Characterization of Kaolinite (Al2Si2O5 (OH)4) and Lansoprazole (C16H14N3F3O2S) for Developing a Structured Coating

Tuesday, 7 October 2014
Expo Center, 1st Floor, Center and Right Foyers (Moon Palace Resort)
E. Sarmiento Bustos (Universidad Tecnologica Emiliano Zapata del Estado de Morelos), L. Concha Guzman (Universidad Autonoma del Estado de Morelos CIICAp), J. Uruchurtu (CIICAp), C. Menchaca (Universidad Autonoma del Estado de Morelos), and O. Dominguez Perez (Universidad Tecnologica Emiliano Zapata del Estado de Morelos)
The phenomenon of corrosion is impaired and the different materials. Industrially it has worked in the protection of these, however, efforts can increase costs if the methods and mechanisms are not adequate and therefore inefficient. Currently, several studies focus on the development of new coatings that act as corrosion inhibitors from natural sources with no toxic properties. Kaolinite (Al2Si2O5 (OH) 4) is considered a "green" low cost material and promotes it to be used as a container of polymeric materials because of their porous characteristics. Moreover, some drugs such as omeprazole (C17H19N3O3S), pantoprazole (C16H15N3F2O4S) for their inhibitory properties in acidic environments are ideal candidates for use as corrosion inhibitors to replace those that are typically toxic as chromate lithium (Li2CrO4).

In this paper the development of a structured coating consisting of kaolinite (Al2Si2O5 (OH) 4) doped with lansoprazole (C16H14N3F3O2S) and a polymer film with the purpose of protecting metallic materials such as steel is presented. The objective of this work is to characterize kaolinite (Al2Si2O5 (OH) 4) in the raw natural state and heat treated at 350, 400, 450 and 560 ° C by Scanning Electron Microscopy (SEM). Lansoprazole ((C16H14N3F3O2S)) was characterized by electrochemical techniques: polarization curves and electrochemical impedance spectroscopy (EIS).

The results show that the kaolinite in its natural state has amorphous and crystalline particles with impurities. When the heating process mesoporous particles were obtained. Lansoprazole effectiveness at different concentrations (50, 75, 100, 125, 150 and 200 ppm) was evaluated in an aqueous solution of ammonium sulfate ((NH)4 SO4) with sodium chloride (NaCl) at pH 7 and 25 ° C using mild steel.

The results suggest that at 500 °C mesoporous kaolinite particles which may be applied as inhibitory container obtained lansoprazole, gave the better electrochemical response. Moreover lansoprazole has the highest efficiency as a corrosion inhibitor at 125 ppm.