Synthesis and properties of sol-gel based corrosion resistant nanocomposite coating

Aruna, ST and Supriya, Nirmalkar (2013) Synthesis and properties of sol-gel based corrosion resistant nanocomposite coating. In: National Conference on “Scope of Advanced Materials in Energy & Environment, 2013-08-07, CMR Institute of Technology.

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AA2024-T3 aluminium alloy is widely used in aircraft and aerospace industries because of its high strength to weight ratio. Due to the presence of intermetallic compounds in aluminum alloy they are more sensitive to localized corrosion after exposure to aggressive environments. Historically, chromate conversion coatings were used to prevent corrosion of aluminum alloys. But the presence of toxic hexavalent chromium compounds makes those coatings very hazardous to the environment. Among the various approaches employed as replacements, the sol-gel process is considered to be a promising alternative. Sol-gel coatings are mainly organic-inorganic hybrid materials in which the organic part improves the adhesion at the metal/coating interface and the inorganic part increases the hardness of the coating. Incorporation of corrosion inhibitors into the sol-gel films can improve the corrosion protection ability of the coatings.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Nanocomposite coating;Glycidoxypropyltrimethoxysilane (GPTMS);Tetraethoxysilane (TEOS);Combustion synthesis;Hydrothermal synthesis
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mrs Manoranjitha M D
Date Deposited: 23 Jul 2015 07:47
Last Modified: 23 Jul 2015 07:47

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