Electrochemical and mechanical investigation into the effects of polyacrylamide/TiO2 in polyurethane coatings on mild steel structures in chloride media

Chandraraj, Shanmuga Sundari; Xavier, Joseph Raj

doi:10.1007/s10853-022-07483-3

Cited by 19 publications

(2 citation statements)

References 53 publications

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“…As per the ASTM standard (ASTM D3985) water, permeability test was carried out by measuring the amount of water going through the film. The volume of H 2 O fraction ( W c ) assimilated by pure PU, PU‐NiS 2 , PU‐BAO/NiS 2 , PU‐GO/NiS 2 , and PU‐GO/BAO‐NiS 2 coatings was found by the equation 26

W_{normalc} = [\log (C_{t} / C_{0}) / \log (ε {normalH}_{2} O)] \times 100

…”

Section: Methodsmentioning

confidence: 99%

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Xavier

2023

J of Applied Polymer Sci

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The anticorrosion, flame retardant, and mechanical properties of polyurethane (PU) coatings have been improved by the integration of nickel disulfide (NiS2), 2,5‐Bis(4‐aminophenyl)‐1,3,4‐oxadiazole (BAO), and graphene oxide (GO). The structural, morphological, dielectric, and hydrophobic behaviors of the films were characterized for the different formulations of coatings such as pure PU, PU‐NiS2, PU‐BAO/NiS2, PU‐GO/NiS2, and PU‐GO/BAO‐NiS2 (nanocomposite) by means of scanning electron microscope/X‐ray energy dispersive spectroscopy, transmission electron microscope, thermogravimetric analysis, X‐ray photoelectron spectroscopy, X‐ray diffraction, and contact angle measurement. As a result, with the addition of only 0.3% GO/BAO‐NiS2, the dielectric constant of PU was increased by 81‐fold at 1 Hz. Additionally, the nanocomposite had significantly lower peak heat release rate and overall heat released values than pure PU, a difference of 57% and 51%, respectively, demonstrating its greater flame retardancy. The electrochemical techniques and mechanical testing confirmed that GO/BAO‐NiS2 (0.3%) composite exhibit enhanced anticorrosive, hydrophobic, flame retardancy, and mechanical performance of the PU coating. The super hydrophobic behavior is confirmed by its water contact angle of 165°. Furthermore, the resistance of the nanocomposite was found to be much higher (16,985.6 kΩ.cm2) than that of the pure PU (145.4 kΩ.cm2) and the microhardness and tensile strength were increased sharply. Therefore, the nanocomposite could act as a potential coating material for industrial applications.

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W_{normalc} = [\log (C_{t} / C_{0}) / \log (ε {normalH}_{2} O)] \times 100

…”

Section: Methodsmentioning

confidence: 99%

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Xavier

2023

J of Applied Polymer Sci

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“…Previous studies have shown that epoxy coatings that have been nanofilled with TiO 2 -polyacrylamide perform better against corrosion. According to corrosion studies, the PAM-TiO 2 hybrid composite’s structure improves the barrier coating effectiveness of epoxy coatings on metal surfaces . Due to their wear protection, corrosion resistance, and strong adhesion, transition metal-based oxide nanoparticles such TiO 2 , SiO 2 , CuO, ZnO, ZrO 2 , CeO 2 , Fe 2 O 3 , and Al 2 O 3 are utilized to improve the corrosion resistance of polymer coatings. − In addition to these oxides, hafnium(IV) oxide (HfO 2 ) is a well-liked oxide coating because of its enhanced corrosion resistance qualities.…”

Section: Introductionmentioning

confidence: 99%

Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO₂ Nanofillers for the Protection of Steel Surface in Automobile Industry

Xavier,

S P,

et al. 2023

ACS Chem. Health Saf.

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With the help of (3-trimethoxysilylpropyl) diethylenetriamine (TMSPETA), hafnium(IV) oxide (HfO2), an inorganic nanofiller, was modified. The resulting TMSPETA/HfO2 was then encased in graphitic carbon nitride (GCN) and placed within a pure epoxy resin (EP). The protective behavior of mild steel coated with epoxy in the presence of various concentrations of GCN/TMSPETA-HfO2 was studied using electrochemical methods in seawater environment. It was found that the addition of 0.6 wt % of GCN/TMSPETA-HfO2 to the epoxy resin produced maximum resistance. Hence, the optimum concentration of 0.6 wt % was utilized for further investigation. The PHRR and THR values for the GCN/TMSPETA-HfO2 significantly decreased by 73% and 57%, respectively, as compared to pure EP, showing that the material is more flame retardant. The results of salt spray tests showed that the inclusion of GCN/TMSPETA-HfO2 in the epoxy matrix enhanced the corrosion protection performance and reduced water absorption. EIS measurements showed that the epoxy-GCN/TMSPETA-HfO2 had increased coating resistance of 6.42E9 Ω·cm2 even after 320 h of exposure to seawater. According to SECM investigations, the coated steel with EP-GCN/TMSPETA-HfO2 nanocomposite has the lowest ferrous ion dissipation (1.0 I/nA). FE-SEM/EDX investigation revealed that silanized GCN was enhanced in the degradation products, resulting in a durable inert nanolayered covering. The newly created EP-GCN/TMSPETA-HfO2 coating was incredibly water-resistant, with a WCA of 165°. The TMSPETA-HfO2 wrapped in GCN has demonstrated strong adhesion and hardness in the epoxy substrate as well as good mechanical properties. An increased adhesive strength (19.1 MPa) was achieved for mild steel coated with EP-GCN/TMSPETA-HfO2 prior to being immersed in seawater. As a result, the coating has greater adhesive strength and can hold up even after a prolonged immersion. In light of this, the EP-GCN/TMSPETA-HfO2 nanocomposite may be used as a coating component in the automotive industry.

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Halloysite for clay–polymer nanocomposites: effects of nanofillers on the anti-corrosion, mechanical, microstructure, and flame-retardant properties—a review

Beryl¹,

Xavier

2023

J Mater Sci

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Electrochemical and mechanical investigation into the effects of polyacrylamide/TiO2 in polyurethane coatings on mild steel structures in chloride media

Cited by 19 publications

References 53 publications

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO₂ Nanofillers for the Protection of Steel Surface in Automobile Industry

Halloysite for clay–polymer nanocomposites: effects of nanofillers on the anti-corrosion, mechanical, microstructure, and flame-retardant properties—a review

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Electrochemical and mechanical investigation into the effects of polyacrylamide/TiO2 in polyurethane coatings on mild steel structures in chloride media

Cited by 19 publications

References 53 publications

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

RETRACTED: Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO2 Nanofillers for the Protection of Steel Surface in Automobile Industry

Halloysite for clay–polymer nanocomposites: effects of nanofillers on the anti-corrosion, mechanical, microstructure, and flame-retardant properties—a review

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Flame Retardant and Anticorrosion Behavior of Multifunctional Epoxy Nanocomposite Coatings Containing Graphitic Carbon Nitride/Silanized HfO₂ Nanofillers for the Protection of Steel Surface in Automobile Industry