THE EFFECT OF COPPER COMPOSITION TO THE CORROSION RESISTANCE OF TI-CU SINTERED ALLOY FOR IMPLANT APPLICATION

• Main Author: CLARISSA MUHARLIE (NIM : 12514015), FIONNA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27336
• Institution: Institut Teknologi Bandung

Biomaterial as a bone implant should have a good corrosion resistance to prevent the disturbance of biological process in the body due to metal ion release on a dangerous level as the implant’s corrosion product and the implant failure due to corrosion after being inside the body for a long time. Titanium which has a good biocompability and corrosion resistance is often used to produce implant. However, titanium implant needs to be alloyed with other metals such as copper which has bactericidal properties to prevent bacterial infection. Further studies on corrosion behavior of Ti-Cu alloy need to be carried out, because there are no related research yet on a broad range of Cu addition. Other than that, copper levels inside the body in excess will be toxic, so the effect of Cu addition on the ion release of Ti-Cu sintered alloy needs to be investigated. <br /> <br /> The trial is started by making Ti-Cu alloy with 0; 0,5; 1; 3; 5; 10; and 20% of copper through powder metallurgy process. Then, the Ti-Cu alloy is observed through Optical Microscope (OM) and Scanning Electron Microscope-Energy Dispersive Spectroscopy(SEM-EDS). The corrosion resistance of the Ti-Cu alloys are then being measured with Electrochemical Impedance Spectroscopy and Tafel Extrapolation method. After that, The ion release of Ti-Cu sintered alloy is measured with Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS). <br /> <br /> The result shows that Ti-Cu sintered alloy with 10% Cu have the best corrosion resistance, since it has the lowest corrosion current density (icorr), which is 122,27 nA/cm2, the highest polarization resistance, which is 15.395 &#937;, and the lowest corrosion rate, which is 2,35 &#956;m/year. Ti-Cu sintered alloy with 10% Cu also has the lowest ion release level, which is 131,63 ppb.