A multiple synergistic composite coating with ultrahigh anti-corrosion performance under harsh oxygen environment

Yu, Chao; Xu, Fei; Meng, Lei; Wei, Yuting; Chang, Yuanyuan; Zhang, Meng; Wang, Huaiyuan; Wang, Huaiyuan

doi:10.1016/j.corsci.2022.110696

Cited by 25 publications

(8 citation statements)

References 61 publications

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“…As displayed in Figure c, the adhesion strength was 10.58 MPa and dropped to 9.84 MPa with direct addition of 0.5 wt % h-BN, while that of 0.5 wt % PEI-BNNSs/WEP was higher, up to 11.04 MPa. The exceptional adhesion of 0.5 wt % PEI-BNNSs/WEP coating is attributed to the most suitable interfacial interaction between the -NH 2 of PEI and the −OH on the steel surface as well as the good compatibility brought about by PEI. ,, …”

Section: Resultsmentioning

confidence: 99%

“…The exceptional adhesion of 0.5 wt % PEI-BNNSs/WEP coating is attributed to the most suitable interfacial interaction between the -NH 2 of PEI and the −OH on the steel surface as well as the good compatibility brought about by PEI. 8,55,56 Corrosive media can diffuse in the coating due to sufficient free-volume pores inside it. 57−60 The PALS measurement was employed to explore the role of free volume pores in the transportation of corrosive media along the coatings.…”

Section: Stability Of Pei-bnnss Aqueous Dispersionmentioning

confidence: 99%

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

Wang,

Tang,

Xiang

et al. 2024

Langmuir

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Functionalized hexagonal boron nitride nanosheets (BNNSs) have arisen as compelling anticorrosive additives, yet the precise mechanism of their corrosion resistance enhancement in coatings remains unclear. Here, polyethylenimine functionalized BNNSs (PEI-BNNSs) with approximately 6–11 layers were prepared through a “one-step” method. Then, the PEI-BNNSs/Waterborne epoxy (WEP) composite coatings were incorporated via the waterborne latex blending method for the anticorrosion of the Q235 substrate. The impedance modulus (|Z|f = 0.01 Hz) of 0.5 wt % PEI-BNNSs/WEP composite coating soaked in 3.5 wt % NaCl solution for 35 days increased by 4 orders of magnitude compared to pure WEP coating, exhibiting exceptional long-term resistance against corrosion. The positron annihilation lifetime spectroscopy and corrosion product analysis demonstrated that the reinforced anticorrosion capabilities are not solely ascribed to the “tortuous path effect” arising from BNNSs impermeability. These mechanisms also encompass the reduction in free volume fraction and radius of the free volume cavities within the composite coating brought about by the PEI molecules. Additionally, the increase in coating adhesion, promoted by PEI, plays an important role in augmenting the barrier properties against corrosive agents. This study provided a full comprehension of the role played by functionalized BNNSs in fortifying the anticorrosion attributes of WEP coatings.

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Section: Resultsmentioning

confidence: 99%

Section: Stability Of Pei-bnnss Aqueous Dispersionmentioning

confidence: 99%

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

Wang,

Tang,

Xiang

et al. 2024

Langmuir

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“…The EIS data were further analyzed, and the graphs indicate the trend of coating resistance and capacitance of the samples with time, as shown in Figure S1. To assess the barrier properties of the DE@MoS 2 -SM composite coating, the water absorption ( W a ) of the coating was calculated using the equation below. , W a = lg nobreak0em0.1em⁡ Q t − lg nobreak0em0.1em⁡ Q o lg nobreak0em0.1em⁡ 80 × 100 % …”

Section: Resultsmentioning

confidence: 99%

“…To assess the barrier properties of the DE@MoS 2 -SM composite coating, the water absorption (W a ) of the coating was calculated using the equation below. 51,52 Table 1. Fitted Parameters for the EIS Spectrum Are Depicted in Figure 8 Here, Q 0 and Q t represent the capacitance of the coating at the initial stage and after immersion for time t, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Lu,

Zhang,

Yin

et al. 2024

Langmuir

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Molybdenum disulfide (MoS 2 ) demonstrates promising applications in enhancing the corrosion and wear resistance of metals, but the susceptibility of this nanomaterial to agglomeration hinders its overall performance. In this study, the externally assisted corrosion inhibitor sodium molybdate (SM) was successfully constructed in diatomaceous earth (DE) and molybdenum disulfide (MoS 2 ). This not only served as a molybdenum source for MoS 2 but also enabled the preparation of DE@MoS 2 -SM microcapsules, achieving a corrosion inhibitor loading of up to 23.23%. The corrosion testing reveals that the composite coating, when compared to the pure epoxy coating, exhibits an impedance modulus 2 orders of magnitude higher (1.80 × 10 9 Ω•cm 2 ), offering prolonged protection for magnesium alloys over a 40 day period. Furthermore, a filler content of 3% sustains a coefficient of friction (COF) at 0.55 for an extended duration, indicating commendable stability and wear resistance. The protective performance is ascribed to the synergistic enhancement of corrosion and wear resistance in the coatings, facilitated by the pore structure of DE, the high hardness of MoS 2 , and the obstructive influence of Na 2 MoO 4 . This approach offers a straightforward and efficient means of designing microcapsules for use in corrosive environments, whose application can be extended in industrial fields. In particular, we promote the application of nautical instruments, underwater weapons, and seawater batteries in the shipbuilding industry and marine engineering.

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“…Of these methods mentioned above, coating protection is favored due to its high corrosion protection efficiency, simplicity of process, and low cost [ 13 , 14 ]. Among all kinds of coating anti-corrosion technologies, epoxy coatings are of great interest due to their excellent working properties and simple application process [ 15 , 16 ]. Previous studies have shown, however, that epoxy coatings contain hydrophilic groups that may form water seepage channels in harsh environments [ 17 , 18 ] and that epoxy coatings are brittle and prone to cracking when exposed to corrosive environments for long periods of time [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of CeO2-GO/Epoxy Nanocomposite Coating in Simulated Seawater and Concrete Pore Solutions

Liu

Lyu

et al. 2023

Polymers

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Reinforced concrete structures in the marine environment face serious corrosion risks. Coating protection and adding corrosion inhibitors are the most economical and effective methods. In this study, a nano-composite anti-corrosion filler with a mass ratio of CeO2:GO = 4:1 was prepared by hydrothermally growing cerium oxide on the surface of graphene oxide. The filler was mixed with pure epoxy resin at a mass fraction of 0.5% to prepare a nano-composite epoxy coating. The basic properties of the prepared coating were evaluated from the aspects of surface hardness, adhesion grade, and anti-corrosion performance on Q235 low carbon steel subjected to simulated seawater and simulated concrete pore solutions. Results showed that after 90 days of service, the corrosion current density of the nanocomposite coating mixed with corrosion inhibitor was the lowest (Icorr = 1.001 × 10−9 A/cm2), and the protection efficiency was up to 99.92%. This study provides a theoretical foundation for solving the corrosion problem of Q235 low carbon steel in the marine environment.

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A multiple synergistic composite coating with ultrahigh anti-corrosion performance under harsh oxygen environment

Cited by 25 publications

References 61 publications

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

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

Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Corrosion Resistance of CeO2-GO/Epoxy Nanocomposite Coating in Simulated Seawater and Concrete Pore Solutions

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A multiple synergistic composite coating with ultrahigh anti-corrosion performance under harsh oxygen environment

Cited by 25 publications

References 61 publications

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

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

Diatomite@MoS2 Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear

Corrosion Resistance of CeO2-GO/Epoxy Nanocomposite Coating in Simulated Seawater and Concrete Pore Solutions

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Product

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Diatomite@MoS₂ Nanocomposite Layers as Composite Coating Targeting for Mg Alloys Endowed with Properties of Anticorrosion and Antiwear