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| Effects of Boron Nitride Nanosheets Modified Anticorrosive Coating on Heat Dissipation Performance of Fin Heatsinks |
| Received:October 12, 2024 Revised:December 10, 2024 |
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| DOI：10.7643/issn.1672-9242.2025.01.013 |
| KeyWord:boron nitride nanosheets heat dissipation coating anti-corrosion coating finned heat sinks thermal conductivity thermal management |
| Author | Institution |
| GAO Yihui |
The 20th Research Institute of CETC, Xi'an , China |
| MU Qi |
The 20th Research Institute of CETC, Xi'an , China |
| ZHAO Wenzhong |
The 20th Research Institute of CETC, Xi'an , China |
| REN Yue |
Technical Institute of Physics and Chemistry, CAS, Beijing , China |
| LI Yong |
Technical Institute of Physics and Chemistry, CAS, Beijing , China |
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| Abstract: |
| The work aims to investigate the effects of thermal conductivity of anti-corrosion coating on the heat dissipation performance of ship borne electronic equipment fin radiators, and improve the heat dissipation efficiency of fin radiators. With hexagonal boron nitride powder as a thermal conductive filler, modified anti-corrosion coatings with different amounts of hexagonal boron nitride were prepared for ship electronic equipment anti-corrosion coatings. The effects of hexagonal boron nitride on the thermal conductivity, adhesion, impact resistance, flexibility, and neutral salt spray resistance of the coatings were studied, and the formulation design was optimized; Finally, based on the above experimental results, the heat dissipation performance of aluminum alloy finned radiators before and after coating with hexagonal boron nitride modified anti-corrosion coatings was studied under different simulated heat source conditions. The thermal conductivity of the anti-corrosion coating on the finned radiator increased with the increase of the mass percentage of hexagonal boron nitride added, reaching its maximum value (λ≈1.03 W.m–1.K–1) at 20wt%, and the mechanical properties reached their optimal value at a dosage of 15wt%; Compared with unmodified anti-corrosion coatings, aluminum alloy radiators coated with hexagonal boron nitride modified anti-corrosion coatings could lower their equilibrium temperature by~5 ℃ under natural convection conditions and heating power of 20 W. By adding hexagonal boron nitride to anti-corrosion coatings, a thermal conductivity network is constructed in the coating, reducing the thermal resistance of the coating and increasing the heat flux density passing through the coating surface, significantly improving the thermal management efficiency of aluminum alloy heat sinks. The above-mentioned high thermal conductivity anti-corrosion coating has good application prospects in the thermal management of shipborne equipment serving in marine environments. |
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