Evaluating the Effect of Pretreatment Parameters on Co-Cr-Mo Alloy Prior to Physical Vapor Deposition Coating
Keywords:Pretreatment, PVD, CoCrMo alloy, Surface roughness, Surface morphology
AbstractSurface morphology and surface roughness of substrate are important parameters that determine the quality of physical vapor deposition (PVD) coating. Various methods are adopted to address this issue and one of them is by using chemical pretreatment. In the present work, an attempt is made to study the effect of pretreatment parameters, namely temperature and time, using two types of acids on surface morphology of Co-Cr-Mo alloy. The surface roughness Ra is the independent response variable. Experimental results show that higher surface roughness was obtained at temperature of 50ËšC and time of 30 seconds when etched using HCl + HNO3 + Acetic acid + H20. However, temperature of acids and time of etching are involving, to obtain the optimum situation of substrate surface prior to PVD coating.
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