Kahyaoglu, H.Tuncel, M.2019-08-012019-08-0120140970-70770975-427Xhttps://dx.doi.org/10.14233/ajchem.2014.16859https://hdl.handle.net/11480/4181This study investigated the effects on the behaviour of mild steel in 0.1 M HCl and 0.1M H2SO4 solution of the [4-(3-methoxy-salicylideneamino)-5-hydroxynaphthalene-2,7-,disulfonic acid diisodium salt (L-1) and 4-(3-methoxysalicyaldimino)-5-hydroxy-6-(2-nitrophenylazo)-2,7-naphthalene disulfonic acid disodium salt (L-2) in different concentrations with current-potential and electrochemical impedance spectroscopy (EIS) techniques. Polarization curves revealed that Schiff bases are mixed type inhibitors. Adsorption of Schiff bases on mild steel surface is spontaneous and,obeys Langmuir's isotherm. As a result, the inhibition efficiency of L-2 is higher than L-1 for the studied medium. Moreover, inhibition efficiency increases with increase in the concentration of the inhibitor.eninfo:eu-repo/semantics/openAccessSchiff baseInhibitorImpedance spectroscopyAcid corrosionMild steelArticle2672177218110.14233/ajchem.2014.168592-s2.0-84901020178Q4WOS:000336777300067N/A