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Article

Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings

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Department of Mechanical Engineering, Ming Chi University of Technology, Taishan, New Taipei City 243, Taiwan
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Department of Applied Science, R.O.C. Naval Academy, Zuoying, Kaohsiung 813, Taiwan
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Department of Chemical and Materials Engineering, Minghsin University of Science and Technology, Xinfeng, Hsinchu 304, Taiwan
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Department of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, Taiwan
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Department of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, Taiwan
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Chemical System Research Division, National Chung Shan Institute of Science and Technology, Longtan, Taoyuan 325, Taiwan
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Authors to whom correspondence should be addressed.
Academic Editor: Sergey Kidalov
Nanomaterials 2021, 11(6), 1603; https://doi.org/10.3390/nano11061603
Received: 9 May 2021 / Revised: 10 June 2021 / Accepted: 15 June 2021 / Published: 18 June 2021
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. View Full-Text
Keywords: graphene; anti-corrosion; epoxy; infrared stealth graphene; anti-corrosion; epoxy; infrared stealth
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MDPI and ACS Style

Youh, M.-J.; Huang, Y.-R.; Peng, C.-H.; Lin, M.-H.; Chen, T.-Y.; Chen, C.-Y.; Liu, Y.-M.; Pu, N.-W.; Liu, B.-Y.; Chou, C.-H.; Hou, K.-H.; Ger, M.-D. Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings. Nanomaterials 2021, 11, 1603. https://doi.org/10.3390/nano11061603

AMA Style

Youh M-J, Huang Y-R, Peng C-H, Lin M-H, Chen T-Y, Chen C-Y, Liu Y-M, Pu N-W, Liu B-Y, Chou C-H, Hou K-H, Ger M-D. Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings. Nanomaterials. 2021; 11(6):1603. https://doi.org/10.3390/nano11061603

Chicago/Turabian Style

Youh, Meng-Jey, Yu-Ren Huang, Cheng-Hsiung Peng, Ming-Hsien Lin, Ting-Yu Chen, Chun-Yu Chen, Yih-Ming Liu, Nen-Wen Pu, Bo-Yi Liu, Chen-Han Chou, Kai-Hsiang Hou, and Ming-Der Ger. 2021. "Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings" Nanomaterials 11, no. 6: 1603. https://doi.org/10.3390/nano11061603

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