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Estimating the anti-corrosive potency of 3-nitrophthalic acid as a novel and natural organic inhibitor on corrosion monitoring of mild steel in 1 M HCl solution

Inorganic Chemistry Communications, ISSN: 1387-7003, Vol: 158, Page: 111533
2023
  • 9
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    9
    • Citation Indexes
      9
  • Captures
    11

Article Description

Application of inhibitors is the most practical technique for protection of metals against corrosion in harsh solutions. But, the environmental worries and the carcinogenic impact have caused some traditional inhibitors to be banned by several international agencies. So, remarkable attention has been directed to the natural compounds. This project aimed to introduce a natural organic compound named 3-nitrophthalic acid as a novel corrosion inhibitor for enhancement of steel structure lifetime against corrosion in an acidic medium. Electrochemical measurements were done for this purpose. Fourier Transform Infrared (FT-IR) and UV–Visible spectroscopies were applied to characterize chemical structure of the inhibitor. Electrochemical impedance spectroscopy (EIS) manifested the maximum inhibition performance of about 80.51 % for the sample containing 400 ppm 3-nitrophthalic acid. Potentiodynamic polarization outcomes exhibited reduction of both anodic and cathodic reactions rate in the presence of inhibitor through a mixed inhibition mechanism. Besides, surface examinations including scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle (CA) confirmed the anticorrosive behavior of 3-nitrophthalic acid via surface smoothness and the creation of a hydrophobic film arising from inhibitor adsorption on the mild steel surface, which obeyed the Langmuir adsorption model.

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