In-depth Characterization of “Eco-Friendly” EN AW 6026 LF Aluminium Alloy, with Intentionally Reduced Content of Pb and Sn, in Application for Direct Contact with Foods

Sinagra Ciro*, Bravaccino Francesco, Di Betta Giorgio, Cazzago Gianfranco, Cusan Claudia, Sguazzin Alessia, Greco Vincenza and Bellucci Francesco

In order to enhance the mechanical processing of aluminium alloys, the utilisation of aluminium alloys containing lead (Pb) and tin (Sn) has been adopted in many industrial applications. In order to improve the environmental impact and to open up further additional markets, a new aluminium alloy, EN AW 6026LF, has been developed by substituting Pb and Sn with Bi, which has been added as an alloying agent at a level of approximately 1%. Consequently, this study aims to provide a comprehensive evaluation of the potential of EN AW 6026LF for utilisation in food machinery and packaging applications. The experimental analyses conducted include microstructural characterisation, corrosion resistance on the bare and anodised alloy, and Bi migration tests in various aqueous simulants. The toxicity evaluations have shown that the release of Bi remains within safe limits under various conditions, which should ensure consumer safety. This comprehensive assessment underscores the versatility, sustainability, and regulatory compliance of EN AW 6026LF, which could be considered a viable alternative to traditional lead-containing alloys in environmentally sensitive and direct food contact applications. 

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Published on: Feb 1, 2025 Pages: 1-8

Full Text PDF Full Text HTML DOI: 10.17352/atte.000020
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