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Simultaneous Improvement of Mechanical and Corrosion Properties of Aluminum Alloys

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Light Metals 2016

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Abstract

The use of Al-alloys is limited in many applications due to a dramatic deterioration of the corrosion properties with any effort made to increase the strength. The hardening phases, uniformly distributed fine intermetallics, act as electrochemical heterogeneities and promote galvanic interactions, thus causing localized corrosion. The chemical composition, size, number, and distribution of the intermetallics in the matrix govern the corrosion of Al alloys. Refining the size and doping of intermetallics via microalloying have been found effective in improving corrosion resistance of Al alloys. This paper presents an overview of recent research on: 1) understanding the influence of intermetallics on corrosion of Al alloys and methods to optimize corrosion and mechanical properties by controlling intermetallic formation via advanced production and post-production processing techniques, and 2) development of ultra-high strength and corrosion resistant Al alloys by combining suitable alloying additions and alloy production techniques.

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Authors and Affiliations

  1. Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH, 44325, USA

    J. Esquivel & R. K. Gupta

  2. National Center for Education and Research on Corrosion and Material Performance, The University of Akron, Akron, OH, 44325, USA

    J. Esquivel

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  1. Alcoa Technical Center, USA

    Edward Williams (Division Manager of Casting Technology) (Division Manager of Casting Technology)

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Esquivel, J., Gupta, R.K. (2016). Simultaneous Improvement of Mechanical and Corrosion Properties of Aluminum Alloys. In: Williams, E. (eds) Light Metals 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48251-4_26

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