caa a22 4500 46322664X CHVBK 20180405153229.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10853-006-1389-5 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1389-5 Mahmoud S. Chemistry Department, University College of Girls for Arts, Science and Education, Ain Shams University, Heliopolis, Cairo, Egypt aut Corrosion inhibition of iron by amphoteric surfactants in hydrochloric acid solutions [Elektronische Daten] [S. Mahmoud] In the present work the corrosion inhibition of iron in 2M HCl solution by amphoteric surfactants was studied. The techniques of measurements were (i) weight loss, (ii) linear polarization and (iii) electrochemical impedance spectroscopy. The investigated surfactants have the structure: Fig.a where, R=-C14H29(I), -C15H31(II), -C16H33(III), -C17H35(IV), -C18H37(V). These surfactants have a high inhibitory effect on the corrosion of iron in HCl solution. The inhibiting effect of these surfactants may take place through the blocking effect resulting from their adsorption on the metallic surface and hydrophobic effect. The inhibition efficiency increases according to the order: I<II<III<IV<V. This is due to the increase of the length of the alkyl group (-R) in the surfactants. The adsorption of these surfactants via their adsorption centers on the metallic surface obeyed the Frumkin adsorption isotherm. The presence of these surfactants in the corrosive solution increases the activation energy of the corrosion process with that order of inhibition efficiency. Springer Science+Business Media, LLC, 2007 Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 989-997 0022-2461 42:3<989 2007 42 10853 https://doi.org/10.1007/s10853-006-1389-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1389-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Mahmoud S. Chemistry Department, University College of Girls for Arts, Science and Education, Ain Shams University, Heliopolis, Cairo, Egypt aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/3(2007-02-01), 989-997 0022-2461 42:3<989 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer