Abstract
Surface degradation is a recurring problem commonly witnessed in nanocomposite coatings which are susceptible to prolonged exposure to environmental elements such as sunlight, moisture, and oxygen. The inherent properties of paint such as flash point, pour point, viscosity, thermal conductivity, glossiness and drying time are examined in the current research study for a better understanding of the causative factors for the degradation of the coating application. An analysis of the surface morphology is undertaken with the help of atomic force microscopy and upright microscopy. In an endeavour to limit surface degradation and retain the initial properties of the chosen coating, multiwall carbon nanotubes (MWCNTs) are included with the paint. Subsequently, the coated surface is subjected to UV light and exposed to salt fog environment for varying periods of time. On the other hand, very few cracks are observed on the composite samples coated with MWCNT incorporated paint. The obtained test results clearly indicate that when the samples are subjected to UV exposure as well as salt fogging, there is a reduction in the thickness of the paint coating up to 1.35% with 0% CNTs while it is a nominal 0.275% with a 1% MWCNT coating. Therefore, it is evident that the inclusion of MWCNTs in polymeric coatings halts the extent of UV degradation, brings down the number of surface cracks, safeguards the film thickness and consequently extends the lifespan of the nanocomposite paint coating.
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Abbreviations
- K :
-
Thermal conductivity (W/m K)
- Q :
-
Amount of heat transferred through the material in (J/s or W)
- L :
-
Distance between the two isothermal planes
- A :
-
Area of the surface (m2)
- ΔT :
-
Temperature difference (K)
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Acknowledgements
Author wish to thank the Robotics lab, department of mechanical engineering at SRMIST for Robot coating facility to conduct the Nanopainting work.
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All authors contributed to the study conception, materials selection, Coating. Material coating preparation, data collection and analysis were performed by [RVSkJ]. The first draft of the manuscript was written and verified by [RVSkJ and PS]. All authors read and approved the final manuscript.
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Jakkula, R.V.S.k., Sethuramalingam, P. Enhanced Coating Layer Resistance to Corrosion and UV Degradation with Robotic Nanospray Painting. Arab J Sci Eng 48, 11913–11926 (2023). https://doi.org/10.1007/s13369-023-07612-3
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DOI: https://doi.org/10.1007/s13369-023-07612-3