Metal Filled Composites as Protective Coatings Against Marine Corrosion

Kouloumbi, N.; Tsangaris, G.M.; Kyvelidis, S.

doi:10.1533/9781845698768.181

Cited by 4 publications

(9 citation statements)

References 4 publications

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“…Thus, considering that the water distribution is uniform, System 2 leads a larger substrate area in contact with electrolyte at a given exposure period. The controlled electrolyte arrival at the metallic substrate throughout the film allows the corrosion process to develop slowly under the coating, generating thin layers (high specific capacitance [1] ) of corrosion products that cause adhesion loss (delamination). Those delaminated areas are placed in parallel with the undelaminated ones; thus, (1) A 0.5-µm thick oxide layer having ε r = 5 gives C = 8.8 nF/cm 2 .…”

Section: Figure 10mentioning

confidence: 99%

“…Approximately 40% of zinc consumption in the world corresponds to protection measures against steel corrosion. 1 The combination of a zinc layer with an organic coating (duplex system) acts synergistically (i.e., its behavior is better than the sum of the protective properties of each coat applied separately). 2 The first approach to characterizing the protecting properties of these duplex systems was to expose test samples to different atmospheres until macroscopic degradation was observed.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Impedance Spectroscopy Study of the Corrosion Process on Coated Galvanized Steel in a Salt Spray Fog Chamber

Pérez¹,

Collazo²,

Izquierdo³

et al. 2000

CORROSION

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The behavior of three different paint systems was investigated using the electrochemical impedance spectroscopy (EIS) technique. The coatings, based on chlorinated rubber, alkyd resin, and waterborne acrylic resin, were applied on galvanized steel and exposed in a salt spray fog chamber (SSFC) according to ASTM B117. The evolution of the impedance spectra over exposure time allowed a comparison to be made among the barrier properties of the three tested paints. In all cases, the number of time constants in the impedance spectra increased with exposure time, which was related to the development of different processes at the metal/coating interface. The accumulation of zinc corrosion products at the zinc/coating interface and/or oxygen diffusion throughout those deposits and the paint film were considered the physical phenomena responsible for the observed time constants. The corrosion products were characterized by scanning electron microscopy (SEM) with energy dispersive spectrometry (EDS) and x-ray diffraction (XRD) techniques. The main corrosion product characterized was simonkolleite, Zn 5 (OH) 8 Cl 2 ·H 2 O.

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Section: Figure 10mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy Study of the Corrosion Process on Coated Galvanized Steel in a Salt Spray Fog Chamber

Pérez¹,

Collazo²,

Izquierdo³

et al. 2000

CORROSION

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“…Kim et al studied the effect of Al, Fe, and Si metal powders in a polymer film to produce a shielding effect from electromagnetic waves [10]. Improvement in mechanical properties via embedment of these metallic powders and others in the matrix was also reported by various researchers worldwide [4][5][6][7][8][9][10][11][12][13]. In general, these metallic additives in the coating alter the coating's conductive behavior and dielectric property, inhibit the diffusion of moisture, and provide protection by acting as a barrier coat, inhibiting agent, or sacrificial anode [13].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance Synergistic Appraisal of Titanium-Impregnated Bisphenol A-Type Epoxy Duplex Coating System in Stimulated and Natural Marine Environments of Southeastern Coastal Area of China–Pakistan Economic Corridor

Jamil

Bano

Malshe

et al. 2021

Advances in Polymer Technology

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This research endeavor is aimed at developing a protective coating for marine service conditions of the southeastern coastal area of the China–Pakistan Economic Corridor. Bisphenol A-type epoxy-based protective coatings were prepared by impregnating exotic titanium metal microparticles into two different proportions, i.e., 5% and 10% ( w / w ). Film hardness measurement by pencil test, adhesion measurement by the crosshatch-tape test, chemical and heat resistance test, gloss measurement, natural exposure, and salt spray testing have demonstrated that Ti-enriched coatings have performed better than the virgin epoxy coating. Moreover, scanning electron microscopy has depicted more surface degradation. Fourier transform infrared spectroscopy has indicated higher mass loss and chain scission in the virgin epoxy coating than the Ti-enriched coatings. In addition, these Ti microparticles have filled up the cavities/imperfections, reduced cracking, promoted crosslinking during the curing, and cordoned-off passage of corrodents and moisture, thus improving epoxy resin coating features. These results have widened the scope of Ti-embedded epoxy coatings against atmospheric corrosion for highly corrosive marine sites.

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“…Data concerning the protective action of particulate polymeric coatings justify the excellent barrier protection that zinc-rich coatings offer [14][15][16] and demonstrate that composites with metal fillers (Fe, Al, Zn) exhibit similar [17] or slightly lower [18] protective properties than that of pure epoxy coatings.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the behaviour of particulate polymeric coatings in a corrosive environment. Influence of the concentration of metal particles

Kouloumbi

Tsangaris

Skordos

et al. 1996

Progress in Organic Coatings

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In this work pretreated steel specimens were coated by a spinning process with particulate polymeric composites consisting of an epoxy resin (DOW 33 1) and iron powder. Applied coatings were roughly 70 pm thick and the contained quantity of iron particles was varied (7.5, 15,30% wt./wt.). The effect of the presence of iron particles in the coatings as well as the influence of their concentration on the evaluation of the coatings' behaviour in a corrosive environment (3.5% NaCl) was studied. Electrochemical impedance spectroscopy, corrosion potential, corrosion current density (Tafel) and dielectric measurements were performed. Minor differences in the anticorrosive behaviour of the coatings were observed irrespective of the iron content in the coating. Effective resistance inhibition action of the composite coatings was diminished with the increase of exposure time to the corrosive environment being in all cases very close to that of the pure epoxy resin coatings.

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Metal Filled Composites as Protective Coatings Against Marine Corrosion

Cited by 4 publications

References 4 publications

Electrochemical Impedance Spectroscopy Study of the Corrosion Process on Coated Galvanized Steel in a Salt Spray Fog Chamber

Electrochemical Impedance Spectroscopy Study of the Corrosion Process on Coated Galvanized Steel in a Salt Spray Fog Chamber

Corrosion Resistance Synergistic Appraisal of Titanium-Impregnated Bisphenol A-Type Epoxy Duplex Coating System in Stimulated and Natural Marine Environments of Southeastern Coastal Area of China–Pakistan Economic Corridor

Evaluation of the behaviour of particulate polymeric coatings in a corrosive environment. Influence of the concentration of metal particles

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