A surface and electrochemical study of polypyrrole coated on stainless steel and copper

In-situ odd random phase electrochemical impedance spectroscopy study on the electropolymerization of pyrrole on iron in the presence of sodium salicylate – The influence of the monomer concentration

“…However, El Jaouhari et al [39] characterize the passivation layer on iron as an iron oxide and/or iron salicylate complex. Similar passivating properties have also been observed in the case of malic acid with iron [40], sulfuric acid with steel [41] or dodecylbenzenesulfonic acid with copper [33]. On the contrary, the electropolymerization of pyrrole on oxidizable metals has not been possible in the presence of poly-styrenesulfonate (PSS) [35,36] or dodecyl sulfate (DS -) anions [36].…”

“…Polypyrrole has already been electrochemically polymerized on different kinds of active metals such as steel/iron [8,29,30], magnesium [31,32], nickel [27], zinc [28] or copper [33,34] and in presence of several kinds of supporting electrolytes [8,27,30,31]. It has been 4…”

“…Most investigations have been carried out by potential sweep methods [32,34,39,44,45] or under potentiostatic/galvanostatic control [34,35,40,41,46]. Other measurement techniques such as X-ray photoelectron spectroscopy (XPS) [33,41], time-of-flight secondary ions mass spectrometry (ToF-SIMS) [33], electrochemical quartz crystal microbalance (EQCM) [28] or in-situ Raman spectroscopy [37] have also been used to get insight into the polymer electrosynthesis. Moreover, there have been some attempts to study the electropolymerization by electrochemical impedance spectroscopy (EIS) [47,48].…”

Electrodeposition of Polypyrrol/Platinum Films

“…Con este fin se ha estudiado la electrodeposición de PPy con incorporación de platino, plata u oro, en experimentos independientes, sobre sustratos tales como: carbono vítreo, oro y platino [1,[4][5][6][7][8][9]. Adicionalmente, se han reportado estudios de electrodeposición de PPy sobre otros sustratos tales como acero inoxidable 304 y 316L, donde se evalúan propiedades morfológicas, propiedades anticorrosivas y en aplicaciones como biosensores [2,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Los sustratos de acero inoxidable, utilizados como soporte en sistemas poliméricos modificados con partículas catalíticas, son muy atractivos para las aplicaciones tecnológicas.…”

"Síntese e caracterização da mistura de polianilina em diferentes matrizes poliméricas para proteção contra a corrosão de ligas metálicas"

“…39 (b) . Esta concentração inicial foi escolhida por ser citada como ótima em diversos trabalhos sobre a síntese química de PAni-DBSA [25,29,31]. Desta forma, é interessante ressaltar que as investigações foram realizadas em concentrações de DBSA acima de sua cmc.…”