Fabrication of Halloysite nanocontainers and their compatibility with epoxy coating for anti-corrosion performance

Feng, Yuanchao; Cheng, Y. Frank

doi:10.1080/1478422x.2016.1142161

Cited by 33 publications

(12 citation statements)

References 27 publications

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“…The impedance at 0.01 Hz of unscratched coatings is found to increase with the increase in amount of halloysite loading in the epoxy coating. In general, the enhancement in corrosion protection of epoxy coating upon the addition of nanofillers is due to the improved barrier performance and better adherence of the coating to the underlying substrate . In the case of halloysite filled epoxy coating, the halloysite acts as good barrier by reducing the porosity of the epoxy coating matrix and zigzag the diffusion path available by deleterious species .…”

Section: Results and Discussionmentioning

confidence: 99%

“…In general, the enhancement in corrosion protection of epoxy coating upon the addition of nanofillers is due to the improved barrier performance and better adherence of the coating to the underlying substrate. 34 In the case of halloysite filled epoxy coating, the halloysite acts as good barrier by reducing the porosity of the epoxy coating matrix and zigzag the diffusion path available by deleterious species. 35 As the amount of halloysite increases in the coating, the barrier effect increases to further enhance the corrosion protection ability of the coating.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

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Halloysite Nanotube as Multifunctional Component in Epoxy Protective Coating

Elgawady

Al-Maadeed

2016

Ind. Eng. Chem. Res.

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The current research explores the use of halloysite nanotube as a multifunctional filler in epoxy coating for carbon steel. Epoxy monomer loaded halloysite was incorporated into epoxy coating along with amine hardener immobilized mesoporous silica. The waterproofing, self-healing, anticorrosive abilities, and stability under weathering of the coating were evaluated. The halloysite nanotubes are able to impart better waterproofing property to the coating. The released epoxy monomer encapsulated inside the halloysite cavity upon reaction with amine curing agent immobilized in mesoporous silica recovers the damage and thereby facilitates self-healing in epoxy coating. Apart from offering healing ability to the coating, the halloysite nanotubes are able to protect the coatings for a longer period from severe weathering conditions.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Halloysite Nanotube as Multifunctional Component in Epoxy Protective Coating

Elgawady

Al-Maadeed

2016

Ind. Eng. Chem. Res.

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“…As the intended usage is nanocontainers, HNTs with a long, thick tubular shape are used for the smart coating (Sun et al , 2016). The layer-by-layer (LBL) method was used to increase the density of the solution and decrease shrinkage (Feng and Cheng, 2016). The deposition of polyelectrolytes was used for the storage of a heterocyclic compound with three nitrogen atoms (Feng et al , 2017), called benzotriazole (BTA) (Khiati et al , 2011), to act as a corrosion inhibitor.…”

Section: Introductionmentioning

confidence: 99%

Modification and corrosion resistance of halloysite carrier with metal nanoinhibitor in marine corrosion environment

Wang¹,

Lv²,

Liu³

et al. 2022

ACMM

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Purpose The purpose of this paper is to provide theoretical guidance and an experimental basis for a smart anti-corrosion coating of halloysite nanocontainers loaded with benzotriazole (BTA) inhibitors on copper in a marine corrosion environment. Design/methodology/approach In the present study, the smart anti-corrosion coatings of halloysite nanocontainers loaded inhibitors on copper were synthesized by adding BTA inside the halloysite nanocontainers. Then, the halloysite carrier’s surface topography and composition in the halloysite were observed using scanning electron microscopy. After the successful synthesis of the coating, the inhibitor’s physical and chemical properties, as well as the mass change in halloysite, were evaluated in terms of temperature fluctuation and time using thermal gravity analysis (TGA). Finally, electrochemical impedance spectroscopy was used to check the pH selectivity for the self-releasing of BTA out of the nanocontainers. Findings The results indicate that the efficiency of the nanotubes was enhanced by calcination at high temperatures. The thermal gravity analysis by TGA shows that halloysite nanoparticles store inhibitors BTA and there are approximately 37.39 Wt.% BTA loaded in each nanocontainer. The release of the preloaded BTA from the halloysite nanocontainers is pH 7 in a 3.5% NaCl solution. Originality/value The development of a new environmentally safe coating for corrosion protection of metallic surfaces has attracted great interest in material science over the past few years. At present, halloysite nanotubes (HNTs) have become a research hotspot internationally and are widely used in nanocomposites, catalysis, nanofiltration, drug sustained-release and other fields. However, the application of HNT is limited by its modification methods. As the carrier of metal nanocorrosion inhibitor in the Marine corrosive environment, the modification research of HNT still needs to be further studied and improved so as to expand the practical application of HNT in the Marine corrosive environment. In this paper, the modification of HNTs was investigated and observed. Four different modification schemes were used to observe and compare the structural properties of the nanotubes under different conditions so as to provide a theoretical basis for the further loading of HNTs as corrosion inhibitors.

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“…Aluminum phosphate (AlPO 4 ), sodium orthosilicate (Na 3 SiO 4 ), cerium salts (Ce(NO 3 ) 3 , CeCl 3 ), nickel salts (Ni(CH 3 COO) 2 , NiF 2 ) and dichromate (K 2 Cr 2 O 7 ) are common sealants used in various spraying coatings including amorphous/nanocrystalline coatings [4][5][6][7][8][9][10]. Wang et al [6] investigated the effect of sealing treatment on the corrosion behavior of high velocity oxygen fuel (HVOF) Fe-based amorphous/nanocrystalline coatings and found that sealing treatment obviously enhanced the corrosion resistance of coatings and AlPO4 sealant exhibited the best sealing effect.…”

Section: Introductionmentioning

confidence: 99%

Study of alumina sealing of HVOF thermally sprayed WC-Co coatings by sol-gel method

Amousoltani

Salimijazi

Golozar

2019

Mater. Res. Express

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Tungsten carbide (WC) has been known as a hard and wear resistant material. Thermal spray coatings were used widely to deposit Ni and/or Co based WC. The high-velocity oxy-fuel (HVOF) spraying is one of the best methods among thermal spray processes that creates denser coatings with less pores for high corrosive environments applications. In this study, the effect of alumina sealing process on the HVOF WC-12Co coatings by the Sol-Gel method for corrosion and wear properties at high temperature applications was investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were utilized to characterize the morphology and properties of the coatings before and after the sealing process. High temperature wear properties of coatings before and after sealing were tested by ball-on-disk wear tester at 400°C. The cross-section of the sealed coatings showed that open pores were filled after sol gel. The thickness of the sealed layer was about 14 μm. Results indicated that the sealing process increased the microhardness of coating slightly from 1160±160 to 1250±150 HV. Comparing the results of polarization in 3.5 wt% NaCl solution and wear test showed that the corrosion current density decreased and the wear resistance increased after sealing. A sealed sample with filled open porosity led to recording a higher corrosion resistance (2.9±0.7 μA cm −2 ) compared to the as sprayed coating (8.90±0.5 μA cm −2 ). The friction profile of the sealed coating showed reduction of the friction coefficient between 0.25 and 0.5 in comparison to the as-sprayed coating at room temperature (04-0.6). Also, the high temperature wear behavior of the sealed coatings was improved. The weight loss was much lower for the sealed coating (5 mg) than that for the as-sprayed coating (13 mg).

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Fabrication of Halloysite nanocontainers and their compatibility with epoxy coating for anti-corrosion performance

Cited by 33 publications

References 27 publications

Halloysite Nanotube as Multifunctional Component in Epoxy Protective Coating

Halloysite Nanotube as Multifunctional Component in Epoxy Protective Coating

Modification and corrosion resistance of halloysite carrier with metal nanoinhibitor in marine corrosion environment

Study of alumina sealing of HVOF thermally sprayed WC-Co coatings by sol-gel method

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