Corrosion control of aluminum surfaces by polypyrrole films: influence of electrolyte

Liu, Andréa Santos; Oliveira, M. A. S.

doi:10.1590/s1516-14392007000200018

Cited by 28 publications

(18 citation statements)

References 23 publications

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“…Previous results have shown that the formation of overoxidized films onto aluminum surfaces depend on the electrolyte (A -) nature. 16 In citric acid medium the plateau potential for galvanostic deposition was 1.5 V vs Ag/AgCl resulting in the overoxidized film that was confirmed by the presence of carbonyl in the FTIR spectrum. …”

Section: Electrodeposition Of Polypyrrolementioning

confidence: 88%

“…In 0.2 mol.L -1 electrolyte, a porous aluminum oxide layer was formed, favoring the PPy film growth. Furthermore, the higher the monomer concentration was, the faster the oxidation reaction of pyrrole at the aluminum/electrolyte solution interface, and the electropolymerization process commenced at lower oxidation potential 15,16 . Higher electrodeposition potential was undesirable since overoxidized PPy films were formed.…”

Section: Electrodeposition Of Polypyrrolementioning

confidence: 99%

“…Doped films can be deposited depending on the synthesis conditions, such as electrolyte, pH, and deposition potential 15,16 . The electrolyte plays an important role in determining the porosity of the oxide film formed under the PPy film.…”

Section: Introductionmentioning

confidence: 99%

“…The electrolyte plays an important role in determining the porosity of the oxide film formed under the PPy film. Additionally, the electrolyte can participate as dopant and incorporate onto PPy film 16 . Studies have also shown that the corrosion protection of aluminum surfaces by PPy films depends on synthesis conditions.…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of polypyrrole films on aluminum surfaces from a p-toluene sulfonic acid medium

2009

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Electrodeposition of polypyrrole films on aluminum from aqueous solutions containing p-toluene sulfonic acid and pyrrole was performed by cyclic voltammetry and galvanostatic technique. The influence of applied current density on the morphology of the films was studied by Scanning Electron Microscopy. The films displayed a cauliflower-like structure consisting of micro-spherical grains. This structure is related to dopand intercalation in the polymeric chain. Films deposited at higher current density were more susceptible to the formation of pores and defects along the polymeric chain than films deposited at lower current density. These pores allow the penetration of aggressive species, thereby favoring the corrosion process.

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Section: Electrodeposition Of Polypyrrolementioning

confidence: 88%

Section: Electrodeposition Of Polypyrrolementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of polypyrrole films on aluminum surfaces from a p-toluene sulfonic acid medium

2009

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“…PPy has been applied in a number of applications, such as batteries, supercapacitors, sensors, microwave shielding and corrosion protection [3][4][5]. In addition, PPy can be used as conducting filler in insulating polymer matrices in preparation of electrically conducting composites.…”

Section: Introductionmentioning

confidence: 99%

Poly(4-Chloromethyl Styrene-g-4-Vinylpyridine)/TiO2 Thin Films as Templates for the Synthesis of Polypyrrole in the Nanometer-Sized Domain

Jaymand

2011

Designed Monomers and Polymers

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Poly(4-chloromethyl styrene-g-4-vinylpyridine)/TiO 2 ((PCMSt-g-P4VP)/TiO 2 ) nanocomposite was employed as template for the synthesis of polypyrrole (PPy) in the nanometer-sized domain using a chemical oxidation polymerization method. For this purpose, at first P4VP chains of (PCMSt-g-P4VP)/TiO 2 nanocomposite were complexed with Cu 2+ ions in toluene as the solvent and then converted to thin film by dip-coatings on a glass slide. Thereafter PPy was selectively synthesized in the P4VP core containing Cu 2+ ions, by soaking the thin film in methanol solutions of pyrrole monomers. The synthesized templated PPy species were studied using scanning electron microscopy and Fourier-transform infrared spectroscopy. The optical properties of the products were obtained using UV-Vis spectroscopy and the electrical conductivity of the samples was measured using samples in which the conductive materials were sandwiched between two Ni electrodes at room temperature. Also, using the electrochemical method, synthesis of PPy onto (PCMSt-g-P4VP)/TiO 2 templates was confirmed under cyclic voltammetric conditions on the surface of the working glassy carbon electrode (GCE).

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Synthesis and characterization of polypyrrole‐platinum composite for use as electrode material

2012

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Synthesis and characterization of polypyrrole (PPy) supported platinum by a simple method is reported in this study. The porous structure of PPy and its tendency for doping with acids prompted us to utilize this property to incorporate platinum by adsorption followed by reduction on the PPy matrix. Dispersed platinum electro catalyst on the conducting PPy support provides favorable reaction site for redox reactions in electrochemical devices such as hydrox fuel cell. The mesoporous matrix of PPy as revealed by FESEM could facilitate effective contact between the reactant gases and electro catalyst. The cauliflower like structure of the PPy matrix could enhance the electrochemical active surface area of the catalyst. The composite material is characterized by cyclic voltammetry (CV), polarization study, four probe technique, density and porosity study. The CV highlights the use of PPy‐Pt hybrid as a capacitor and the Tafel plot infers on the high exchange current density of the hybrid material. POLYM. COMPOS. 2012. © 2012 Society of Plastics Engineers

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Corrosion control of aluminum surfaces by polypyrrole films: influence of electrolyte

Cited by 28 publications

References 23 publications

Electrodeposition of polypyrrole films on aluminum surfaces from a p-toluene sulfonic acid medium

Electrodeposition of polypyrrole films on aluminum surfaces from a p-toluene sulfonic acid medium

Poly(4-Chloromethyl Styrene-g-4-Vinylpyridine)/TiO2 Thin Films as Templates for the Synthesis of Polypyrrole in the Nanometer-Sized Domain

Synthesis and characterization of polypyrrole‐platinum composite for use as electrode material

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