[en] This research is focused on the study of the electropolymerization process and the behaviour of the Neutral Red on stainless steel surfaces. The aim of this work is to obtain stable polymer deposits on stainless steel surfaces and to study the anticorrosive properties of the polymer in chlorides media. To carry out the research electrochemical techniques have been used to generate stable deposits of Poly-(Neutral Red) on stainless Steel 304 and carbon steel surfaces. To optimize the polymeric deposits obtained on these surfaces, the deposit conditions have been changed. These variations correspond to the organic and inorganic media used, where pH has been changed in order to test the proton concentration influence in the media. Additionally, electrochemical techniques such as cyclic voltammetry, open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) have been used to characterize polymeric films. Treatments in a salt spray chamber have been realized to study the anticorrosive behaviour of the polymer. These results show that this material can be used as a potential anticorrosive coating. Furthermore, the electrochemical stability of the polymer has been studied in chloride media. Likewise, the generation of stable films of the material on metallic surfaces open the possibility of being used) as a primer film, that is to say, it can be useful as a decorative element or be used as a primer to deposit other polymers on it. To achieve this, multilayer systems have been tested to improve protective properties of the polymeric film on stainless steel and carbon steel surfaces. On the other hand, due to the electrochromic character of the polymer it has been possible to characterize the samples using spectroscopic and electrochemical techniques. The aim is to know the detailed properties and behaviour of the polymer. This has been observed using a spectroelectrogravimetric study, in continuous and alternating regime current. This study has allowed us to know the electrochemical reactions that are produced in the polymer in different media. In this way, using mathematical models, it was possible to know the contribution of parasite reactions that are produced in the material in these media. To observe this, the Electrochemical Quartz Crystal Microbalance (EQCM) has been used. This allows us to observe small changes of mass on the electrode surface. Finally, to compare the behaviour of the sample with other materials, Neutral Red has been deposited on nickel surfaces. This is an important compound in the synthesis of stainless steels. This helps improve our understanding of the behaviour of the polymeric film on other samples. Likewise, EQCM combined with cyclic voltammetry have been used to show the anti corrosive behaviour in chloride media.

[es] Esta investigación se centra en el estudio de la electropolimerización y el comportamiento de Rojo Neutro sobre superficies de acero inoxidable. El objetivo de este trabajo se fundamenta en la obtención de depósitos poliméricos estables sobre estas superficies con objeto de estudiar las propiedades anticorrosivas del polímero en medios clorurados. Se han empleado técnicas electroquímicas para generar depósitos estables de Poli-(Rojo Neutro) sobre superficies de acero inoxidable 304 y de acero al carbono. Con objeto de estudiar el comportamiento anticorrosivo del polímero, se han realizado tratamientos en cámara de niebla salina que muestran resultados prometedores para la utilización del material como recubrimiento anticorrosivo. Además, el hecho de generar películas estables del material sobre superficies metálicas abre la posibilidad de ser empleado como un film de imprimación, es decir, puede ser útil tanto como elemento decorativo como servir de base para depositar otros polímeros sobre él. Por otra parte, debido al carácter electrocrómico que presenta el polímero se han podido caracterizar las muestras mediante métodos espectroscópicos y electroquímicos. Con el objetivo de conocer las propiedades y el comportamiento del polímero en profundidad se han realizado estudios espectroelectrogravimétricos, tanto en régimen de corriente continua, como en régimen de corriente alterna, los cuales han permitido conocer las diferentes reacciones electroquímicas que se producen en el polímero en diferentes medios. De este modo, y mediante el empleo de modelos matemáticos se ha podido conocer la contribución de las reacciones parásitas que presenta el material en estos medios. Finalmente, en aras de comparar el comportamiento del sustrato con otros materiales se ha realizado un estudio del material sobre superficies de níquel que ha mostrado el carácter anticorrosivo del mismo en medios clorurados.