DETERMINATION OF THE CORROSION RATE OF AZ31B MAGNESIUM ANODIZATION LAYER WITH ELECTROCHEMICAL METHOD AND FINITE ELEMENT METHOD SIMULATION

• Main Author: Faris Hafiz, Gifar
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50506
• Institution: Institut Teknologi Bandung

In the medical device industry, the use of biodegradable implants including magnesium is increasing. However, to design a magnesium alloy as an implant, the rate of degradation needs to be controlled. One of the ways is to control the rate of degradation of magnesium alloys is by pulse anodization. In this study, the pulse period was varied to determine its effect on the corrosion rate and the characteristics of the coating layer. Observation of the microstructure and hardness testing of the anodic layer was carried out to determine the characteristics of the formed layer. Then, OCP and Tafel tests were carried out to measure the rate of corrosion. So that, it can be seen the effect of the pulse period. The smaller the period used, the denser and harder the oxide layer will be. The corrosion rate is also lower when the period used is getting smaller. Then, the stress effect that is simulated with a finite element simulation, will result in stress concentrations in the defect area which can lead to an increased tendency for corrosion to occur at a faster rate.