Experimental Studies on Adherence Resistance of Thermally Sprayed Metallic Coatings

The paper aims to determine, through experiments, the necessary force for detaching the deposited layer (SD) from the support layer (SB). The thermal sprayed coating was formed by successive deposition of two sub-layers, one for anchorage and the second for corrosion resistance. Shear adhesion strength tests were performed on a specialized stand, while force (F_ad) and displacement (x) values were recorded with a data acquisition system. The variation curves, F_ad = f (x), outline the evolution of the detachment process of the sprayed layer and the two main components of the deformation process: slip and breakage.