1
|
Li X, Wang W, Dong W, Zhang X, Xu H, Lin L. Plasma-liquid synthesized carbon-supported platinum nanoparticles as active electrocatalysts. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104234] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
2
|
Youh MJ, Huang YR, Peng CH, Lin MH, Chen TY, Chen CY, Liu YM, Pu NW, Liu BY, Chou CH, Hou KH, Ger MD. Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings. NANOMATERIALS 2021; 11:nano11061603. [PMID: 34207195 PMCID: PMC8234136 DOI: 10.3390/nano11061603] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/10/2021] [Accepted: 06/15/2021] [Indexed: 01/10/2023]
Abstract
Corrosion prevention and infrared (IR) stealth are conflicting goals. While graphene nanosheets (GN) provide an excellent physical barrier against corrosive agent diffusion, thus lowering the permeability of anti-corrosion coatings, they have the side-effect of decreasing IR stealth. In this work, the anti-corrosion properties of 100-μm-thick composite epoxy coatings with various concentrations (0.01–1 wt.%) of GN fillers thermally reduced at different temperatures (300 °C, 700 °C, 1100 °C) are first compared. The performance was characterized by potentiodynamic polarization scanning, electrochemical impedance spectroscopy, water contact angle and salt spray tests. The corrosion resistance for coatings was found to be optimum at a very low filler concentration (0.05 wt.%). The corrosion current density was 4.57 × 10−11 A/cm2 for GN reduced at 1100 °C, showing no degradation after 500 h of salt-spray testing: a significant improvement over the anti-corrosion behavior of epoxy coatings. Further, to suppress the high IR thermal signature of GN and epoxy, Al was added to the optimized composite at different concentrations. The increased IR emissivity due to GN was not only eliminated but was in fact reduced relative to the pure epoxy. These optimized coatings of Al-GN-epoxy not only exhibited greatly reduced IR emissivity but also showed no sign of corrosion after 500 h of salt spray test.
Collapse
Affiliation(s)
- Meng-Jey Youh
- Department of Mechanical Engineering, Ming Chi University of Technology, Taishan, New Taipei City 243, Taiwan;
| | - Yu-Ren Huang
- Department of Applied Science, R.O.C. Naval Academy, Zuoying, Kaohsiung 813, Taiwan;
| | - Cheng-Hsiung Peng
- Department of Chemical and Materials Engineering, Minghsin University of Science and Technology, Xinfeng, Hsinchu 304, Taiwan;
| | - Ming-Hsien Lin
- Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, Taiwan; (M.-H.L.); (T.-Y.C.); (Y.-M.L.)
| | - Ting-Yu Chen
- Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, Taiwan; (M.-H.L.); (T.-Y.C.); (Y.-M.L.)
| | - Chun-Yu Chen
- Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan; (C.-Y.C.); (B.-Y.L.); (C.-H.C.); (K.-H.H.)
- Chemical System Research Division, National Chung Shan Institute of Science and Technology, Longtan, Taoyuan 325, Taiwan
| | - Yih-Ming Liu
- Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, Taiwan; (M.-H.L.); (T.-Y.C.); (Y.-M.L.)
| | - Nen-Wen Pu
- Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan; (C.-Y.C.); (B.-Y.L.); (C.-H.C.); (K.-H.H.)
- Correspondence: (N.-W.P.); (M.-D.G.); Fax: +886-3-3808906 (M.-D.G.)
| | - Bo-Yi Liu
- Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan; (C.-Y.C.); (B.-Y.L.); (C.-H.C.); (K.-H.H.)
| | - Chen-Han Chou
- Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan; (C.-Y.C.); (B.-Y.L.); (C.-H.C.); (K.-H.H.)
| | - Kai-Hsiang Hou
- Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan; (C.-Y.C.); (B.-Y.L.); (C.-H.C.); (K.-H.H.)
| | - Ming-Der Ger
- Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, Taiwan; (M.-H.L.); (T.-Y.C.); (Y.-M.L.)
- Correspondence: (N.-W.P.); (M.-D.G.); Fax: +886-3-3808906 (M.-D.G.)
| |
Collapse
|
4
|
Low-Temperature CVD Graphene Nanostructures on Cu and Their Corrosion Properties. MATERIALS 2018; 11:ma11101989. [PMID: 30326613 PMCID: PMC6213400 DOI: 10.3390/ma11101989] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/02/2018] [Accepted: 10/02/2018] [Indexed: 11/29/2022]
Abstract
Chemical vapor deposition (CVD) graphene is reported to effectively prevent the penetration of outer factors and insulate the underneath metals, hence achieving an anticorrosion purpose. However, there is little knowledge about their characteristics and corresponding corrosion properties, especially for those prepared under different parameters at low temperatures. Using electron cyclotron resonance chemical vapor deposition (ECR-CVD), we can successfully prepare graphene nanostructures on copper (Cu) at temperatures lower than 600 °C. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, and potentiodynamic polarization measurements were used to characterize these samples. In simulated seawater, i.e., 3.5 wt.% sodium chloride (NaCl) solution, the corrosion current density of one graphene-coated Cu fabricated at 400 °C can be 1.16 × 10−5 A/cm2, which is one order of magnitude lower than that of pure Cu. Moreover, the existence of tall graphene nanowalls was found not to be beneficial to the protection as a consequence of their layered orientation. These correlations among the morphology, structure, and corrosion properties of graphene nanostructures were investigated in this study. Therefore, the enhanced corrosion resistance in selected cases suggests that the low-temperature CVD graphene under appropriate conditions would be able to protect metal substrates against corrosion.
Collapse
|
6
|
Wu TY, Chen PR, Chen HR, Kuo CW. Preparation of Pt/poly(aniline-co-orthanilic acid) nanocomposites and their applications for electrocatalytic oxidation of methanol. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.06.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Sun CL, Tang JS, Brazeau N, Wu JJ, Ntais S, Yin CW, Chou HL, Baranova EA. Particle size effects of sulfonated graphene supported Pt nanoparticles on ethanol electrooxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.099] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|