The knowledge of the properties of the coatings in terms of scratch and wear resistance is of paramountimportance in order to prevent the formation of severe damages.Nonetheless, dealing with the evaluationscratch or wear resistance of an organic coating can be troublesome. They can be strongly dependent onthe status of the organic material aswell as on the contact condition, applied load and strain rate. Besides,reliable responses cannot be achieved if an appropriate experimental design and a combined usage ofproper equipments is not scheduled. In this respect, the present analysis deals with the application ofvariable speed and load scratch tests to characterize the scratch response and wear resistance of bilayermetal flakes powder coatings. Experimental findings allowed the achievement of consistent trends of thedeformation response vs. curing temperature, scratch load and speed aswell as their empirical modelling.Thisway, the overall scratch resistance of the bilayer coatings could be usefully predicted on a broad rangeof operational conditions, thus providing helpful indications to paint manufacturers and coaters on howto best deal with the application of metal flake powders.
Influence of scratch load and speed in scratch tests of bilayer powder coatings / M., Barletta; A., Gisario; G., Rubino; Lusvarghi, Luca. - In: PROGRESS IN ORGANIC COATINGS. - ISSN 0300-9440. - STAMPA. - 64:2-3(2009), pp. 247-258. [10.1016/j.porgcoat.2008.09.007]