EFFECT OF VOLTAGE AND TEMPERATURE OF ANODIZED MAGNESIUM AZ31B AND TESTING OF ITS CORROSION RESISTANCE IN RINGER’S SOLUTION

• Main Author: Fatkhan Alaydrus, Said
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49465
• Institution: Institut Teknologi Bandung

Magnesium is one of the materials used for implants because it is light, strong and biocompatible in the human body. These advantages of magnesium does not make it the top choice for implants in general due to its very poor corrosion resistance properties. Therefore, surface modification of magnesium is needed in order to reduce its corrosive properties. The surface modification process is carried out by anodizing. Anodization was performed using a mixed electrolyte solution of Ca (OH)2 and NaOH with process parameters of 8V, 10V and 15V anodization voltages. Anodization was carried out for 30 minutes followed by sealing. The anodization treatment will produce an oxide layer which will become a barrier layer for direct reaction between the corrosive solution and magnesium. Therefore, a simulation was carried out to determine the distribution of the anodized oxide layer at various temperatures. In this study, the results showed that the addition of anodizing voltage was effective in slowing down the corrosion rate of magnesium and the sealing process would further slowing down the rate of magnesium corrosion too. Anodizing voltage of 15V indicates the lowest corrosion rate, indicating that the oxide layer formed is the thickest layer. The simulation of the distribution of the oxide layers also shows that the lower temperature will flatten the surface of the oxide layer.