Manufacturing Technology 2022, 22(5):598-604 | DOI: 10.21062/mft.2022.073

The Influence of Fe Content on Corrosion Resistance of secondary AlSi7Mg0.3 Cast Alloy with Increased Fe-content

Zuzana ©urdová ORCID..., Lenka Kuchariková ORCID..., Eva Tillová ORCID..., Lucia Pastierovičová ORCID..., Mária Chalupová ORCID..., Milan Uhríčik ORCID..., Martin Mikolajčík ORCID...
Faculty of Mechanical Engineering, Department of Materials Engineering, University of ®ilina, Univerzitná 8215/1, 010 26 ®ilina. Slovakia

Production of primary aluminium is energetically enormously expensive. The use of secondary (recycled) aluminium, has therefore a high potential to save money and energy while reducing the negative environmental impact of aluminium production. Although the properties of secondary aluminium alloys are generally comparable to those of primary aluminium alloys, the increased Fe content can lead to a significant reduction in the corrosion resistance of these alloys. Secondary (recycled) AlSi7Mg0.3 cast alloy with different iron contents (0.123, 0.454, 0.679 and 1.209 wt. %) in the as-cast and after heat treatment (T6) condition was investigated. The quantitative analysis was focused on the evaluation of the Fe-phases, especially the needle-like Al5FeSi phase. The corrosion resistance was measured by a rapid corrosion test (AUDI test). The corrosion damage of the surface was observed macroscopically. The results show that Fe content higher than 0.454 % has no significant effect on the amount and size of needle-like phases of Al5FeSi. The corrosion resistance is mainly influenced by the size and length of the Al5FeSi phases. Increased Fe content decreases the corrosion resistance of AlSi7Mg0.3 alloy and accelerates the initiation of corrosion.

Keywords: AlSi7Mg0.3 cast alloy, Fe-phase, Corrosion resistance, AUDI test
Grants and funding:

The research was supported by Scientific Grand Agency of Ministry of Education of Slovak Republic and Slovak Academy of Sciences, VEGA 01/0398/19, KEGA 016®U-4/2020, project to support young researchers at UNIZA, ID project 12715 (Kuchariková) and project 313011ASY4 “Strategic implementation of additive technologies to strengthen the intervention capacities of emergencies caused by the COVID-19 pandemic

Received: August 30, 2022; Revised: October 11, 2022; Accepted: December 6, 2022; Prepublished online: December 7, 2022; Published: December 11, 2022  Show citation

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©urdová Z, Kuchariková L, Tillová E, Pastierovičová L, Chalupová M, Uhríčik M, Mikolajčík M. The Influence of Fe Content on Corrosion Resistance of secondary AlSi7Mg0.3 Cast Alloy with Increased Fe-content. Manufacturing Technology. 2022;22(5):598-604. doi: 10.21062/mft.2022.073.
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