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<p>Metal alloys are widely used in industries and, over time, may corrode, depending on their use. Carbon steel has a favorable combination of properties and is widely used in structures and equipment. Therefore, its corrosion resistance depends on the exposure conditions. This study aims to develop an analysis of the efficiency of <i>Chrysopogon zizanioides</i> (L.) Roberty extract, aerial parts (AP) and roots parts (RP), as corrosion inhibitor, by means of gravimetric and electrochemical techniques, for SAE 1020 carbon steel in hydrochloric acid (HCl) environment. The functional groups were identified by Fourier transform infrared spectroscopy (FTIR). Thermogravimetric analysis (TGA) was also performed. Blank tests and three different concentrations of AP and RP extracts were used: 500, 1500 and 2500&#xa0;ppm. The extracts exhibited anticorrosive properties and resistance to high temperatures, with better results for RP.</p><p></p>

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Study of the Efficiency of the Use of Chrysopogon Zizanioides (L.) Roberty as a Corrosion Inhibitor of SAE 1020 Carbon Steel Immersed in Acidic Medium

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Ana Carolina Lima de Lucena,
  • Adeildo J. Oliveira,
  • Anniele Sterfany S. Leite,
  • Ana Laís A. Costa,
  • Jeniffer Mclaine D. Freitas,
  • Elvis Max X. Lima,
  • José Guimarães F. de Lima Jr.,
  • Dilton Gonçalves Teixeira,
  • Fabiane Caxico de Abreu,
  • Diógenes Meneses

摘要

Metal alloys are widely used in industries and, over time, may corrode, depending on their use. Carbon steel has a favorable combination of properties and is widely used in structures and equipment. Therefore, its corrosion resistance depends on the exposure conditions. This study aims to develop an analysis of the efficiency of Chrysopogon zizanioides (L.) Roberty extract, aerial parts (AP) and roots parts (RP), as corrosion inhibitor, by means of gravimetric and electrochemical techniques, for SAE 1020 carbon steel in hydrochloric acid (HCl) environment. The functional groups were identified by Fourier transform infrared spectroscopy (FTIR). Thermogravimetric analysis (TGA) was also performed. Blank tests and three different concentrations of AP and RP extracts were used: 500, 1500 and 2500 ppm. The extracts exhibited anticorrosive properties and resistance to high temperatures, with better results for RP.