Anticorrosive waterborne epoxy (EP) coatings based on sodium tripolyphosphate-pillared layered double hydroxides (STPP-LDHs)

Wang, Na; Gao, Huiying; Zhang, Jing; Li, Long; Fan, Xiaolei; Diao, Xinlin

doi:10.1016/j.porgcoat.2019.04.055

Cited by 39 publications

(12 citation statements)

References 47 publications

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“…The XRD patterns for the LDH sample show positions of (003), ( 006), ( 009), ( 012), ( 015), ( 018), ( 110) and (113) diffractions. The basal spacing of the (003) reflection was calculated to be 0.77 nm, which is in accordance with values typically reported for hydrotalcite [18] anions onto the LDH structure [2]. The increase in gallery height for LDH-PO 4 reveals that the phosphate anions were not successfully intercalated into the interlayer of LDH, because the intercalation of PO 4 3 − increased the corresponding d 003 -value to 1.05 nm according to the reported literature [2].…”

Section: Characterisation Of Ldh-posupporting

confidence: 88%

Phosphate loaded layered double hydroxides for active corrosion protection of carbon steel

Sui

Bai

et al. 2021

Corrosion Engineering, Science and Technology

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Layered double hydroxides (LDHs) can serve as corrosion inhibitor reservoirs. In the present work, hydrotalcite-like LDHs were synthesized and employed as host matrixes for the release of phosphate. The morphological and structural properties of the as-prepared LDH-PO 4 were characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The PO 4 3adsorption uptake was successfully confirmed by the XRD results. The corrosion resistance of the coating with LDH-PO 4 was investigated by electrochemical impedance spectroscopy (EIS), which was approximately 1 order of magnitude higher than that of the blank coating after immersion for 168 h. Results of the scanning Kelvin probe technique revealed that the potential of LDH-PO4 coating was higher and smoother than that of the blank coating after exposure to 0.5 M NaCl solution. This effect is attributed to the release of PO 4 3− that forms a phosphate protective film in the scratched region.

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Section: Characterisation Of Ldh-posupporting

confidence: 88%

Phosphate loaded layered double hydroxides for active corrosion protection of carbon steel

Sui

Bai

et al. 2021

Corrosion Engineering, Science and Technology

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“…In our previous work, water-based composite epoxy coatings with good barrier performance and corrosion resistance were developed with layered sodium montmorillonite (Na-MMT) [11], mesoporous MCM-41 silica nanoparticles [12], polyethylene imine (PEI)-modified meso-TiO 2 [13], and tripolyphosphate intercalated hydrotalcite as fillers [14]. The results show that these functional fillers can inhibit the corrosion process in the coating.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that these functional fillers can inhibit the corrosion process in the coating. For example, sodium tripolyphosphate intercalated hydrotalcite improves the solubility of hydrotalcite and increases the compatibility of filler with water-based epoxy resins, thus effectively impeding the transport of corrosive electrolytes through the coating [14]. Therefore, layered materials and materials with channel structures can improve the corrosion resistance of waterborne epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

Phytic Acid Intercalated Graphene Oxide for Anticorrosive Reinforcement of Waterborne Epoxy Resin Coating

et al. 2019

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Epoxy resin coatings were prepared with phytic acid-doped graphene oxide (PA-GO) to modify epoxy resins (EP). The aim was to improve the dispersion of GO in waterborne epoxy resin, and thus to improve the corrosion resistance of steel structures. The Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) results showed that PA-GO was successfully prepared and has a better dispersion in epoxy resin. This is mainly due to the PA insert, which increased the layer spacing of the GO. The results obtained under the controlled corrosive environment showed that the specimen coated with EP containing 1.0 wt.% PA-GO had better corrosion resistance than other samples. This resistance was also two orders of magnitude higher than pure epoxy coating. The main reason for this is that the dispersion of GO in waterborne epoxy resin had been improved.

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“…[4][5][6][7] In recent years, with increasing restrictions on VOCs, eco-friendly waterborne coatings have gained increasing attention. [8,9] During the curing process of traditional single waterborne coatings, numerous microporous crevices will be formed inside and on the surface of the coatings with the volatilization of water solvent, [10] which usually leads to the reduction of their corrosion resistance performances. The efficient method to solve this problem is to add some organic and inorganic nanofillers like SiO 2 , g-C 3 N 4 , Ti 3 C 2 , and graphene oxide in the coatings.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

Zhao

Huang

Gao

et al. 2023

Polymer Engineering & Sci

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In this work, polyaniline-cellulose nanofiber (PANI-CNF) nanocomposites were prepared by in-situ polymerization of aniline on 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) oxidized CNFs. Fourier transform infrared spectroscopy and transmission electron microscope demonstrate the successful polymerization of aniline on CNFs. The PANI-CNF nanocomposites were added as nanofillers to waterborne epoxy resin (WER) in different proportions. The composite coatings with different contents of PANI-CNFs were prepared by fabricating the mixture on the Q235 steel sheets. The corrosion resistance of different coatings was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. The results confirmed that composite coatings containing 0.5% PANI-CNF exhibit the optimum anticorrosion behaviors and best corrosion resistance, which shows the lowest corrosion current density (1.788 Â 10 À7 A/cm À2 ) and highest corrosion potential (À0.458 V). In addition, PANI-CNF can significantly enhance the anticorrosion performance of WER coatings and maintain a high value even after 40 days of immersion in NaCl solutions. The above performances are attributed to the synergistic effect of the barrier effects and the passivation mechanism. Therefore, the bio-based composite materials developed in this work are promising in enhancing the corrosion protection of mild steel, which is essential for the sustainable development of waterborne coatings.

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Anticorrosive waterborne epoxy (EP) coatings based on sodium tripolyphosphate-pillared layered double hydroxides (STPP-LDHs)

Abstract: Anticorrosive waterborne epoxy (EP) coatings based on sodium tripolyphosphate-pillared layered double hydroxides (STPP-LDHs).

Cited by 39 publications

References 47 publications

Phosphate loaded layered double hydroxides for active corrosion protection of carbon steel

Phosphate loaded layered double hydroxides for active corrosion protection of carbon steel

Phytic Acid Intercalated Graphene Oxide for Anticorrosive Reinforcement of Waterborne Epoxy Resin Coating

Preparation of polyaniline/cellulose nanofiber composites with enhanced anticorrosion performance for waterborne epoxy resin coatings

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