Corrosion protection of surfaces by nanocomposite and urethane top coatings

Ramazan Asmatulu; Richard O. Claus; J. B. Mecham; S. G. Corcoran

doi:10.1117/12.601241

16 May 2005 Corrosion protection of surfaces by nanocomposite and urethane top coatings

Ramazan Asmatulu, Richard O. Claus, J. B. Mecham, S. G. Corcoran

Proceedings Volume 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics; (2005) https://doi.org/10.1117/12.601241
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

In the present study, nanosized silica particles (~100 nm) were incorporated into epoxy polymers, and then sprayed on molybdenum treated Al coupons (2024-T3) by a nozzle spray unit at different thicknesses. A urethane top coating (1 mil) was also applied on some of the initially coated surfaces. The main purpose of the SiO₂ and urethane was to absorb/block unwanted ions/molecules (i.e., Cl^-, O, OH^-, H₂O, etc.) and increase the coating performance. Several corrosion tests including electrochemical impedance spectroscopy (EIS), salt spray and salt soaking were conducted on the prepared samples using a 0.5 M NaCl solution. The Al coupons coated with such nanocomposites and a urethane top coating showed excellent coating resistances (8x10⁹ ohm-cm²) against corrosion attack. As a result, it is assumed that this novel coating system will allow coating industry to effectively protect the surface of materials.

Citation Download Citation

Ramazan Asmatulu, Richard O. Claus, J. B. Mecham, and S. G. Corcoran "Corrosion protection of surfaces by nanocomposite and urethane top coatings", Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); https://doi.org/10.1117/12.601241

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