Scholarlink

<p>Corrosion in seawater significantly undermines the mechanical strength and stability of steel structures. Accurate prediction of the stress–strain curve (SS-C) for steel post-corrosion is essential for the safety assessment of in-service steel structures. This study evaluates the mechanical properties of Q345 low-carbon steel following corrosion. Accelerated corrosion was conducted using electrochemical techniques, resulting in a power function model correlating mass loss rate with corrosion time. Then, the tensile tests were performed to compare the mechanical properties of samples before and after corrosion. The results demonstrate that the strength and elongation of Q345 steel decrease as the mass loss rate increases. Furthermore, as corrosion time extends, the bright white brittle region at the fracture surface increases while the size of the dimples diminishes without alterations in the microstructure. Based on the existing stress–strain curve model (SS-C), this study proposes a new model that offers more accurate predictions during the strengthening phase, exhibiting a strong correlation with experimental stress–strain curves and providing significant insights into the mechanical behavior of corroded Q345 low-carbon steel.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the Early Corrosion Behavior and Mechanical Properties of Low-Carbon Steel in a Simulated Seawater Environment

  • 期刊论文

  • 发表日期：

    2025年1月1日

查看全文
  • Z. Peng,
  • Z. R. Bao,
  • W. J. Dan,
  • X. Y. Wang

摘要

Corrosion in seawater significantly undermines the mechanical strength and stability of steel structures. Accurate prediction of the stress–strain curve (SS-C) for steel post-corrosion is essential for the safety assessment of in-service steel structures. This study evaluates the mechanical properties of Q345 low-carbon steel following corrosion. Accelerated corrosion was conducted using electrochemical techniques, resulting in a power function model correlating mass loss rate with corrosion time. Then, the tensile tests were performed to compare the mechanical properties of samples before and after corrosion. The results demonstrate that the strength and elongation of Q345 steel decrease as the mass loss rate increases. Furthermore, as corrosion time extends, the bright white brittle region at the fracture surface increases while the size of the dimples diminishes without alterations in the microstructure. Based on the existing stress–strain curve model (SS-C), this study proposes a new model that offers more accurate predictions during the strengthening phase, exhibiting a strong correlation with experimental stress–strain curves and providing significant insights into the mechanical behavior of corroded Q345 low-carbon steel.