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<p>Unearthed metal artifacts are often severely corroded, making adhesive repair a preferred conservation method. However, during long-term preservation and exhibition, even after soil removal, ongoing secondary corrosion and environmental factors can cause mechanical and physical degradation of these repaired artifacts (e.g., cast iron, bronze). Therefore, understanding the influence of environmental factors on the mechanical properties of adhesively repaired metal artifacts is crucial. This study investigates the mechanical performance of adhesively bonded cast iron subjected to accelerated corrosion and environmental degradation through experimental and numerical simulation. An alternating dry–wet chamber was designed to simulate natural corrosion, with cast iron specimens exposed for varying durations to assess the effects. Furthermore, a combined moisture–heat–light aging platform was developed to study coupled environmental influences. The results indicated that exposure to the moisture–heat–light environment reduced the bonding strength of corroded single lap joints by 90.19%, compared to a 60.29% reduction for non-corroded joints. Finite element simulations, validated by experimental data (with a deviation below 3%), identified cohesive failure as the dominant failure mode. This study provides a reliable method for evaluating the long-term mechanical degradation of adhesively repaired metal artifacts subjected to environmental aging.</p>

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Experimental and Simulation Study on the Mechanical Performance of Adhesively Bonded Cast Iron after Accelerated Corrosion Subjected to Environmental Degradation

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Wenxuan Zou,
  • Jun Fan,
  • Wei Tan,
  • Xiao Han,
  • Jingyu Ma

摘要

Unearthed metal artifacts are often severely corroded, making adhesive repair a preferred conservation method. However, during long-term preservation and exhibition, even after soil removal, ongoing secondary corrosion and environmental factors can cause mechanical and physical degradation of these repaired artifacts (e.g., cast iron, bronze). Therefore, understanding the influence of environmental factors on the mechanical properties of adhesively repaired metal artifacts is crucial. This study investigates the mechanical performance of adhesively bonded cast iron subjected to accelerated corrosion and environmental degradation through experimental and numerical simulation. An alternating dry–wet chamber was designed to simulate natural corrosion, with cast iron specimens exposed for varying durations to assess the effects. Furthermore, a combined moisture–heat–light aging platform was developed to study coupled environmental influences. The results indicated that exposure to the moisture–heat–light environment reduced the bonding strength of corroded single lap joints by 90.19%, compared to a 60.29% reduction for non-corroded joints. Finite element simulations, validated by experimental data (with a deviation below 3%), identified cohesive failure as the dominant failure mode. This study provides a reliable method for evaluating the long-term mechanical degradation of adhesively repaired metal artifacts subjected to environmental aging.