Corrosion protection with polyaniline and polypyrrole as anticorrosive additives for epoxy paint

Armelín, Elaine; Pla, Rosa; Liesa, Francisco; Ramis, Xavier; Iribarren, José I.; Alemán, Carlos

doi:10.1016/j.corsci.2007.10.006

Cited by 253 publications

(120 citation statements)

References 32 publications

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“…The effect of the addition of P3TMA (1%) in the paint formulation was also noticed by pull-off test (Figure 10). The tensile strength obtained for samples in dry state is much higher than the sample with 3V nanocoating, corroborating to the idea that conducting polymers also can actuate as adhesion promoters [26][27][28][29][30]. However, this effect was lost over time in the wet samples, where the adhesion reduction was almost the same than panels coated with 3V/epoxy bilayer system (15% and 16.7%, respectively).…”

Section: Adhesion Measurementssupporting

confidence: 61%

“…In order to improve the previous results with AA2024 alloy, two further approaches were investigated: (i) the incorporation of EDTPO to the VTMS/TEOS sol-gel formulation and (ii) the incorporation of a conducting polymer to the epoxy paint. Since the advantage combination of the use of conducting polymers (CPs), as anticorrosive additive, with organic coatings has granted the improvement of corrosion protection of metals [26][27][28][29][30], accordingly, we incorporated a soluble semiconducting polythiophene derivative (P3TMA) to the epoxy paint formulation in order to evaluate its influence to the adhesion between the sol-gel inner nanocoating and the epoxy outer coating.…”

Section: Introductionmentioning

confidence: 99%

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The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy

Dalmoro

Alemán

Ferreira

et al. 2015

Progress in Organic Coatings

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In the present study we compared the beneficial effect on the incorporation of modified silane nanocoating and conducting polymer additive to the adhesion and protection of aluminium surface with epoxy coating. Results proved that the protection imparted by the silane coating, suitably modified with phosphonic groups, showed an excellent adhesion to the metallic substrate as well as good adherence with the epoxy outer layer, which result in an improved corrosion resistance. The incorporation of 1% of poly (3-methyl thiophene acetate) (P3TMA) also improved the adhesion force of the epoxy paint adhered to the aluminium surface. However, the adhesion force decreased with the increase of the immersion time in NaCl 3.5% solution. In conclusion, both bilayer systems [vinyltrimethoxysilane (VTMS)/tetraethylorthosilicate (TEOS) and VTMS/TEOS/ ethylenediaminetetra(methylene phosphonic acid) (EDTPO)] and also the employment of P3TMA in the epoxy coating showed better results in accelerated corrosion assays, i.e. very low blistering formation was observed, compared with control samples based in a monolayer coating directly adhered to the aluminium surface.

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Section: Adhesion Measurementssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy

Dalmoro

Alemán

Ferreira

et al. 2015

Progress in Organic Coatings

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“…Examples of conductive polymers include polypyrrole and polyaniline, involving systems of conjugated double bonds with the presence of charge carriers making possible charge transfer along the chain [9]. Owing to their properties, conductive polymers induce passivation processes on steel surfaces, in which respect they are similar to the compounds containing heavy metals.…”

Section: Introductionmentioning

confidence: 99%

The anticorrosion properties of pigments based on molybdates and tungstates surface-modified with conducting polymers

Hájková

Kalendová

2017

Koroze a Ochrana Materialu

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The objective of this work was to examine the properties of molybdate or tungstate based pigments whose surface has been coated with a conductive polymer, viz. either polyaniline phosphate (PANI) or polypyrrole phosphate (PPY), if used as pigments in organic coating materials. The anticorrosion pigments were prepared by high-temperature solid-state synthesis from the respective oxides, carbonates. The composite pigments (pigment/conductive polymer) were dispersed in a solvent-type epoxy-ester resin binder to obtain a series of paints whose anticorrosion properties were assessed by means of corrosion tests in accelerated corrosion test and by the linear polarisation method. Focus was on the anticorrosion properties of the paints depending on the pigment surface treatment, initial pigment composition, and pigment volume concentration (PVC) in the paint. The surface-treated pigment particles were expected to have a favourable effect on the anticorrosion and the mechanical properties of epoxy-ester resin based paints.

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“…[1][2][3][4] Among these materials, polyaniline (PAni) is particularly interesting because of its high chemical and environmental stabilities, remarkable electrical conductivity in the doped state, easy processability, and low cost. Thus, in the last few years PAni has been successfully used for a wide variety of applications: anticorrosive additive for organic coatings, 5,6 solid state ion-selective electrodes, 7 electrochromic devices for optical displays, 8,9 chemical sensors and biosensors, 10,11 electrochemical capacitors, 12,13 and ionselective membranes for electrodialysis. [14][15][16][17] Electrodialysis with ion-selective membranes is an advanced separation technology that is currently used in different fields: concentration of seawater to produce edible salt, desalination of saline water, separation of ionic materials from nonionic materials, recovery of metal ions contained in the effluents produced by the galvanic industry, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Transport of Metallic Ions through Polyaniline-Containing Composite Membranes

et al. 2010

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The extraction of Na + , Ni 2+ , and Cr 3+ using six different membranes made of polyaniline composited with high-impact polystyrene, which differ in the doping agent and/or the preparation method, has been investigated. The swelling and ion-exchange capacities of the six polyaniline composited with high-impact polysterene (HIPS/PAni) membranes have been determined and compared with that of the commercial Selemion membrane. Electrodialysis tests using a five-compartment cell evidenced that the extraction of ions depends on the electronic structure of the SO 3 -groups, which is modulated by the doping agent, and on both microstructure and electrical resistance of the membrane, which are regulated by the preparation method. The transport of ions through HIPS/PAni and Selemion membranes was found to be comparable. Quantum mechanical calculations on model complexes have been performed to characterize the electronic structure of the dopants. Results indicate that the strength of the interaction between the different doping agents and the polyaniline is inversely proportional to the concentration of negative charge in the SO 3 -group of the former. Moreover, both the binding energy and the distribution of charges calculated for dopant · · · PAni complexes have been compared with those predicted for dopant · · · metallic ion complexes.

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Corrosion protection with polyaniline and polypyrrole as anticorrosive additives for epoxy paint

Cited by 253 publications

References 32 publications

The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy

The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy

The anticorrosion properties of pigments based on molybdates and tungstates surface-modified with conducting polymers

Transport of Metallic Ions through Polyaniline-Containing Composite Membranes

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