One-step electrochemical synthesis of poly(vinyl pyrrolidone) modified polyaniline coating on stainless steel for high corrosion protection performance

Min-xia, Wang; Hong, Yang; Tan, Keqin; Guo, Ao; Ling, Jingwei; Jiang, Fangfang; Shen, Xixun; Xu, Qing

doi:10.1016/j.porgcoat.2020.105908

Cited by 14 publications

(19 citation statements)

References 44 publications

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“…Distinct from other inert polymer coatings (e.g., silane, epoxy and phenolic resins) [ 34 , 35 , 36 ], the apparent current density for the metal protected by CPs is simultaneously comprised of the charge exchange from the protective layer with electrolyte and the electrochemical corrosion of metal substrates. The analogous results were also reported by Wang et al [ 33 ], who found that PANI-protected 304 stainless steel possessed higher apparent current density than the bare substrate. The elevated apparent current density for the CPs-coated metal may be primarily related to the anodic protection performance of electroactive polymer [ 37 ].…”

Section: Resultssupporting

confidence: 89%

“…In stark contrast, both anodic and cathodic branches for the PPy-I-coated sample shifted to the area of high current density. Moreover, the anodic branch of this curve exhibited the obvious passivation state, which results from the superior interfacial electron mediation capacity of electroactive PPy with intact structure [ 33 ]. Distinct from other inert polymer coatings (e.g., silane, epoxy and phenolic resins) [ 34 , 35 , 36 ], the apparent current density for the metal protected by CPs is simultaneously comprised of the charge exchange from the protective layer with electrolyte and the electrochemical corrosion of metal substrates.…”

Section: Resultsmentioning

confidence: 99%

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Optimized Anticorrosion of Polypyrrole Coating by Inverted-Electrode Strategy: Experimental and Molecular Dynamics Investigations

et al. 2022

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To improve the poor adhesion and the ensuing insufficient anticorrosion efficacy of electropolymerized polypyrrole (PPy) on copper surface, an inverted-electrode strategy was applied after the passivation procedure, for which the compact coating (PPy-I) was deposited on the substrate in a cathodic window. Morphological and physical characterizations revealed that PPy-I exerted satisfactory adhesion strength and suitable thickness and conductivity compared with the analogue prepared via the traditional protocol (PPy-T). Potentiodynamic polarization, electrochemical impedance spectroscopy and frequency modulation were employed to ascertain the propitious protection of PPy-I for copper in artificial seawater (ASW). Due to the dominant electroactivity, the PPy-I-coated sample possessed higher apparent current density and lower charge transfer resistance than its PPy-T-protected counterpart, which maintained the passivation of the substrate. Surface analysis also supported the viability of PPy-I for copper in ASW for a well-protected surface with inferior water wettability. Molecular dynamics simulations evidenced that PPy-I with the higher density retained efficient anticorrosion capacity on copper at elevated temperatures. Therein, the derived time-dependent spatial diffusion trajectories of ions were locally confined with low diffusion coefficients. Highly twisted pore passages and anodic protection behavior arising respectively from the tight coating architecture and electroactivity contributed to the adequate corrosion resistance of PPy-I-coated copper.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Optimized Anticorrosion of Polypyrrole Coating by Inverted-Electrode Strategy: Experimental and Molecular Dynamics Investigations

et al. 2022

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“…[16][17][18][19] Furthermore, those conductive nanoparticles and related materials (e.g., composites or nanocomposites) were reported in different applications including sensors and actuators devices, scaffolds for tissue engineering, corrosion protection, photocatalysis, and so on. [20][21][22][23][24][25] The aim of this work is to show a simple, novel, and reproducible approach for the obtention of Pickering emulsions employing two different organic solvents (1-octanol and cyclohexane) and water-dispersible PANI-NP as the organic and aqueous phase, respectively. First, electroactive PANI-NP stabilized using polyvinylpyrrolidone (PVP) were employed to obtain emulsions as structures in the micrometric range.…”

Section: Introductionmentioning

confidence: 99%

“…A series of toxicity assays revealed that is possible the application of PANI‐NP in biological systems 16–19 . Furthermore, those conductive nanoparticles and related materials (e.g., composites or nanocomposites) were reported in different applications including sensors and actuators devices, scaffolds for tissue engineering, corrosion protection, photocatalysis, and so on 20–25 …”

Section: Introductionmentioning

confidence: 99%

Pickering emulsions stabilized with PANI‐NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation

Abel

Molina

Rivarola

et al. 2021

J of Applied Polymer Sci

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Micrometric Pickering emulsions in 1-octanol or cyclohexane were stabilized with water-dispersible electroactive polyaniline nanoparticles (PANI-NP). The emulsions were characterized by optical and electronic microscopy as well as spectroscopic techniques. It was demonstrated that nanoparticles maintain their functional properties (e.g., pH sensitivity and electromagnetic absorption) in the emulsion. Furthermore, as a proof of concept, smart Pickering emulsions employing PANI-NP stabilized with a thermosensitive polymer (PNIPAM) were obtained. The thermal behavior of the obtained structures was evaluated by turbidimetric techniques and an IR camera. The thermoresponsive emulsions have shown an important increment of the local temperature (>12 C) under radiofrequency (RF) irradiation. Phase transition of PNIPAM induced by heating or RF absorption provokes the breaking of the emulsions. In this context, the proposed systems herein could induce endothermal reactions carried out in organic solvents. Besides, Pickering emulsions formed by using electroactive PANI-NP could be applied in several medical or industrial applications.

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“…In corrosion protection applications, the PANI film has shown promising potential in protecting active metals such as iron by acting as physical barrier coatings, as a primer layer and as component in a multi-layer coating system [5] . The PANI has an excellent potential to replace the toxic metal, such as chromates, in corrosion protection and is considered a green anti-corrosion candidate [5] , [6] , [7] . The electrochemical synthesis of PANI coatings on active metals is accomplished by the dissolution of the metal at a potential lower than the monomer oxidation potential [8] , [9] .…”

mentioning

confidence: 99%

Dataset for the selection of electrolytes for Electropolymerization of aniline

et al. 2021

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The most investigated conducting polymer (CP) is polyaniline (PANI)), a promising polymer due to its excellent environmental stability, simplicity of synthesis, and high electrical conductivity [1] , [2] , [3] , [4] . In corrosion protection applications, the PANI film has shown promising potential in protecting active metals such as iron by acting as physical barrier coatings, as a primer layer and as component in a multi-layer coating system [5] . The PANI has an excellent potential to replace the toxic metal, such as chromates, in corrosion protection and is considered a green anti-corrosion candidate [5] , [6] , [7] . The electrochemical synthesis of PANI coatings on active metals is accomplished by the dissolution of the metal at a potential lower than the monomer oxidation potential [8] , [9] . Therefore, electrochemical synthesis of PANI coatings on active metal requires a proper choice of the electrolyte and solvent that should strongly passivate the metal without hindering the electropolymerization process [10] , [11] . The data reported here are obtained while the anodic polarization of mild steel (MS) is carried out in succinic acid, sulphanilic acid, sodium orthophosphate, sodium potassium tartrate (Na-K tartrate), and benzoic acid in 3:1 alcohol-water (BAW) solutions [11] . However, the results of electrolytes sodium-potassium tartrate (Na-K tartrate) and benzoic acid in alcohol-water (BAW) are reported for the polymerization of aniline onto MS [11] . The SEM image of MS sample polarized in 0.3 M oxalic acid solution and 0.1 M aniline in 0.3 M oxalic acid is reported as a dataset or a supplementary material of the main manuscript ‘The Effect of Electrolytes on the Coating of Polyaniline on Mild Steel by Electrochemical Methods and Its Corrosion Behaviour [11] .’

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One-step electrochemical synthesis of poly(vinyl pyrrolidone) modified polyaniline coating on stainless steel for high corrosion protection performance

Cited by 14 publications

References 44 publications

Optimized Anticorrosion of Polypyrrole Coating by Inverted-Electrode Strategy: Experimental and Molecular Dynamics Investigations

Optimized Anticorrosion of Polypyrrole Coating by Inverted-Electrode Strategy: Experimental and Molecular Dynamics Investigations

Pickering emulsions stabilized with PANI‐NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation

Dataset for the selection of electrolytes for Electropolymerization of aniline

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