The effectiveness of inhibition of carbon steel 1018 in 1 M solution of HCl by three ethoxylated aliphatic alcohols with a different number of ethylene oxide units was investigated by measuring the weight loss of the steel and galvanostatic polarization. An increase in the effectiveness of inhibition with an increase in the concentration of the inhibitor, number of ethylene oxide units in its molecule, and decrease in the temperature was found. Inhibition of corrosion is due to adsorption of ethylene oxide groups in the inhibitors on the metal surface. Adsorption is described by a Langmuir isotherm. The effect of the temperature on the corrosion rate in the presence and absence of inhibitors was investigated. Some thermodynamic parameters of corrosion were calculated.