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Advances in Materials Science and Engineering
Volume 2015, Article ID 163205, 17 pages
http://dx.doi.org/10.1155/2015/163205
Research Article

Atmospheric Corrosion Behavior of 2A12 Aluminum Alloy in a Tropical Marine Environment

1Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
2Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
3Pipeline Research Institute of China National Petroleum Corporation, Langfang 065000, China

Received 2 March 2015; Accepted 31 May 2015

Academic Editor: Somchai Thongtem

Copyright © 2015 Zhongyu Cui et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Atmospheric corrosion behavior of 2A12 aluminum alloy exposed to a tropical marine environment for 4 years was investigated. Weight loss of 2A12 alloy in the log-log coordinates can be well fitted with two linear segments, attributing to the evolution of the corrosion products. EIS results indicate that the corrosion product layer formed on the specimens exposed for 12 months or longer presents a good barrier effect. Corrosion morphology changes from pitting corrosion to severe intergranular corrosion with the extension of exposure time, resulting in the reduction of the mechanical properties.