Author/Authors :
Rezaierod Ali . نويسنده Electrochemistry and Inhibitors Group, Environmental Protection Department, Research Institute of Petroleum Industry (RIPI), Azadi sport complex Blvd., Tehran, Iran , Rahimi Ali . نويسنده Electrochemistry and Inhibitors Group, Environmental Protection Department, Research Institute of Petroleum Industry (RIPI), Azadi sport complex Blvd., Tehran, Iran , Chaghazardi Mosayeb نويسنده Electrochemistry and Inhibitors Group, Environmental Protection Department, Research Institute of Petroleum Industry (RIPI), Azadi sport complex Blvd., Tehran, Iran
Abstract :
The inhibition behavior of 1-(1-Naphthalenylmethyl) quinolinium chloride (NMQ)
on the corrosion of mild steel in 1.00 M hydrochloric acid has been investigated. Weight loss
measurements, potentiodynamic polarization and electrochemical impedance (EIS)
techniques were used to study the corrosion inhibition process. The results revealed that
maximum corrosion protection was 99% at 50 ppm of NMQ. Polarization measurements
indicate that inhibitor has mainly cathodic inhibition effects and therefore control of
hydrogen evolution is done. From EIS measurements it is found that charge transfer
resistance values increased and double layer capacitance values decreased by increasing the
inhibitor concentration. The adsorption of NMQ on the mild steel follows the Langmuir
isotherm model, calculated value of adsorption free energy was (–43.6) kJ mol-1 and
adsorption constant was 107.5
