Abstract: The structural health of a structure such as an aircraft is monitored by spraying a paint formulation containing a loading of carbon nanopartides to provide a paint layer forming part of a paint system. The paint layer forms a smart skin whose electrical properties may be monitored to determine structural health.
said paint layer, thereby to determine an indication of the structural health of
said structure.
19. A paint formulation for use in a method according to any of claims
1 to 16, comprising a dispersion of carbon nanotubes in a sprayable resin or
5 polymeric material.
20. A method of producing a paint formulation for use in a method
according to any of claims 1 to 16, which comprises providing a liquid
component of an aerospace paint system and dispersing therein an amount of
carbon nanoparticles.