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<p>In the present day, the problem of corrosion damage of washing machine castings, e.g. drum spiders made of aluminum alloys, deserves attention due to the aggressive influence of modern phosphates-free laundry detergents containing oxygen bleaches. The present study investigates the microstructure and mechanical properties of Al-Mg-Si casting alloys with varying Mg/Si ratios, and it was established that alloys with high Si and high Mg content provide the highest level of mechanical properties. The immersion corrosion tests and polarization corrosion test in a 1% laundry detergent water solution containing oxygen bleach and 5.7% NaCl + 0.3% H<sub>2</sub>O<sub>2</sub> water solution show the different behavior of alloys in mentioned solutions and great effect of Mg/Si ratio in alloy on it. Overall, it was established that alloys with high Mg content are preferable to conventional Si-rich alloys (ADC3) for washing machine components production due to the same level of mechanical properties but at the same time better corrosion resistance.</p>

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The Influence of Si and Mg Content on the Microstructure, Mechanical Properties, and Corrosion Resistance of Die-Cast Al-Mg-Si Alloys

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • V. E. Bazhenov,
  • A. V. Sannikov,
  • V. A. Bautin,
  • A. A. Komissarov,
  • A. V. Koltygin,
  • V. D. Belov

摘要

In the present day, the problem of corrosion damage of washing machine castings, e.g. drum spiders made of aluminum alloys, deserves attention due to the aggressive influence of modern phosphates-free laundry detergents containing oxygen bleaches. The present study investigates the microstructure and mechanical properties of Al-Mg-Si casting alloys with varying Mg/Si ratios, and it was established that alloys with high Si and high Mg content provide the highest level of mechanical properties. The immersion corrosion tests and polarization corrosion test in a 1% laundry detergent water solution containing oxygen bleach and 5.7% NaCl + 0.3% H2O2 water solution show the different behavior of alloys in mentioned solutions and great effect of Mg/Si ratio in alloy on it. Overall, it was established that alloys with high Mg content are preferable to conventional Si-rich alloys (ADC3) for washing machine components production due to the same level of mechanical properties but at the same time better corrosion resistance.