Kim, S., Lee, S., Park, B., Kim, S. et al., "A Comparative Study of Non-Asbestos Organics vs. Low Steel Lomets for Humidity Sensitivity," SAE Technical Paper 2012-01-1788, 2012, doi:10.4271/2012-01-1788.
Non-Asbestos Organic (NAO) disc pads and Low Steel Lomet disc pads were subjected to high and low humidity conditions to discover how humidity affects these two classes of formulations for physical properties, friction, wear and noise characteristics. The 2 classes of formulations show similarities and differences in response to increasing humidity. The humidity effect on deformation of the surface microstructure of the gray cast iron disc is also investigated. Humidity implications for pad quality control and brake testing are discussed.