from the conferences organized by TANGER Ltd.
It is already known, that porphyrin–bases are offering better protection against steel corrosion than metalloporphyrins due to their ability to form very stable metallic complexes by linking in their inner core the iron contained in different steels. In this respect, 5-(4-carboxy-phenyl)-10,15,20-tris-(4-phenoxy-phenyl)-porphyrin was synthesized by multicomponent Adler-Longo synthesis, using two different aldehydes and pyrrole, characterized to certify the structure and further used for formulating double thin layers in all possible combinations with MnTa2O6. The pseudo-binary oxide nanomaterials MnTa2O6 were synthesized by solid-state method. The corrosion protection exhibited by these nanostructures alone or in composites after deposition on carbon steel was comparatively assessed in acid environment. Different electrochemical techniques, such as: open circuit potential measurement and potentiodynamic polarization technique with Tafel representation were used. The performed tests reveal that corrosion protection is fairly good, with the best results indicating that the electrode covered with 5-(4-carboxy-phenyl)-10,15,20-tris-(4-phenoxy-phenyl)-porphyrin / MnTa2O6 has offered the best corrosion inhibition efficiency of 86.05
Keywords: Mono-carboxyl-substituted A3B porphyrins, MnTa2O6, steel, corrosion inhibition, Tafel curves© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.