Influence of the Addition of Montmorillonite in an Epoxy Powder Coating Applied on Carbon Steel

Piazza, Diego; Baldissera, Alessandra F.; Kunst, Sandra Raquel; Rieder, Ester Schmidt; Scienza, Lisete Cristine; Ferreira, Carlos Arthur; Zattera, Ademir J.

doi:10.1590/1516-1439.312714

Cited by 21 publications

(10 citation statements)

References 20 publications

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“…In addition, among the different types of powder organic coatings, epoxies are the most common due to their high mechanical (i.e. wear resistance, hardness, stiffness) and corrosion protective properties [6][7][8][9][10] . These types of organic coatings can be found in many different applications, such as domestic appliances, street furniture and in the automotive and aeronautics sectors 8,11 , as well as in flow-handling components such as pipelines 6,12 .…”

Section: Introductionmentioning

confidence: 99%

Corrosion Protection in Chloride Environments of Nanosilica Containing Epoxy Powder Coatings with Defects

Fernández-Álvarez

Velasco

Bautista

et al. 2020

J. Electrochem. Soc.

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This paper describes the use of innovative, nanosilica containing epoxy powder coatings for the corrosion protection of steel. Two types of nanosilica particles (hydrophilic -HL-and hydrophobic -HB-) were mixed by ball milling with the powders (0.75 wt.%). The adequate homogeneity and embedding of nanoparticles were verified by transmission electron microscopy.The corrosion performance of the coatings as-received, and with HL and HB additions, were analyzed in 3.5 wt.% NaCl solutions. The mechanism and rate of delamination of defective coatings under drops simulating atmospheric conditions were analyzed by Scanning Kelvin Probe measurements for 30 days. The results show that the corrosion attack progresses through a cathodic delamination mechanism. Besides, fully-immersed samples, with and without defects, were monitored by electrochemical impedance spectroscopy. In defective coatings under these conditions, the occurrence of anodic undermining is proved. The results obtained reveal that the corrosion driven coating failure is delayed in the case of the epoxy coatings containing nanosilica. This delay is larger in the case of HB additions than HL additions in both atmospheric and immersion conditions. The corrosion mechanism observed is dependent upon exposure conditions. It is proposed that the nanoparticles delay water absorption, thus delaying corrosion attack.

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Section: Introductionmentioning

confidence: 99%

Corrosion Protection in Chloride Environments of Nanosilica Containing Epoxy Powder Coatings with Defects

Fernández-Álvarez

Velasco

Bautista

et al. 2020

J. Electrochem. Soc.

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“…Before the exposure test, a higher value of gloss was observed for the T 0 coating. In contrast, the modified coatings T 5 and T 10 have exhibited lower gloss due to roughness on the coating surface caused by the addition of irregularly shaped titanium metal particles [46]. A gloss of modified coatings may be improved by increasing coat thickness much more than the largest incorporated particle.…”

Section: Gloss Measurementmentioning

confidence: 96%

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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“…However, epoxy coatings present better mechanical and thermal properties, excellent adhesion to most substrates and high corrosion resistance [7][8][9][10]. There are few studies of epoxy powder coatings at present [7,11,12], since most of the studies on organic powder coatings have been focused on polyester [11,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Currently, it is widely known that wear is one of the most interesting characteristics to be enhanced for organic coatings [18]. Other properties such as corrosion resistance [7][8][9][10][11] or UV resistance [15] are looking to be improved. SiO 2 nanoparticles are the additions most used to improve wear resistance, although other nanoparticles, such as alumosilicate [18] or calcium carbonate [19] are also employed.…”

Section: Introductionmentioning

confidence: 99%

“…The improvement in the wear of the organic coatings could depend on the homogeneous distribution of the nanoparticles in the resin matrix. In previous published studies, organic powder and the nanoparticles are usually mixed in an extruder [1,7,11,20,24,25] There are also other different mixing methods that result in good final properties for the coating and which are more economical, for example, a mechanical stirrer [14] or ball milling [13].…”

Section: Introductionmentioning

confidence: 99%

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Effect of silica nanoparticles on the curing kinetics and erosion wear of an epoxy powder coating

2020

Focus on Powder Coatings

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In this study, the wear resistance of an epoxy powder coating was improved by SiO 2 nanoparticles and their possible effect on curing kinetics of the coating was also evaluated. The epoxy powder coating was prepared with different percentages of nanoparticles (1-3 by wt.%) using a hot mixer, a method that can be more economic than other ones. The particle size distribution and Fourier-transform infrared spectroscopy (FT-IR) of epoxy powder were evaluated to examine the effect of mixing on the powder. The effect of SiO 2 on the curing of epoxy powder was studied by differential scanning calorimetry (DSC). The Kissinger and model free kinetics (MFK) methods were used to calculate the activation energy (E a) of the curing process of powders. The coating spraying process was carried out in an industrial installation on carbon steel substrates. The glass transition temperature (T g) of the coatings was also studied using DSC. The morphology of the cured organic coatings was observed by scanning electron microscopy (SEM). Stiffness and hardness Vickers (HV) were evaluated. A test based on ASTM D969 was developed to perform erosion measurements. The results obtained by both the Kissinger and MKF methods showed that nanoparticles do not influence significantly the E a of curing of the coatings. The addition of 1% SiO 2 improves the erosion wear at 45 and 60 • , due to the increase in stiffness and hardness provided by the nanoparticles, though, when particles collide at 60 • with the samples, the lowest thickness loss was found for the epoxy with 3% nanoreinforcements.

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Influence of the Addition of Montmorillonite in an Epoxy Powder Coating Applied on Carbon Steel

Cited by 21 publications

References 20 publications

Corrosion Protection in Chloride Environments of Nanosilica Containing Epoxy Powder Coatings with Defects

Corrosion Protection in Chloride Environments of Nanosilica Containing Epoxy Powder Coatings with Defects

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

Effect of silica nanoparticles on the curing kinetics and erosion wear of an epoxy powder coating

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