Synthesis, surface parameters and corrosion inhibition efficiency (η) of novel cationic gemini surfactant (NCGSN) (namely: N-(3-(2-((5-(2-(4-(dodecyldimethylammonio)butoxy)-2-oxoethoxy)naphthalen-1-yl)oxy)acetoxy)propyl)-N,N-dimethyldodecan-1-aminium bromide) were studied and discussed. The η of carbon steel (CS) was determined by weight loss (WL), electrochemical impedance spectroscopy (EIS) & potentiodynamic polarization (PP) in the absence and presence of NCGSN. The η and charge transfer resistance (Rct) increases with increasing the NCGSN concentration and decreases with increasing the temperature. Kinetic and adsorption thermodynamic values showed that the η occurs through adsorption of NCGSN molecules on CS surface according to Langmuir isotherm. The PP results proposed the NCGSN regards a mixed-type inhibitor. Chemical and electrochemical results confirmed by SEM and EDX results which recommended the NCGSN adsorption occurs due to the barrier film formed on CS surface.