Corrosion protection of copper using polypyrrole electrosynthesised from a salicylate solution

Annibaldi, Valeria; Rooney, A. Denise; Breslin, Carmel B.

doi:10.1016/j.corsci.2012.03.014

Cited by 70 publications

(26 citation statements)

References 45 publications

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“…The EIS diagram of bare copper in 3.5 wt% NaCl solution after 1 h stabilization (Fig.7B inset) is used as a control. The EIS data are presented as Nyquist plots with the experimental data represented by the symbols and the simulated data as continuous traces, which is obtained using the equivalent circuit [34] depicted in the inset of Fig.7B. The simulated data generated using the equivalent circuit is in good agreement with experimental data, which represents a two-time constant model for two merged semicircles at high and low frequencies.…”

Section: Impacts Of Corrosive Time and Film Thickness On 81%pmma-g-gomentioning

confidence: 74%

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A corrosion-protective coating based on a solution-processable polymer-grafted graphene oxide nanocomposite

et al. 2015

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Section: Impacts Of Corrosive Time and Film Thickness On 81%pmma-g-gomentioning

confidence: 74%

“…Organic/polymer coatings [1], oxide layers [2], inhibitors [3], and cathodic protection [4,5] have been widely utilized in marines, pipelines, aerospaces, automobiles, construction industries and so forth. In particular, applying corrosion protective coatings represents an easy and scalable strategy.…”

Section: Introductionmentioning

confidence: 99%

A corrosion-protective coating based on a solution-processable polymer-grafted graphene oxide nanocomposite

et al. 2015

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“…En el caso de i corr los valores son mayores para las muestras recubiertas. La interpretación de estos datos es más complicada ya que la densidad de corriente no puede ser atribuida solamente a la disolución del metal ya que existe una contribución relacionada a la actividad redox del polímero [21,22]. La mejora en la resistencia ante la corrosión también puede ser evaluada mediante la comparación de curvas de polarización en el medio agresivo.…”

Section: Protección Ante La Corrosiónunclassified

Formación electroquímica de películas de polipirrol sobre Nitinol a partir de soluciones de ácido sulfosuccínico

2018

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RESUMENEn este trabajo se estudió la electrosíntesis de polipirrol (PPy) sobre Nitinol a partir de soluciones de ácido sulfosuccínico (0,25 M) y pirrol (0,25 M). El PPy fue formado potenciostáticamente en soluciones de pH 1 y 7. Hasta donde tenemos conocimiento, es la primera vez que se realiza la electrodeposición de PPy en presencia de ácido sulfosuccinico.La morfología de las películas se estudió mediante imágenes de microscopia de barrido electrónico, observándose la típica forma globular del PPy. También se determinó, mediante energía dispersiva de rayos X (EDS), la presencia de S lo cual confirma que el dopante fue incorporado a la matriz polimérica. Las pelícu-las formadas son muy adherentes y presentan una conductividad aceptable.Para poder evaluar el comportamiento ante la corrosión se realizaron diferentes experiencias electroquímicas en solución de Ringer: medición del potencial de circuito abierto, diagramas de Tafel y voltametría de barrido lineal. Si bien ambos recubrimientos mejoran la protección del sustrato, las películas formadas en solución de pH 1 ofrecen mejores resultados. El análisis de iones en solución mediante espectrometría de emisión atómica de plasma acoplado inductivo confirma que las películas son protectoras, evitando la liberación de iones Ni en la solución.Palabras clave: Nitinol, Polipirrol, Acido Sulfosuccínico, Adherencia. ABSTRACTIn this work the electrosynthesis of polypyrrole (PPy) on Nitinol from solutions of sulfosuccinic acid (0,25 M) and pyrrole (0,25 M) was studied. The PPy was formed potentiostatically in solutions of pH 1 and 7. As far as we know, this is the first time that the electrodeposition of PPy is carried out in the presence of sulfosuccinic acid.The morphology of the films was studied by scanning electron microscopy images, observing the typical globular shape of PPy. The presence of S was also determined by X-ray dispersive energy (EDX), confirming that the dopant was incorporated into the polymer matrix. The films formed are very adherent and exhibit acceptable conductivity.In order to evaluate the corrosion behaviour, different electrochemical experiments were performed in Ringer's solution: measurement of open circuit potential, Tafel plots and linear sweep voltammetry. While both coatings improve the protection of the substrate, the films formed in pH 1 solution offer better results. The analysis of ions in solution by inductive coupled plasma atomic emission spectrometry confirms that the films are protective, preventing the release of Ni ions into the solution.

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“…13 CPs are employed in a variety of applications such as sensors and electrochemical devices, 14,15 actuators, 16 capacitors, 17 batteries, 18,19 light emitting diodes, 20,21 control release devices, 22,23 solar cells, 24 radar and electromagnetic interference shielding, 25,26 and corrosion protection of metals and their alloys. [27][28][29][30][31][32][33][34][35] Polyaniline (PAni), polypyrrole (PPy), polythiophene (PT), and their respective derivatives are important CPs which have exhibited promise toward mitigating corrosion. 28,29,36,37 Among these, PPy is the most promising candidate for corrosion protection owing to its good conductivity, high environmental stability in its oxidized form, and low toxicity of pyrrole monomer.…”

Section: Introductionmentioning

confidence: 99%

Tungstate and vanadate-doped polypyrrole/aluminum flake composite coatings for the corrosion protection of aluminum 2024-T3

2015

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Polypyrrole (PPy) doped with either tungstate or vanadate as counter anions was synthesized by chemical oxidative polymerization on the surface of aluminum (Al) flakes. This resulted in the deposition of PPy on the surface of the Al flakes leading to the formation of doped PPy/Al flake composite pigments. These composite pigments were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, conductive-atomic force microscopy, four-point probe conductivity, and X-ray photoelectron spectroscopy. Furthermore, these composites were incorporated in an epoxy-amide binder system in order to formulate a primer for an aluminum 2024-T3 substrate. The coatings were exposed to the Prohesion test conditions and corrosion resistance properties were monitored by electrochemical impedance spectroscopy, DC polarization, galvanic coupling, and scanning electrochemical microscopy measurements. It was found that the doped PPy/Al flake coatings provided sacrificial protection to the underlying aluminum 2024-T3 substrate. Additionally, the release of dopants from PPy backbone resulted in the passivation in the defect areas improving the corrosion protection ability.

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Corrosion protection of copper using polypyrrole electrosynthesised from a salicylate solution

Cited by 70 publications

References 45 publications

A corrosion-protective coating based on a solution-processable polymer-grafted graphene oxide nanocomposite

A corrosion-protective coating based on a solution-processable polymer-grafted graphene oxide nanocomposite

Formación electroquímica de películas de polipirrol sobre Nitinol a partir de soluciones de ácido sulfosuccínico

Tungstate and vanadate-doped polypyrrole/aluminum flake composite coatings for the corrosion protection of aluminum 2024-T3

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