Corrosion inhibition of mild steel by two new 1,2,4-triazolo[1,5-a] pyrimidine derivatives in 1 M HCl: Experimental and computational study

The inhibition ability of two new 1,2,4-triazolo[1,5-a]pyrimidine derivatives (p3 and p4) towards mild steel corrosion in 1 m hcl solution was studied at various concentrations and temperatures using mass loss,polarization curves,and electrochemical impedance spectroscopy (eis)methods. the experimental results reveal that p3 and p4 are efficient mixed type corrosion inhibitorsand their inhibition efficiencies increase with increasing concentration. the adsorption of these inhibitors on mild steel surface obeys langmuir isotherm. quantum chemical parameters were calculated using the density functional theory method (dft). the correlation between theoretical and experimental results was discussed. © 2017.