Inhibition of corrosion of mild steel material in sulphuric acid medium has been tried with many
synthetic and green inhibitors. Each inhibitor has its own merits and limitations. The present study aims at
the synthesis of 8-Hydroxy Quinoline (8HQ) and Pyridine N-Oxide (PyNO) and the study of their inhibition
behaviour on the corrosion of mild steel in 2 N sulphuric acid. The inhibition behaviour of the synthesised
compounds was studied by subjecting to weight loss measurements, polarisation studies and electrochemical impedance
spectra (EIS) for the assessment of their performance. The studies were made with 2 N sulphuric acid as the corroding
medium, but with the inhibitor concentration in the range of 50 -350 ppm. The results revealed that the inhibitors studied
perform better in the medium and function by the mechanism of adsorption onto the metal surface.
Keywords: Mild steel, sulphuric acid, 8HQ and PyNO.
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