Résumé
Iron was found to form coloured stable complexes with both adrenaline hydrogen tartrate and catechol as inhibitors for iron corrosion in aqueous solutions of different pH values [2.0-11.5]. The electrochemically formed complexes on the surface of the iron electrode in different media were separated and studied in comparison with the same complexes prepared by chemical method in the same media. The prepared complexes were studied using micro-, electro-and thermal analyses together with electron ionization mass [EI-MS] and IR spectral methods. Both chemically and electrochemically prepared complexes were found to be of the same structures. The electrochemically formed complex in different media was found to be as a chemisorbed layer on the surface of iron electrode. The aim of the present work is to compare the results of chemical and electrochemical techniques in preparation of stable iron chelates of both adrenaline hydrogen tatrate [AHT] and Catechol [Cat.] as inhibitors for iron corrosion. The morphology of the chemisorbed complex layers on the electrode surface was also tested by electron microscope [EMS] and characterized as an amorphous or crystalline adsorbents