Structural Investigation of N-Arylpyrroles as Iron Corrosion Inhibitors in Hydrochloric Acid

The authors found that substituted N-aryl-2,5-dimethylpyrroles are very effective inhibitors of iron corrosion in acid solutions

E. Stupnišvek-Lisac

2010

Scholarcy highlights

  • The authors found that substituted N-aryl-2,5-dimethylpyrroles are very effective inhibitors of iron corrosion in acid solutions
  • The efficiency of an inhibitor in protecting metals from corrosion is often associated with the molecular structure of the inhibitor as well as with the distribution of charge in the molecule
  • The effect of the type and the position of the substituted group of N-arylpyrrole derivatives on corrosion inhibition of iron in strong acid-pickling solution has been investigated using electrochemical methods
  • The effect of the temperature on the inhibition process is studied in the temperature range from 20 to 80°C
  • The activation energy calculated using Arrhenius plot for iron in 5 mol dm−3 hydrochloric acid is Ea = 14.9 kJ mol−1, and for iron in 5 mol dm−3 hydrochloric acid with the addition of 0.01 mol dm−3 1 - - 2,5-dimethylpyrrole, it is Ea = 87.9 kJ mol−1

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