Parametric study of the grit blasting technique as a susface activation method prior to coating processes by thermal spraying
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AuthorTomás Olmos, Pedro Antonio
Director/aConde del Teso, José; López y Matín Wenzelburger, Daniel
CenterEscuela Técnica Superior de Ingeniería Industrial
Knowledge AreaIngeniería de Sistemas y Automática
The aims of the study were to carry out a comparison of grit blasting and other surface pretreatment processes and identify the relation between grit blasting parameters and coating adhesion, because it can be assumed that the adhesion between substrate and coating strongly depends on the physical properties of the substrate surface. By this way, in order to improve the bonding between substrate and coating, it is necessary to study the influence of different surface pre-treatment parameters and to compare different pre-treatment techniques. Grit blasting, water jet blasting and mechanicals processes (milling and grinding) have been studied. In order to compare them, the roughness of the surface, the adhesive straights, the topography, the contact surface and the residual stresses have been the considered parameters to carry out the research. Two different substrates have been studied, AlMg7 and St_42. For grit blasting, five different blasting parameters have been analyzed ...
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