Adsorption and corrosion inhibition behavior of aluminium by 2,6-di methyl pyridine in distilled water

Chemical and electrochemical measurements were used to study the corrosion inhibition of aluminium in distilled water using one of pyridine derivatives as corrosion inhibitor.

Corrosion inhibition of aluminum in distilled water was investigated in the absence and presence of different concentrations of 2,6-di methyl pyridine (DMP). Potentiodynamic polarization, open circuit potential and Fourier Transform Infrared Spectroscopy were employed.

Inhibition efficiency of 86 per cent is reached with 0.0187 M of DMP at 25°C. Potentiodynamic polarization showed that DMP behaves as mixed type inhibitor. The inhibitor obeyed the Langmuir adsorption isotherm. The value of ΔG°_ads suggests physico-chemical adsorption of the inhibitor molecule on the aluminium surface.

This paper indicates DMP could be used as corrosion inhibitor to prevent the corrosion of aluminium in in distilled water.