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Sol-Gel Coating of Alumina on Stainless Steel (304L) Substrate and its property


Affiliations
1 School of Mines and Metallurgy, Kazi Nazrul University, Asansol-713340, India
     

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Sol gel coating over steel or stainless steel as substrate is important in terms of wear, hardness, high temperature stability and chemical resistance. For good quality coating it is vital that adhesive strength/bonding, surface preparations are needed to be focussed. Al-isopropoxide is used as the main precursors in water (proper mixing) followed by proper pH maintenance at around 3 with Nitric acid addition. Proper pH aids in deagglomeration among particulates at optimum temperature and soaking period. Sol is converted to gel by evaporation while coating of Al-isopropoxide over stainless steel substrate is carried by repeated vertical dipping. Annealing is carried at 600°C, 900°C and 1200°C for 2 hours in inert Nitrogen atmosphere.

Keywords

Sol-Gel, Alumina, Stainless Steel, Surface Morphology, Phase Analysis.
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  • Sol-Gel Coating of Alumina on Stainless Steel (304L) Substrate and its property

Abstract Views: 410  |  PDF Views: 3

Authors

Soumya Mukherjee
School of Mines and Metallurgy, Kazi Nazrul University, Asansol-713340, India

Abstract


Sol gel coating over steel or stainless steel as substrate is important in terms of wear, hardness, high temperature stability and chemical resistance. For good quality coating it is vital that adhesive strength/bonding, surface preparations are needed to be focussed. Al-isopropoxide is used as the main precursors in water (proper mixing) followed by proper pH maintenance at around 3 with Nitric acid addition. Proper pH aids in deagglomeration among particulates at optimum temperature and soaking period. Sol is converted to gel by evaporation while coating of Al-isopropoxide over stainless steel substrate is carried by repeated vertical dipping. Annealing is carried at 600°C, 900°C and 1200°C for 2 hours in inert Nitrogen atmosphere.

Keywords


Sol-Gel, Alumina, Stainless Steel, Surface Morphology, Phase Analysis.

References





DOI: https://doi.org/10.24906/isc%2F2019%2Fv33%2Fi3%2F185423