Effect of Additives on Corrosion Resistance of Recycled Aluminum

YUAN Shengbo; ZHOU Fan; JIANG Jiajun; HUANG Run; GU Wei; JIN Huixin

doi:10.3969/j.issn.1674-6457.2026.06.012

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (6) : 123-134. DOI: 10.3969/j.issn.1674-6457.2026.06.012

Light Alloy Forming

Effect of Additives on Corrosion Resistance of Recycled Aluminum

YUAN Shengbo¹, ZHOU Fan¹, JIANG Jiajun², HUANG Run², GU Wei², JIN Huixin^2,*

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Abstract

The work aims to enhance the corrosion resistance of recycled aluminum alloys to address the corrosion they encounter in applications in the automotive, construction and other fields, and to expand the high-performance applications of recycled aluminum. In this study, recycled aluminum alloys were refined by adding 0.5wt.% fluxing agent, 0.6wt.% Al-B master alloy, and their combination. The effects of these additives on the electrochemical corrosion behavior and immersion corrosion characteristics were systematically investigated by smelting treatment. Key electrochemical parameters, including corrosion potential, corrosion current density, and charge transfer resistance, were evaluated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), hydrogen evolution, and mass loss measurements. Results showed that the recycled aluminum alloys with additive adding showed significant improvements in corrosion potential, current density, charge transfer resistance and other aspects. The corrosion potential increased to -0.480 V, the corrosion current density decreased to 3.698 mA/cm², and the charge transfer resistance increased to 16.8 Ω·cm². Meanwhile, the hydrogen evolution rate and weight loss rate were reduced to 0.501 mL/(cm²·h) and 361.92 μg/(cm²·h), respectively, outperforming both the single-additive and raw material groups. Surface morphology analysis revealed that samples with additive adding exhibited smaller and fewer corrosion pits, indicating significantly enhanced corrosion resistance. This study provides a promising strategy and theoretical basis for corrosion resistance improvement of recycled aluminum alloys, laying a foundation for their application in high performance fields.

Key words

recycled aluminum / composite adding / polarization curve / electrochemical impedance spectroscopy / corrosion resistance

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YUAN Shengbo, ZHOU Fan, JIANG Jiajun, HUANG Run, GU Wei, JIN Huixin. Effect of Additives on Corrosion Resistance of Recycled Aluminum[J]. Journal of Netshape Forming Engineering. 2026, 18(6): 123-134 https://doi.org/10.3969/j.issn.1674-6457.2026.06.012

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Funding

Guizhou Province Science and Technology Program Project (Qiankehe Chengguo-LH[2024] Major 018, Qiankehe Zuche [2024] General 123); Guizhou Provincial Department of Education’s “Hundred Schools and Thousand Enterprises Technology Breakthrough and Charting the Course” Project (Qianjiaoji[2024]001)