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In order to study the corrosion inhibition performance of syringaldehyde-1, 4-phenylenediamine Schiff base on low carbon steel in different acidic media, syringaldehyde-1, 4-phenylenediamine Schiff base (SPSB) was prepared by using syringaldehyde and 1, 4-phenylenediamine as raw materials, and its structure was characterized by nuclear magnetic resonance. The corrosion inhibition of low carbon steel in different acidic media (4.44 M HCl, 2.22 M H2SO4, 1 M HCl, 0.5 M H2SO4) was studied by electrochemical method (AC impedance spectroscopy, polarization curve) and weight loss method. The results showed that the inhibition efficiency of SPSB on low carbon steel in 4.44 M HCl was higher than that in 2.22 M H2SO4 at 25 °C, and the inhibition efficiency of SPSB on low carbon steel in 1 M HCl was higher than that in 0.5 M H2SO4. Under the same acid conditions, the inhibition efficiency of SPSB on low carbon steel in 4.44 M HCl is greater than that in 1 M HCl, and the inhibition efficiency of SPSB on low carbon steel in 2.22 M H2SO4 is greater than that in 0.5 M H2SO4.

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Experimental Study of a Schiff Base as Corrosion Inhibitor for Mild Steel in 1 M HCl

  • 会议论文

  • 发表日期：

    2026年

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  • Yuanfang Deng,
  • Xiaolong Li,
  • Yanxi Yu,
  • Wenjun Zhang,
  • Junxing Zhao,
  • Junlan Li,
  • Fangde Fan,
  • Bing Yi,
  • Yutong Wei,
  • Jing Zhou,
  • Jiajun He,
  • Chuntan Chen,
  • Chuan Lai

摘要

In order to study the corrosion inhibition performance of syringaldehyde-1, 4-phenylenediamine Schiff base on low carbon steel in different acidic media, syringaldehyde-1, 4-phenylenediamine Schiff base (SPSB) was prepared by using syringaldehyde and 1, 4-phenylenediamine as raw materials, and its structure was characterized by nuclear magnetic resonance. The corrosion inhibition of low carbon steel in different acidic media (4.44 M HCl, 2.22 M H2SO4, 1 M HCl, 0.5 M H2SO4) was studied by electrochemical method (AC impedance spectroscopy, polarization curve) and weight loss method. The results showed that the inhibition efficiency of SPSB on low carbon steel in 4.44 M HCl was higher than that in 2.22 M H2SO4 at 25 °C, and the inhibition efficiency of SPSB on low carbon steel in 1 M HCl was higher than that in 0.5 M H2SO4. Under the same acid conditions, the inhibition efficiency of SPSB on low carbon steel in 4.44 M HCl is greater than that in 1 M HCl, and the inhibition efficiency of SPSB on low carbon steel in 2.22 M H2SO4 is greater than that in 0.5 M H2SO4.