Mono- and dicationic benzothiazolic quaternary ammonium bromides as mild steel corrosion inhibitors. Part III: Influence of the temperature on the inhibition process

The influence of the temperature on the inhibitive properties of seven mono- and dicationic quaternary ammonium bromides on mild steel was investigated in 1 M HCl and 1 M H2SO4. Impedance, polarisation resistance and polarisation curves methods were used. Two adequate structural models of the interface metal/1 M HCl + inhibitor.were proposed to describe the processes in different temperature ranges. The values of the models' parameters were determined. The influence of the temperature on the inhibitor efficiency was studied as well. The apparent activation energy was found using two independent methods. Conclusions were made about the inhibitors' adsorption type. (C) 2015 Elsevier Ltd. All rights reserved.