Thermal History Paints

SCS Thermal History Paints (THPs) are formulated to enable accurate thermal profiling whilst being easy to apply using the same air spraying process as many common paints. They can be employed as an alternative to the Thermal History Coatings when more specialist deposition techniques are not necessary, are too costly or are unsuitable, for example when large areas require coverage.

What are Thermal History Paints?

The THPs are a paint embodiment of SCS’s innovative thermal history technology for temperature sensing of surfaces. The combination of the robust SCS sensor materials with high temperature binders mean that SCS Thermal History Paints offer reliable surface temperature profiling along with simple, low-cost application. After application to the chosen surface, the active sensor material in the paint records the peak operating temperature across the coating. The inherent luminescence in the sensor material is permanently changed by the thermal exposure. These changes are detected purely by the non-destructive excitation and capture of the luminescence light with automated instrumentation. Scanning the measurement device provides accurate temperature profiles over the surface. Also, since the changes are permanent, the information can be retrieved at any suitable time, for example during a scheduled maintenance procedure.

The Thermal History Paints provide a durable adherent layer for temperatures up to 900°C; however for more challenging applications please see Thermal History Coatings….







What are the advantages of using the SCS Thermal History Paint technology?
  • Wide temperature range covered with only few coating types: The active components of the THPs allow the continuous measurement of temperatures between 300°C and 900°C, with potential to go further (in contrast to existing thermal paints which only indicate discrete temperature values).
  • Temperature accuracy to about ±5-10°C: The SCS Thermal History Paints have shown temperature accuracy between 5°C and 10°C over the whole dynamic temperature range.
  • Simple application of paint using air spraying
  • Automated and objective temperature reading: Surfaces are interrogated at room temperature after exposure. The readout is done using specialised optical instrumentation, developed by SCS. Unlike existing thermal paints, the readout is objective and can be automated for full 2D profiling of complete, complex individual components or assemblies.
  • In-situ measurements possible: The SCS Thermal History Paints can be interrogated in-situ, without the need for dismantling of the components or assemblies. Furthermore, the interrogation does not require a controlled lighting environment in contrast to existing thermal paints, and can therefore be performed as a borescope-type interrogation outside controlled laboratory conditions.
  • REACH: In contrast to existing thermal paints the SCS Thermal History Paint technology does not contain hazardous materials  which are restricted by the European Union regulation concerning the Registration, Evaluation, Authorisation & restriction of Chemicals.
Is the technology available?

The technology is under development in collaboration with a number of international OEMs and governmental funding organisations. SCS aims to have a commercially available paint and measurement device by mid-2013.