Elektrolit içerisindeki bor miktarının PEO ile kaplanan Ti45Nb'nin korozyon özelliklerine etkisi

Abstract

Developing more biocompatible biomaterials with mechanical properties similar to those of cortical bone has long been a challenge for scientists. They are still working on new alloys and coating processes to meet this challenge. Among these biocompatible materials, ß-titanium alloys, which will prevent stress-shielding and have a Poisson’s ratio very close to the cortical bone, have been attracting the attention of scientists for a long time. In addition to this, the PEO method, which makes it possible to embed ions into the oxide layer, has also come to the fore in recent years as a surface treatment in order to increase the corrosion resistance, wear resistance and biocompatibility of biomaterials and also to provide antibacterial/antimicrobial properties. In this study, Ca and P-containing oxide layers with two different boron content and no boron content were successfully formed on Ti45Nb ß-titanium alloy substrate by using the PEO method. Surface characterization and corrosion resistance tests of these layers were carried out. The obtained results were compared with each other and with the uncoated substrate. XRD analysis showed that the coatings are primarily composed of two major polymorphs of TiO2, anatase and rutile. Static electrochemical measurements were made in diluted Foetal Bovine Serum (FBS) and hydrogen peroxide added serum. H2O2 was added to simulate the inflammatory state in the body. The measurements showed that all the coated samples had lower corrosion current densities compared to the uncoated ones both in serum and H2O2-added serum.