In the present work, compound 3´-(2,6-dimethoxybenzoyl)-benzyl 2,6-dimethoxybenzoate (RM4) was evaluated for its ability as a corrosion inhibitor in 3% chloride medium and using an API 5L X70 steel working electrode. The electrochemical system by techniques such polarization curves (CP) impedance spectroscopy (EIS), finding through values obtained that efficiency of at 50 ppm reached 73.2% agai...