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<p>This study aimed to analyze and evaluate the performance of surface and corrosion behavior of SMA steel exposed to alkaline solutions. The initial characteristics were performed using scanning electron microscopy (SEM). The corrosion resistance performance of SMA steel with varying carbon composition with and without 30% strain in different alkaline environments (pH 14, pH 10, and pH 8) was investigated using electrochemical methods. The change in surface morphology and chemical composition was analyzed using SEM-EDAX, AFM, EDX, and XPS. The test results showed that the performance of SMA steel in an alkaline environment was affected by carbon content and the 30% strain process. Higher carbon content and 30% strain treatment caused an increase in corrosion rate. The highest corrosion rate in SMA steel with a content of 0.39% C with a pre-strain was obtained at 5.87 mpy. In addition, the pH level of the solution significantly affects the cycling behavior and surface morphology of shape memory alloy steels in alkaline solutions. The cycling behavior is relatively stable, with minimal corrosion damage in high alkaline (pH 14) and moderate alkaline (pH 10) conditions. Meanwhile, in slightly alkaline solutions (pH 8), aggressive damage to the oxide layer and local corrosion occurs.</p>

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Performance of shape memory alloys steel in an alkaline environment: surface and interface analysis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月14日

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  • Yulinda Lestari,
  • Mukhlis Agung,
  • Rahardian Roberto,
  • Septian Adi Chandra,
  • Dedi Pria Utama,
  • Muhammad Yunan Hasbi,
  • Dhany Zulkarnain,
  • Efendi Mabruri,
  • Ahmad Royani

摘要

This study aimed to analyze and evaluate the performance of surface and corrosion behavior of SMA steel exposed to alkaline solutions. The initial characteristics were performed using scanning electron microscopy (SEM). The corrosion resistance performance of SMA steel with varying carbon composition with and without 30% strain in different alkaline environments (pH 14, pH 10, and pH 8) was investigated using electrochemical methods. The change in surface morphology and chemical composition was analyzed using SEM-EDAX, AFM, EDX, and XPS. The test results showed that the performance of SMA steel in an alkaline environment was affected by carbon content and the 30% strain process. Higher carbon content and 30% strain treatment caused an increase in corrosion rate. The highest corrosion rate in SMA steel with a content of 0.39% C with a pre-strain was obtained at 5.87 mpy. In addition, the pH level of the solution significantly affects the cycling behavior and surface morphology of shape memory alloy steels in alkaline solutions. The cycling behavior is relatively stable, with minimal corrosion damage in high alkaline (pH 14) and moderate alkaline (pH 10) conditions. Meanwhile, in slightly alkaline solutions (pH 8), aggressive damage to the oxide layer and local corrosion occurs.