Protective Coatings Based on PMMA–Silica Nanocomposites Reinforced with Carbon Nanotubes

Harb, Samarah Vargas; Santos, F. C. dos; Pulcinelli, Sandra Helena; Santilli, Celso Valentim; Knowles, Kevin M.; Hammer, Peter

doi:10.5772/62808

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…The resulting substantial lifetime increase is attributed to the formation of insoluble oxides and hydroxides in the corroded zones [3,11,[14][15][16][17]. On the other hand, significant improvements of thermal and mechanical properties have been achieved by incorporation of clays, lignin, carbon nanotubes, graphene oxide, and graphene into polymeric or organic-inorganic matrices [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies on the inclusion of carbon nanotubes and graphene oxide in hybrid and polymer matrices have shown excellent results in terms of increased mechanical strength, scratch and wear resistance, thermal stability, adhesion to metallic substrate, hydrophobicity, and electrical conductivity [18,19,[28][29][30]. Despite all of these advances, a simultaneous improvement not only of mechanical and thermal stability but also of anticorrosive efficiency of protective coatings has been accomplished only recently by the incorporation CNT and GO in a PMMA-silica matrix [18].…”

Section: Pmma-silica Hybrid Reinforced With Lignin Carbon Nanotubes mentioning

confidence: 99%

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Organic-Inorganic Hybrid Coatings for Corrosion Protection of Metallic Surfaces

Harb

Trentin²,

Torrico

et al. 2017

New Technologies in Protective Coatings

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A variety of organic-inorganic hybrids have been designed to act as anticorrosive coatings of metallic substrates. Among them, epoxy-silica and poly(methyl methacrylate) (PMMA)-silica hybrids, prepared by the sol-gel process and deposited onto steel or aluminum alloys, have demonstrated high anticorrosive efficiency combined with high thermal and mechanical resistance. Lignin, carbon nanotubes, and graphene oxide have been incorporated into PMMA-silica hybrids as reinforcement agents, and cerium (IV) as corrosion inhibitor. Both hybrids were characterized in terms of their structural and thermal characteristics using different pectroscopies, microscopies and thermogravimetric analysis. Both hybrids present homogeneous nanostructure composed of highly condensed silica nanodomains covalently bonded to the polymeric phase. The transparent coatings with a thickness of 2-7 μm have low surface roughness, high adhesion to metallic substrates, elevated thermal stability, and excellent barrier behavior. Electrochemical impedance spectroscopy showed for coated samples a high corrosion resistance of up to 50 GΩ cm2 and durability >18 months in saline solution. Further improvement of corrosion resistance, thermal and mechanical stability was achieved by incorporation of lignin, carbon nanotubes, and graphene oxide into PMMA-silica matrix, and a self-healing effect was observed after Ce(IV) addition. The results are compared and discussed with those recently reported for a variety of hybrid coatings.

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Section: Introductionmentioning

confidence: 99%

Section: Pmma-silica Hybrid Reinforced With Lignin Carbon Nanotubes mentioning

confidence: 99%

Organic-Inorganic Hybrid Coatings for Corrosion Protection of Metallic Surfaces

Harb

Trentin²,

Torrico

et al. 2017

New Technologies in Protective Coatings

Self Cite

View full text Add to dashboard Cite

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“…On the metal side of the pore, an area of the coating has divided and a bore filled with an electrolyte solution has formed. with, very different than the bulk solution outside of the coating.Ru, electrolyte resistance, Rp, polarization resistance [28]- [30].…”

Section: The Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Roughness Effect on Corrosion of Gr-Cu -Ni Coated Steel in Saline Water

atia¹,

Sadawy²,

Kandil³

et al. 2021

JUSST

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Effect of surface roughness on corrosion behavior for carbon steel was coated by metallic layers Cu- Ni Reinforced with Gr layers. Surface finishing P320, P600 and P1200 mesh used until a mirror shiny surface before metallic coated with Gr layers at consecrations 0.25, 0.5, 1and 2 g/l of Gr. First, X-ray diffraction), electron microscopy associated for carbon steel & Gr and Microscopic test for coated specimens. The techniques were performed to study the effect of saline water (3.5%) on the corrosion behaviors, Open circuit potential, Tafel polarization and impedance spectroscopy tests. At P320 Equivalent Circuit elements were decreasing but, Corrosion reaction’s Rp was increased at 5 min and 0.25 g/l. And also, coating’s Rpore with Electrolyte’s Ru were increasing at 30 min for 0.5 g/l, and also coating’s Rpore and Electrolyte’s Ru were increased at 20 min for 1 g/l, At P600 ECE’s were decreasing but, corrosion reaction’s Rp was increased at 30 min 1 g/l, and also, coating’s Rpore and Electrolyte’s Ru were increased at 20 min for 1 g/l, and At P1200 ECE’s were decreasing but, Coating’s Ccoat was increased at 5 min 0.25 g/l, and also coating’s Rpore and Electrolyte’s Ru were increased at 0.5g/l, 30 min.

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Section: The Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Time effect of graphene coating in between metallic layers of Copper-Nickel on corrosion behavior for carbon steel in saline water

atia

Sadawy²,

Kandil³

et al. 2021

Journal of Petroleum and Mining Engineering

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The study was an experimental investigation for time 10, 20, and 30 min effect of graphene coating in between metallic layers of copper-nickel on corrosion behavior for carbon steel in saline water. And Surface finishing for substrates was P320, P600, and P1200 mesh until a mirror shiny surface before coated by metallic layers Cu -Cu -Ni reinforced with concentrations 0.25, 0.5, 1and 2 g/l graphene. First, X-ray diffraction, scanning electron microscopy associated for carbon steel & graphene and Microscopic test for coated specimens. The techniques were performed to study effect of saline water (3.5%) on the corrosion behaviors. Open circuit potential, tafel polarization, cyclic potentiodynamic polarization and impedance.The results revealed that the types of corrosion were pitting corrosion, where the highest protections against corrosion were at 20 min with concentration 1 g/L graphene coating with P600 and P320 mesh. The results also showed the time increasing led to increasing for protection efficiency, decreasing for corrosion rates, increasing for polarization resistance, and decreasing for porosity percentage. Between metallic layers coating reinforced with concentrations 0.25, 0.5, 1and 2 g/l graphene.

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Protective Coatings Based on PMMA–Silica Nanocomposites Reinforced with Carbon Nanotubes

Cited by 7 publications

References 38 publications

Organic-Inorganic Hybrid Coatings for Corrosion Protection of Metallic Surfaces

Organic-Inorganic Hybrid Coatings for Corrosion Protection of Metallic Surfaces

Roughness Effect on Corrosion of Gr-Cu -Ni Coated Steel in Saline Water

Time effect of graphene coating in between metallic layers of Copper-Nickel on corrosion behavior for carbon steel in saline water

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