MAGNESIUM COATING USING COMPLEX TANIC ACID/FE FOR INCREASING CORROSION RESISTANCE AS BONE IMPLANT

• Main Author: Tegar Cahyo L, Bonivasius
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50229
• Institution: Institut Teknologi Bandung

Traffic accident is one of the most important problems in the world that can cause bone fracture. Some condition of fractures require the victim to use the implant. The use of an bioinert material for bone implants poses a new problem, namely the postoperative need to remove the implant as the bone grows. Post-operative surgery can generate trauma from accidents and also increase costs. Therefore, further research on the feasibility of magnesium as a biocompatible material is carried out due to its mechanical properties which are similar to real bone so as to avoid stress shielding. The use of magnesium as an implant can solve postoperative surgical problems because magnesium can be degraded in the human body thus can be used as temporal bone. The use of magnesium as temporal bone also creates other problems because the corrosion rate of magnesium is very high, therefore further treatment is needed. In this research, magnesium was coated using tanic acid (TA)/Fe complex to increase the corrosion resistance of magnesium. Immersion tested was carried out with the result of an increase in mass due to the deposition of hydroxyapatite which can increase corrosion resistance. SEM characterization performed showed that the TA / Fe layer was formed on AZ31B magnesium surface because the chelate bond between TA and the magnesium, that bond was stabilized by Fe3+ using cross-linking between TA hydroxyl groups.