the 15 wt% NaCl solution for a longer period of time.

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