No coin nor oath required. For personal study only.
the thermal and rheological properties of the powder coatings and this would be of crucial relevance to support the interpretation of the mechanisms involved in the formation of the quality appearance and in the build up of the overall mechanical properties of the coatings themselves. Scratch resistance of the coatings is related to the intensity and, mostly, to the exposure time of the IR radiation during the precuring of the basecoats. Samples with the basecoat pre-cured longer or oven-baked are less penetration resistant and possess a reduced recover capability because of the inferred 'discontinuity' between the topcoat and basecoat. The coating with both topcoat and basecoat oven-baked is ductile enough to withstand higher deformations during the scratch tests without showing significant failures. Short exposure time and high IR radiation intensity does not affect the reactivity of resin inside the outermost layers of the basecoats. Basecoats pre-cured for shorter exposure time can be inferred to allow a 'coherent' cross-linking pattern between basecoat and topcoat, which is supposed to lead to a better scratch resistance.
Article by M Barletta et al, entitled "Scratch resistance of 'fast-cured' metal flake powder coatings" published in Progress in Organic Coatings, Feb 2010, 67 (2), 161-169
π SIMILAR VOLUMES
This paper reviews studies of the performance of polymeric, metallic and ceramic including diamond coatings on steel and ceramic substrates when subjected to waterαsand jet impingement erosion conditions. The coatings tested have been deposited by the thermal spray, electroless plating, PVD and CVD