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Proceedings Paper

Corrosion protection of surfaces by nanocomposite and urethane top coatings
Author(s): Ramazan Asmatulu; Richard O. Claus; J. B. Mecham; S. G. Corcoran
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Paper 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.

Paper Details

Date Published: 16 May 2005
PDF: 12 pages
Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); doi: 10.1117/12.601241
Show Author Affiliations
Ramazan Asmatulu, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)
NanoSonic Inc. (United States)
J. B. Mecham, NanoSonic Inc. (United States)
S. G. Corcoran, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 5761:
Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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