Demonstration Of A Nanomaterial-Modified Primer For Use In Corrosion-Inhibiting Coating Systems
Year: 2011
Type: other
Abstract: This Office of the Secretary of Defense Corrosion Prevention and Control project demonstrated and validated the successful use of a modified metallic zinc-containing primer on exterior surfaces of a steel fuel tank and associated piping.The primer contained technically advanced additives consisting of galvanically inactive, electrically conductive fullerene carbon nanotubes (CNTs).This CNT/zinc hybrid primer formulation allowed for reducing the high metallic zinc pigment loading (65-95%) of a traditional zinc-rich primer to provide for better coating application and performance.The hybrid primer (10-30% metallic zinc powder) provides at a minimum the same galvanic protection to scratched or damaged areas as does the traditional zinc-rich primer.If a void in the paint system (i.e., a holiday) develops, corrosion normally initiates at that point.However, when using the CNT/zinc hybrid primer, if a holiday develops, the bare area is still protected by the reduced-load metallic zinc coating that continues to function as a sacrificial anode with increased performance due to the conductivity of the CNTs.Studies have demonstrated that traditional zinc-rich primer sacrificial coatings can provide the best protection to steel for 20-50 years or more.This demonstration/validation (dem/val) project supports the claim that the CNT/zinc hybrid primer can provide the same level of corrosion protection and be easier to apply when compared to traditional metallic zinc-rich primer systems.
Authors: Susan A. Drozdz, Todd Hawkins, Larry Clark, Michael W. Surratt, Joshua Kingsley, Karl Palutke, James Dean
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W157792084