Investigating the effect of polytetrafluoroethylene on the tribological properties and corrosion resistance of epoxy/hydroxylated hexagonal boron nitride composite coatings

Mechanism Insights in Anticorrosion Performance of Waterborne Epoxy Coatings Reinforced by PEI-Functionalized Boron Nitride Nanosheets

“…The steel substrates, which were mechanically peeled off coatings at the end of 35 days’ immersion, were provided to analyze the corrosion products via XRD. The corrosion products of Q235 steel beneath blank WEP coating and 1 wt % PEI-BNNSs/WEP coating exhibit six distinct characteristic peaks, including Fe 3 O 4 at 36.4°, FeOOH at 14.1° and 27.1°, and α-Fe 2 O 3 at 35.7°and 62.6° as well as Fe at 44.7°and 65.0° (Figure a). This indicates that the corrosion products under those coatings are mainly composed of Fe, Fe 3 O 4 , FeOOH, and α-Fe 2 O 3 .…”

2D hexagonal boron nitride (h-BN) nanosheets in protective coatings: A literature review

“…The average wear rate and friction coefficient of the EP - BN - PTFE coating (PTFE/EP mass ratio - 0.8) diminished by 60.3% and 68.4% compared to EP - BN coating. The EP - BN - PTFE coated sample displayed a high impedance modulus of 2.28 × 10 11 Ω cm 2 (at 0.01 Hz) after 80 days of NaCl immersion, which was ∼5 times that of EP - BN coating, emphasizing the importance of the PTFE incorporation [ 98 ]. h-BN was exfoliated into BNNSs by calcination, air plasma treatment, and sonication in DMF.…”

Corrosion Behavior of 1D and 2D Polymorphs of Boron Nitride Ceramic

“…Initial studies report corrosion-inhibiting properties of hBN when BN particles are directly coated on metal substrates or as additives with polymers. − However, a few studies concluded that thick nanolaminate BN particles increase the corrosion rate of composite materials . Liu et al confirmed that the ultrathin-grown BN’s effectiveness on Ni acted as an effective oxidation-resistant coating in an aggressive atmosphere up to 1100 °C .…”

“…Yi et al, in their study on size-selected BNNS coating on a polymer, concluded that larger BNNS (∼21.4 μm 2 ) greatly enhanced the corrosion resistance of the polymer. Hexagonal BN’s proactive anticorrosive property is directly correlated with its surface morphology and area. − …”

“…Bulk, free-standing 1D boron nanotubes (BNNTs) fabricated as 100% BNNT and oriented randomly in-plane are commercially available as BNNT buckypaper (BP). − They are analogous to carbon nanotubes but offer multifunctional advantages, including piezoelectricity, electrical insulation, high-temperature stability, and neutron absorption. , Compared to 2D hBN nanoplatelet (BNNP), 1D BNNT is arranged randomly into a porous 3D structure and offers a substantially greater surface area. Previous research studies − concluded that hBN with a high surface area offers increased corrosion resistance due to higher interfacing with the underlying material. Yet, BNNTs are not recognized as corrosion-inhibiting additives.…”