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Jianlin Sun, Boyuan Huang, Jiaqi He, Erchao Meng, and Qianhao Chang, Achieving oxidation protection effect for strips hot rolling via Al2O3 nanofluid lubrication, Int. J. Miner. Metall. Mater.,(2022). https://doi.org/10.1007/s12613-022-2493-5
Cite this article as:
Jianlin Sun, Boyuan Huang, Jiaqi He, Erchao Meng, and Qianhao Chang, Achieving oxidation protection effect for strips hot rolling via Al2O3 nanofluid lubrication, Int. J. Miner. Metall. Mater.,(2022). https://doi.org/10.1007/s12613-022-2493-5
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  • Research Article

    Achieving oxidation protection effect for strips hot rolling via Al2O3 nanofluid lubrication

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    • It was discovered the application of Al2O3 nanofluid as lubricant for steel hot rolling could synchronously achieve oxidation protection of strips surface. The underlying mechanism was investigated through hot rolling tests and molecular dynamics (MD) simulations. The employment of Al2O3 nanoparticles contributed to significant enhancement in the lubrication performance of lubricant. The rolled strip exhibited the best surface topography that the roughness reached lowest with the sparsest surface defects. Besides, the oxide scale generated on steel surface was also thinner, and the ratio of Fe2O3 among various iron oxides became lower. It was revealed the above oxidation protection effect of Al2O3 nanofluid was attributed to the deposition of nanoparticles on metal surface during hot rolling. A protective layer in the thickness of about 193 nm was formed to prevent the direct contact between steel matrix and atmosphere, which was mainly composed of Al2O3 and sintered organic molecules. MD simulations confirmed the diffusion of O2 and H2O could be blocked by the Al2O3 layer through physical absorption and penetration barrier effect.

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