Corrosion of conductive polypyrrole: Galvanic interactions between polypyrrole and metal substrates

Qi, Kai; Qiu, Yubing; Chen, Zhenyu; Guo, Xingpeng

doi:10.1016/j.corsci.2014.11.025

Cited by 21 publications

(10 citation statements)

References 30 publications

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“…The dopant level can be assessed in order to give quantitative and qualitative interpretation of the conductive species in the polymer structure. [8,9] Such findings have been reported by Wang et al [10] and Qi et al [11] for PPy films correlating their chemical groups with their corrosion resistance in nonphysiological electrolytes. Aiming at expanding the current knowledge, in the present work, we investigate the effect of the surface chemistry of electropolymerized PPy films on the corrosion behavior of ISO 5832-1 surgical stainless steel samples in physiological solution.…”

Section: Introductionsupporting

confidence: 64%

Exploring the relationship between the surface chemistry and the corrosion behavior of electropolymerized polypyrrole films deposited on the surgical ISO 5832‐1 stainless steel

Nascimento

Santos

Venâncio

et al. 2020

Surface & Interface Analysis

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In the present work, electropolymerized polypyrrole (PPy) films were obtained on the surface of the surgical ISO 5832‐1 stainless steel. The films were obtained from solutions containing 0.1M and 0.5M of the monomer by cyclic voltammetry deposition. The correlation between the surface chemistry of the as‐deposited films and the corrosion behavior of the coated substrate is explored. X‐ray photoelectron spectroscopy was used to study the chemical state of the main elements in the PPy films. Electrochemical impedance spectroscopy and potentiodynamic polarization tests were employed to evaluate the corrosion resistance of the PPy‐coated samples. The tests were conducted in phosphate‐buffered saline solution at 37°C. The measured corrosion current densities were dependent on the doping level of the PPy film and decreased with the reduction of the doping level of the PPy layer.

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Section: Introductionsupporting

confidence: 64%

Exploring the relationship between the surface chemistry and the corrosion behavior of electropolymerized polypyrrole films deposited on the surgical ISO 5832‐1 stainless steel

Nascimento

Santos

Venâncio

et al. 2020

Surface & Interface Analysis

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show abstract

“…37 For PPy product, when heating from 200℃ to about 570℃, the mass fraction decreased gradually which was caused by the dissociation of the SO 4 2absorbed on PPy. During the temperature increasing to 200℃,the weight loss of products resulted from the volatilization of absorbed water.…”

Section: Physical Chemistry Chemical Physics Accepted Manuscriptmentioning

confidence: 99%

Self-catalytic polymerization of a water-soluble selenium/polypyrrole nanocomposite and its nonlinear optical properties

Zhang

et al. 2015

Phys. Chem. Chem. Phys.

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A facile one-step method for the synthesis of a water-soluble selenium/polypyrrole (Se/PPy) nanocomposite was developed. In the aqueous synthesis process, the pyrrole acted as a reductant for the reduction of H2SeO3, and then the elemental Se formed in situ acted as a catalyst for the polymerization of pyrrole. The characterization results show that the as-obtained composite (Se/PPy) is a spherical (Φ80 nm) product that is made up of amorphous Se particles coated by PPy layers. The formation mechanism and influence factors of the products were discussed, based on a series of experiments. It is proposed that remainder H2SeO3 adsorbed on the PPy chains increased the water-solubility and conductivity of the Se/PPy nanocomposite. Significantly, relying on the synergistic effect of photo-conductive Se nanoparticles and electric-conductive PPy molecules, the Se/PPy nanocomposite possesses a large two-photon absorption (2PA) cross-section and good optical limiting properties, which were demonstrated by the Z-scan technique using a femtosecond laser. We believe that this work should be an interesting strategy for developing polymer composites with excellent optoelectrical properties.

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“…In addition, the PPy has the ability to change its oxidation state, depending on the characteristics of the medium. This behavior allows to create a passive layer on the surface of the metal, reduce the corrosion reaction rate and improve the corrosion protection of the metal (Castagno et al, 2011;Gergely et al, 2011;González and Saidman, 2012;Qi et al, 2015;Jiang et al, 2019). The PPy can be obtained by several techniques and one of the most used is the chemical oxidation of the pyrrole in the presence of stabilizers for the production of an aqueous dispersion (Ramôa et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole Modified E-Coat Paint for Corrosion Protection of Aluminum AA1200

et al. 2020

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This article reports the potential use of Polypyrrole (PPy) particles as anticorrosive additive on an epoxy water-based paint to increase the corrosion protective property of aluminum-coated panels. AA1200 aluminum panels were painted using the electrophoretic deposition method and the coatings with different concentrations of PPy particles were tested. PPy particles were synthetized by oxidative polymerization of pyrrole (Py) with iron (III) chloride hexahydrate (FeCl 3 .6H 2 O) in the presence of dodecylbenzenesulfonic acid (DBSA). Electrically conducting PPy particles (6.5 S cm −1) were obtained with a size average of 154 nm. The as-prepared PPy particles were added into a water-based epoxy paint and AA1200 panels were coated via electrophoretic deposition method. The corrosion protective properties of e-coated AA1200 panels were evaluated by means of electrochemical impedance spectroscopy over prolonged exposure time in neutral non-aerated 0.1 M sodium chloride NaCl electrolyte. In particular, the addition of 0.4% by weight PPy has improved the coating corrosion protective property with respect to epoxy clearcoat and exhibited the highest value of impedance modulus at low frequency among the studied coatings.

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Corrosion of conductive polypyrrole: Galvanic interactions between polypyrrole and metal substrates

Cited by 21 publications

References 30 publications

Exploring the relationship between the surface chemistry and the corrosion behavior of electropolymerized polypyrrole films deposited on the surgical ISO 5832‐1 stainless steel

Exploring the relationship between the surface chemistry and the corrosion behavior of electropolymerized polypyrrole films deposited on the surgical ISO 5832‐1 stainless steel

Self-catalytic polymerization of a water-soluble selenium/polypyrrole nanocomposite and its nonlinear optical properties

Polypyrrole Modified E-Coat Paint for Corrosion Protection of Aluminum AA1200

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