Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 26    No. 2    February 2016

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Influence of adipic acid on anodic film formation and corrosion resistance of 2024 aluminum alloy
Ying-dong LI1,2, You ZHANG1, Song-mei LI1, Pi-zhi ZHAO2

1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;
2. Chinalco Research Institute of Science and Technology Co., Ltd., Beijing 102209, China

Abstract:The influence of adipic acid on the formation and corrosion resistance of anodic oxide film fabricated on 2024 aluminum alloy was investigated. The morphology was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The corrosion resistance was evaluated by electrochemical impedance spectroscopy (EIS). The results showed that the adipic acid was absorbed at the electrolyte/anodic layer interface during anodizing. The corrosion rate of anodic film decreased and the film thickness increased. The film was uniform and compact especially at the film/substrate interface. After sealing procedure, anodic film formed with the addition of adipic acid exhibited improved dielectric property and corrosion resistance in aggressive environment.


Key words: aluminum alloy; anodic oxidation; adipic acid; adsorption; corrosion

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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