Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings
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, t...
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/6/1603 |
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| author | Meng-Jey Youh 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 Ming-Der Ger |
| author_facet | Meng-Jey Youh 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 Ming-Der Ger |
| author_sort | Meng-Jey Youh |
| collection | DOAJ |
| description | 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<sup>−11</sup> A/cm<sup>2</sup> 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. |
| first_indexed | 2024-03-10T10:17:21Z |
| format | Article |
| id | doaj.art-2febdd081b7e4e62b27471984ece8ca6 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T10:17:21Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2febdd081b7e4e62b27471984ece8ca62023-11-22T00:41:26ZengMDPI AGNanomaterials2079-49912021-06-01116160310.3390/nano11061603Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy CoatingsMeng-Jey Youh0Yu-Ren Huang1Cheng-Hsiung Peng2Ming-Hsien Lin3Ting-Yu Chen4Chun-Yu Chen5Yih-Ming Liu6Nen-Wen Pu7Bo-Yi Liu8Chen-Han Chou9Kai-Hsiang Hou10Ming-Der Ger11Department of Mechanical Engineering, Ming Chi University of Technology, Taishan, New Taipei City 243, TaiwanDepartment of Applied Science, R.O.C. Naval Academy, Zuoying, Kaohsiung 813, TaiwanDepartment of Chemical and Materials Engineering, Minghsin University of Science and Technology, Xinfeng, Hsinchu 304, TaiwanDepartment of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, TaiwanDepartment of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, TaiwanDepartment of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, TaiwanDepartment of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, TaiwanDepartment of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, TaiwanDepartment of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, TaiwanDepartment of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, TaiwanDepartment of Electrical Engineering, Yuan Ze University, Zhongli, Taoyuan 320, TaiwanDepartment of Chemical & Materials Engineering, Chung Cheng Institute of Technology, National Defense University, Dasi, Taoyuan 335, TaiwanCorrosion 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<sup>−11</sup> A/cm<sup>2</sup> 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.https://www.mdpi.com/2079-4991/11/6/1603grapheneanti-corrosionepoxyinfrared stealth |
| spellingShingle | Meng-Jey Youh 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 Ming-Der Ger Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings Nanomaterials graphene anti-corrosion epoxy infrared stealth |
| title | Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings |
| title_full | Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings |
| title_fullStr | Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings |
| title_full_unstemmed | Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings |
| title_short | Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings |
| title_sort | using graphene based composite materials to boost anti corrosion and infrared stealth performance of epoxy coatings |
| topic | graphene anti-corrosion epoxy infrared stealth |
| url | https://www.mdpi.com/2079-4991/11/6/1603 |
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