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<p>Advanced high-strength steels (AHSS) are used in the automotive sector for their excellent combination of tensile strength and ductility, as well as their ability to reduce material thickness, thereby lowering fuel consumption and greenhouse gas emissions. There are three generations of AHSS, and the third-generation steel is the latest. This study aimed to investigate a medium manganese steel with 11&#xa0;wt% of Mn content through potentiodynamic tests, employing a 3.5% NaCl solution as an electrolyte and four distinct steel conditions: hot rolling at 1100&#xa0;°C, warm rolling at 680&#xa0;°C, hot rolling followed by intercritical annealing treatment, and warm rolling followed by intercritical annealing treatment. In both cases, the intercritical annealing heat treatment was performed at 700&#xa0;°C for a 2&#xa0;h soaking time. The results indicate that morphological phases affect corrosion behavior, with laminar morphology exhibiting greater resistance than a mixture of laminar and globular morphologies.</p> Graphical abstract <p></p>

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Study of the impact of microstructure on the corrosion rate of a third-generation advanced high-strength steel assessed in a saline environment

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • C. Fernandez-Salvador,
  • J. C. Villalobos,
  • P. Garnica-González,
  • A. J. Bocanegra-Hueramo,
  • Y. Solana-Reyes,
  • S. Garibay-Coria

摘要

Advanced high-strength steels (AHSS) are used in the automotive sector for their excellent combination of tensile strength and ductility, as well as their ability to reduce material thickness, thereby lowering fuel consumption and greenhouse gas emissions. There are three generations of AHSS, and the third-generation steel is the latest. This study aimed to investigate a medium manganese steel with 11 wt% of Mn content through potentiodynamic tests, employing a 3.5% NaCl solution as an electrolyte and four distinct steel conditions: hot rolling at 1100 °C, warm rolling at 680 °C, hot rolling followed by intercritical annealing treatment, and warm rolling followed by intercritical annealing treatment. In both cases, the intercritical annealing heat treatment was performed at 700 °C for a 2 h soaking time. The results indicate that morphological phases affect corrosion behavior, with laminar morphology exhibiting greater resistance than a mixture of laminar and globular morphologies.

Graphical abstract