Development Options for Coronary Stent Coatings

Abstract

Abstract In our research we investigated the effect of different surface qualities on the adhesion of polylactic acid coating on 316L steel. During the study, samples were electropolished and surface treated with aqua regia and Vilella reagent, and the coating was applied by dipping technology using a Yaskawa robot arm. Tribology tests were carried out to determine the adhesion, in addition to the force and friction conditions, the coating damage resulting from the measurements was also recorded. In addition to the coating adhesion assay, contact angle measurements were also performed. Based on our measurement results, it was found that compared to the three different surface treatment methods, the surface of the samples treated with Villella was more adherent to the polymer than to the conventional electropolished surface. In this case, the frictional force was also much lower than that of the polished specimens, therefore this surface treatment method may be suitable for improving the adhesion of the coating.