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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 2, 2005
Accepted July 18, 2006

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Evaluation of the characteristics using slow strain rate tests of 5456 Al-Mg alloy for ship construction

Seong-Jong Kim^† Jae-Yong Ko Min-Su Han

Mokpo Maritime University, Chukkyo-dong, Mokpo City, Cheonnam 530-729, Korea

ksj@mmu.ac.kr

Korean Journal of Chemical Engineering, November 2006, 23(6), 1028-1033(6), 10.1007/s11814-006-0025-z

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Abstract

Recently, there has been increased interest in using aluminum alloys in ship construction instead of fiberreinforced plastic (FRP). Aluminum alloy ships are faster, have a greater load capacity, and are easier to recycle than FRP ships. We investigated the mechanical and electrochemical properties of aluminum alloys using slow strain rate and potentiostatic tests under various potential conditions. Aluminum and aluminum alloys do not corrode due to the formation of an anti-corrosive passive film, such as Al2O3 or Al2O3·3H2O, which resists corrosion in neutral solutions. In seawater, however, Cl. ions destroy this passive film. The optimum protection potential range with regards to hydrogen embrittlement and stress corrosion cracking was determined to lie between .1.5 and .0.7 V (SSCE). These results can be used as reference data for ship design.

Keywords

Aluminum Alloys Fiber-Reinforced Plastic (FRP) Electrochemical Property Hydrogen Embrittlement Stress Corrosion Cracking

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