Asian Journal of Research in Chemistry

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3,3,3-Trifluoropropyltrimethoxysilane (TFPTMS) Sol-Gel-Coated Aluminum Specimens: Influence of Sol-Gel Preparation Medium on Coating Properties


Affiliations
1 Department of Chemistry, The University of Memphis, Memphis, TN 38152, United States
2 Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, United States
     

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Coating a component/structure is, arguably, the most common corrosion protection method, with organic barrier coatings being the most widely used variant. Many concerns have been raised about these coatings; for example, they are not biodegradable and emit volatile organic compounds. Thus, there is interest in a new generation of organic barrier coatings. This type of coating is the subject of the present study, which involved 1) application of coatings prepared from 3,3,3-trifluoropropyltrimethoxysilane (TFPTMS) sol-gel, using both an organic solvent (ethanol solution) and an aqueous solution, to Al specimens; and 2) characterization of the coatings. The influence of sol-gel preparation medium (ethanol solution versus aqueous solution) and post-coating treatment method (drying versus curing) on an assortment of coating properties, such as corrosion resistance in NaCl solution and contact angle in water, was determined. The most corrosion-resistant coating was obtained using an aqueous TFPTMS sol-gel and curing of the coated specimen at 105°C for 24 h.

Keywords

Sol-Gel Coating, 3,3,3-Trifluoropropyltrimethoxysilane, IR Spectra, Electrochemistry, Corrosion Performance, Contact Angle.
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  • 3,3,3-Trifluoropropyltrimethoxysilane (TFPTMS) Sol-Gel-Coated Aluminum Specimens: Influence of Sol-Gel Preparation Medium on Coating Properties

Abstract Views: 494  |  PDF Views: 3

Authors

Ying-Sing Li
Department of Chemistry, The University of Memphis, Memphis, TN 38152, United States
Gladius Lewis
Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, United States
N. E. Vecchio
Department of Chemistry, The University of Memphis, Memphis, TN 38152, United States
Johnny Yang
Department of Mechanical Engineering, The University of Memphis, Memphis, TN 38152, United States

Abstract


Coating a component/structure is, arguably, the most common corrosion protection method, with organic barrier coatings being the most widely used variant. Many concerns have been raised about these coatings; for example, they are not biodegradable and emit volatile organic compounds. Thus, there is interest in a new generation of organic barrier coatings. This type of coating is the subject of the present study, which involved 1) application of coatings prepared from 3,3,3-trifluoropropyltrimethoxysilane (TFPTMS) sol-gel, using both an organic solvent (ethanol solution) and an aqueous solution, to Al specimens; and 2) characterization of the coatings. The influence of sol-gel preparation medium (ethanol solution versus aqueous solution) and post-coating treatment method (drying versus curing) on an assortment of coating properties, such as corrosion resistance in NaCl solution and contact angle in water, was determined. The most corrosion-resistant coating was obtained using an aqueous TFPTMS sol-gel and curing of the coated specimen at 105°C for 24 h.

Keywords


Sol-Gel Coating, 3,3,3-Trifluoropropyltrimethoxysilane, IR Spectra, Electrochemistry, Corrosion Performance, Contact Angle.