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

Kalendová, Andréa; Vesely, David L.; Kohl, Miroslav; Stejskal, Jaroslav

doi:10.1016/j.porgcoat.2014.10.009

Cited by 73 publications

(38 citation statements)

References 33 publications

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“…3,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Some proven systems employed for this purpose include Znbased coatings for steel and Mg-based and Al-based coatings for aluminum alloys. 3,[14][15][16][18][19][20][21][22][23][24][25][26][27][28][29] All of these systems function primarily by galvanic coupling of the anodic metal pigments to another material in order to suppress corrosion degradation. The performance of the galvanic couple is influenced by pH, metal ion concentration, pigment passivation, pigment composition, and ionic strength.…”

Section: Resultsmentioning

confidence: 99%

Utilization of chemical stability diagrams for improved understanding of electrochemical systems: evolution of solution chemistry towards equilibrium

2018

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Predicting the stability of chemical compounds as a function of solution chemistry is crucial towards understanding the electrochemical characteristics of materials in real-world applications. There are several commonly considered factors that affect the stability of a chemical compound, such as metal ion concentration, mixtures of ion concentrations, pH, buffering agents, complexation agents, and temperature. Chemical stability diagrams graphically describe the relative stabilities of chemical compounds, ions, and complexes of a single element as a function of bulk solution chemistry (pH and metal ion concentration) and also describe how solution chemistry changes upon the thermodynamically driven dissolution of a species into solution as the system progresses towards equilibrium. Herein, we set forth a framework for constructing chemical stability diagrams, as well as their application to Mg-based and Mg-Zn-based protective coatings and lightweight Mg-Li alloys. These systems are analyzed to demonstrate the effects of solution chemistry, alloy composition, and environmental conditions on the stability of chemical compounds pertinent to chemical protection. New expressions and procedures are developed for predicting the final thermodynamic equilibrium between dissolved metal ions, protons, hydroxyl ions and their oxides/hydroxides for metal-based aqueous systems, including those involving more than one element. The effect of initial solution chemistry, buffering agents, complexation agents, and binary alloy composition on the final equilibrium state of a dissolving system are described by mathematical expressions developed here. This work establishes a foundation for developing and using chemical stability diagrams for experimental design, data interpretation, and material development in corroding systems.

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Section: Resultsmentioning

confidence: 99%

Utilization of chemical stability diagrams for improved understanding of electrochemical systems: evolution of solution chemistry towards equilibrium

2018

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“…SEM images of the morphology of corrosion products were obtained by Quanta FEG 250 (FEI). The XRD spectroscopy patterns were tested at a scan range of 2q from 20 to 65 via a D8 DISCOVER diffractometer (Germany).…”

Section: Characterizationsmentioning

confidence: 99%

“…18 Although it can provide some shielding protection, it leads to the rapid failure of the coating due to the decrease of the connection among the zinc particles. [19][20][21][22] Zinc-rich coatings have been largely limited in application via their high porosity, heavy weight and poor environmental protection. Therefore, reducing the amount of zinc powder or increasing the rate of cathodic protection has become an important research direction in the development of new zinc-rich coatings.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosive behavior of a zinc-rich epoxy coating containing sulfonated polyaniline in 3.5% NaCl solution

Yang

Liu

et al. 2018

RSC Adv.

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An epoxy zinc-rich composite coating containing self-doped conducting sulfonated polyaniline (SPANi) nanofiber was prepared and the corrosion resistance of as-prepared coatings on Q235 substrate studied by open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Results suggested that a zinc-rich coating with addition of 1.0 wt% SPANi could enhance the cathodic protection time and barrier performance. To study corrosion diffusion, artificial scratch and adhesion strength were investigated via the salt spray test and pull-off test, respectively. Finally, the passivating action of coatings was demonstrated by analyses of corrosion products via X-ray diffraction spectroscopy.

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“…Z hľadiska ochrany je rozhodujúca difúzia korózneho prostredia do povlaku, zmena štruktúry povlaku, vyvolaná absorbčnými a difúznymi procesmi a hrúbka povlaku. Podobne ako u iných náterov je, aj v tomto prípade, účinnosť ich ochrany závislá na kvalite povrchu základného materiálu, ktorá musí zabezpečiť jeho dobrú ochranu pred koróziou [3][4][5][6][7].…”

Section: úVodunclassified

Evaluation of corrosion resistance of powder coatings after various surface chemical pre-treatment

Draganovská

Brezinová

2017

Koroze a Ochrana Materialu

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The surface treatment by a powder coating is one of the progressive technologies. Such coatings are resistant to corrosion and mechanical wearing. The quality of surface protection is affected primarily by a layer pre-treatment, the type of surface tretment, the system selection and the method and quality of application. Taking into account all the surface pre-tretment methods, the chemical pre-modification is a leading method. One of the methods is pre-treatment using a conversion coating which was developed on the nanotechnology basis - BONDRITE NT. That non-phosphate chemical pre-treatment is utilized at a surrounding temperature. It creates nano-ceramic protective layer on steel, zinc and aluminium surfaces, and as the result the coating has a significant adhesion. In the paper, the possibilities for the improvement of corrosion resistance of powder coatings using the subject conversion coating are presented at the current pasivation of respective surface.

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

Cited by 73 publications

References 33 publications

Utilization of chemical stability diagrams for improved understanding of electrochemical systems: evolution of solution chemistry towards equilibrium

Utilization of chemical stability diagrams for improved understanding of electrochemical systems: evolution of solution chemistry towards equilibrium

Anticorrosive behavior of a zinc-rich epoxy coating containing sulfonated polyaniline in 3.5% NaCl solution

Evaluation of corrosion resistance of powder coatings after various surface chemical pre-treatment

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