Experimental and computational investigations on the anti-corrosive and adsorption behavior of 7-N,N'-dialkyaminomethyl-8-Hydroxyquinolines on C40E steel surface in acidic medium.

Two new 7-N,N'-dialkylaminomethyl-8-Hydroxyquinolines, namely 7-N,N'-dipropylaminomethyl-8-Hydroxyquinoline (DPQ) and 7-N,N'-dimethylaminomethyl-8-Hydroxyquinoline (DMQ), were synthesized and characterized using H/C NMR and Elemental analysis methods. Corrosion inhibition effect of DMP and DPQ for C40E steel in 1 M HCl was evaluated at different concentrations (10 to 10M) and temperatures (298 to 328 K) using several experimental and computational approaches. Weight loss and electrochemical studies showed that protection efficiencies (η) of DPQ and DMQ increase with increase in concentrations.