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http://dx.doi.org/10.5695/JKISE.2020.53.6.322

Corrosion Characteristics of Aluminum Die Casting Alloys with Different Scrap Charge Rate  

Kim, Jun-Ho (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University)
Lee, Seung-Hyo (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of the Korean institute of surface engineering / v.53, no.6, 2020 , pp. 322-329 More about this Journal
Abstract
The utilization of aluminum scrap is a subject of great importance in terms of reducing energy consumption and environmental protection. However, aluminum scrap contains impurities, which can degrade the properties of aluminum alloy, especially corrosion resistance. This study examines the effect of scrap charge rate of aluminum alloys about microstructures and corrosion characteristics. According to the metallographic examinations, Mg2Si tended to become coarser and its uniformity was decreased by increasing aluminum scrap charge rate. The immersion test exhibited corrosion progressed through the eutectic areas due to micro-galvanic interactions. Electrochemical measurements revealed that excess aluminum scrap could reduce the intergranular corrosion resistance of aluminum alloys. Results showed that the scrap charge rate is important factor in the design of corrosion resistance of aluminum die casting alloys.
Keywords
Al Die Casting alloys; Aluminum Scrap; Microstructure; Corrosion Resistance; Micro-galvanic Interaction; Intergranular Corrosion;
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Times Cited By KSCI : 1  (Citation Analysis)
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