ArticleAuthors: Truong, Thi Thao; Dinh, Thi Kim Dung (2016)
Corrosion inhibition of mild carbon steel, CT3 in hydrochloric acid by caffeine (with different concentrations, from 0.01g/l to 3.00g/l) was investigated at room temperatures using weight loss and electrochemical impedance spectroscopy (EIS) technique. Experiment result under two methods has good coincidence and shows that: as the concentration of caffeine increases, the inhibition efficiency increases. Caffeine is found to be an excellent inhibitor for steel alloys with an efficiency reaching 90 % at 3.00g/l of inhibitor concentration. When the trial period lasting up to 10 days, %IE decreased slightly but relatively stable. 
