Study of influence of natural stone surface roughness on wetting characteristics for the application of liquid coating systems and on the adhesive strength of thin epoxy coatings over natural stone substrates

In this work, the influence of surface roughness of a natural stone material on two important parameters for the performance of the industrial coating process will be studied. The selected parameters are contact liquid drop angle, to assess the best conditions for the application of the liquid coatings, and the adhesion strength, to assess the best coating performance once the coating has been applied and dried. These two parameters are quantitative and may allow the comparison between different case studies. The study of influence will be addressed in this work from a practical point of view, so that results can be applied in a current industrial process for optimization purposes. The obtained conclusions are expected to be used to propose recommendations for the stone industry to guarantee the performances of the coating systems applied.