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<p>The 5083 aluminum alloy’s corrosion process is greatly accelerated, and its corrosion resistance is decreased by secondary phase particles, which act as preferred sites for corrosion start. For the purpose of creating lightweight, corrosion-resistant alloys appropriate for maritime conditions, a thorough examination of the process by which secondary phases affect corrosion behavior is therefore highly valuable from a scientific and engineering standpoint. The corrosion behavior of hot-rolled 5083 aluminum alloy sheets upon immersion in saltwater simulation was methodically examined in this study. The process, by which second phases affect alloy corrosion resistance, was discovered by combining first-principles simulations with the evolution of second-phase composition and morphology at various annealing temperatures. The following are the conclusions reached: In the 5083 aluminum alloy, localized corrosion preferentially starts in the Al-Fe, Al-Mn, Al-Mn-Fe, and Mg-Si phase areas, greatly speeding up the corrosion process. Second-phase particles separate as corrosion duration rises, which leads to the creation of corrosion cavities.</p>

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Demonstration of the Corrosion Mechanism of 5083 Aluminum Alloy under Simulated Seawater Immersion Using First-Principles Simulations

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Meixue Song,
  • Ruifeng Dong,
  • Tianyuan Xu,
  • Quanchao Lu,
  • Peiying Zhou,
  • Rong Wang

摘要

The 5083 aluminum alloy’s corrosion process is greatly accelerated, and its corrosion resistance is decreased by secondary phase particles, which act as preferred sites for corrosion start. For the purpose of creating lightweight, corrosion-resistant alloys appropriate for maritime conditions, a thorough examination of the process by which secondary phases affect corrosion behavior is therefore highly valuable from a scientific and engineering standpoint. The corrosion behavior of hot-rolled 5083 aluminum alloy sheets upon immersion in saltwater simulation was methodically examined in this study. The process, by which second phases affect alloy corrosion resistance, was discovered by combining first-principles simulations with the evolution of second-phase composition and morphology at various annealing temperatures. The following are the conclusions reached: In the 5083 aluminum alloy, localized corrosion preferentially starts in the Al-Fe, Al-Mn, Al-Mn-Fe, and Mg-Si phase areas, greatly speeding up the corrosion process. Second-phase particles separate as corrosion duration rises, which leads to the creation of corrosion cavities.