Partial replacement of metallic zinc dust in heavy duty protective coatings by conducting polymer

Armelín, Elaine; Martí, Mireia; Liesa, Francisco; Iribarren, José I.; Alemán, Carlos

doi:10.1016/j.porgcoat.2010.04.023

Cited by 66 publications

(31 citation statements)

References 25 publications

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“…Efforts to substitute zinc in coating materials with other pigments exist, mainly for financial as well as environmental reasons [11]. Research aimed at replacing zinc with more suitable materials focuses mainly on combinations of conducting polymers, inorganic pigments, fillers and zinc with different particle shapes [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Anticorrosion efficiency of zinc-filled epoxy coatings containing conducting polymers and pigments

Kalendová

Vesely

Kohl

et al. 2015

Progress in Organic Coatings

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Section: Introductionmentioning

confidence: 99%

“…Research aimed at replacing zinc with more suitable materials focuses mainly on combinations of conducting polymers, inorganic pigments, fillers and zinc with different particle shapes [11,12]. Carbon and graphite-based pigments represent another solution [13].…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion efficiency of zinc-filled epoxy coatings containing conducting polymers and pigments

Kalendová

Vesely

Kohl

et al. 2015

Progress in Organic Coatings

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“…Combination of the ICPs with sacrificial metallic grains is to retain galvanic function and reduce electrolytic conductivity of the ZRPs in the form of using stand-alone ICPs [9] or composited primers [10]. To amend inefficient mechanical blockage of conventional ZRPs [11] and to improve zinc-rich powder coatings [12], intrinsically conducting polymers (ICPs) have been successfully used as mild inhibitor agents to advance corrosion resistance of hybrid paints over ICP-free coatings. Further development was achieved by physical mixture of organic particles and inorganic pigments, but the idea to attain valuable improvement of galvanic protecting organic coatings relies on the formulation of hybrid paints containing highly dispersed particle supported ICPs along with the active anodic metallic pigments.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection with zinc-rich epoxy paint coatings embedded with various amounts of highly dispersed polypyrrole-deposited alumina monohydrate particles

Gergely

Bertóti

Törók

et al. 2013

Progress in Organic Coatings

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Active anodic zinc content below 90 wt.% does not support sufficient electrical contacts but higher contents cause high porosity of traditional liquid zinc-rich paints (ZRPs). To resolve this problem, our proposal is the application of highly dispersed polypyrrole (PPy) coated alumina inhibitor particles (PCAIPs) in zinc-rich paint compositions. Using these nano-size inhibitor particles at concentrations from 4.55 to 0.85 wt.%, hybrid paints were formulated with zinc contents ranging from 60 to 85 wt.% at the same time. Submicron morphology and nano-scale structure, spectroscopy characteristics and electrochemical properties of the PCAIPs were studied by transmission electron microscopy (TEM) and rheology, Fourier-transform infrared spectroscopy (FT-IR) and cyclic voltammetry (CV) in first part of the work. In the second part, electrolytic corrosion resistivity of two sets of paint coatings were salt-spray chamber and immersion tested with 5 wt.% aqueous solution of sodium chloride. Active corrosion prevention ability of the saltspray tested coatings was evaluated in compliance with ISO recommendations. Dielectric properties of the coatings during the immersion tests were monitored by electrochemical impedance spectroscopy (EIS). Corrosion tested area of the coatings was investigated by glowdischarge optical emission spectroscopy (GD-OES) to disclose infiltration of corrosive analytes and oxygen enrichment in the cross-section of the primers in comparison with their pristine states. Morphology of the zinc pigments was examined by scanning electron microscopy (SEM), and quality of steel specimens and the interfacial binder residues by X-ray photoelectron spectroscopy (XPS) as well as FT-Raman and Mössbauer spectroscopy. The results of both types of corrosion tests evidenced efficient utilisation of sacrificial anodic current for galvanic protection and improved barrier profile of the hybrid coatings, along with the PCAIP inhibited moderate selfcorrosion of zinc. As a result of well balanced active/passive function, the hybrid coating 2 containing zinc at 80 wt.% and PCAIPs at 1.75 wt.% embedding PPy at 0.056 wt.% indicated the most advanced corrosion prevention. Galvanic function of the hybrid paints is interpreted on the basis of size-range effect and spatial distribution of the alumina supported PPy inhibitor particles and basic electrical percolation model considerations.

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“…In addition, protection stability is impaired by early deadhesion recognized as cohesive failure of the binder 10 referred to as cathodic delamination. Carbon black is an electrically conductive auxiliary particle in zinc‐rich coatings 11, 12 whereas polyaniline had additional function so as to inhibit zinc corrosion 13. The concept of hybrid coatings proved to be very viable 14.…”

Section: Introductionmentioning

confidence: 99%

Novel zinc‐rich epoxy paint coatings with hydrated alumina and carbon nanotubes supported polypyrrole for corrosion protection of low carbon steel: Part II: Corrosion prevention behavior of the hybrid paint coatings

Gergely

Pászti

Bertóti

et al. 2012

Materials & Corrosion

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Utilization of various types of multi‐walled carbon nanotubes (MWCNTs) in zinc‐rich paints (ZRPs) is presented addressing percolation and porosity related phenomena of traditional ZRPs. Hybrid paint coatings were formulated with 3.21 wt% polypyrrole (PPy) deposited alumina‐MWCNT inhibitor particles (PDAMIPs) and 70 wt% zinc contents. Corrosion protection behavior of the hybrid coatings was investigated by electrochemical impedance spectroscopy (EIS), glow‐discharge optical emission spectroscopy (GD OES), X‐ray photoelectron spectroscopy (XPS), and FT‐Raman spectroscopy. Immersion and salt‐spray chamber tests gave evidence of improved galvanic protection and barrier nature of the hybrid coatings over the conventional ZRPs, whereas inhibited zinc corrosion and ignorable steel corrosion took place besides lower degradation of the binder. Zinc‐rich hybrid paints with either high relative amount of polyelectrolyte‐modified or low proportion of functionalized MWCNTs afforded enhanced corrosion prevention. This result is partly attributed to the nanotube volume fractions around the threshold of infinite cluster formation contributing to electrical percolation and galvanic action of the hybrids. Experimental results are discussed in a broader context on the basis of structure related findings of the PDAMIPs (described in Part I) and in the light of recent literature data. From the newly developed inhibitor particles, some of them are respected as worthy additives for application in hybrid coatings featuring high performance corrosion prevention functionality.

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Partial replacement of metallic zinc dust in heavy duty protective coatings by conducting polymer

Cited by 66 publications

References 25 publications

Anticorrosion efficiency of zinc-filled epoxy coatings containing conducting polymers and pigments

Anticorrosion efficiency of zinc-filled epoxy coatings containing conducting polymers and pigments

Corrosion protection with zinc-rich epoxy paint coatings embedded with various amounts of highly dispersed polypyrrole-deposited alumina monohydrate particles

Novel zinc‐rich epoxy paint coatings with hydrated alumina and carbon nanotubes supported polypyrrole for corrosion protection of low carbon steel: Part II: Corrosion prevention behavior of the hybrid paint coatings

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