Electrochemically and weight loss measurements were carried out to study the effect of laboratory synthesized 1,4-dimethyl phenyl-N,N-dimethylanilinium dibromide salt (DMPMA) on the corrosion inhibition of mild steel in 1.0M HCl solution containing various concentrations () 3 − × at 303 K. The percentage of inhibition in the presence of this inhibitor decreased with temperature which indicating a physical adsorption was the predominant inhibition mechanism. This inhibitor will have application in industries, where hydrochloric acid solutions at elevated temperatures are used to remove scale and salts from steel surfaces, such as acid cleaning of tankage and pipeline, and may render dismantling unnecessary.