ANALYSIS THE CORROSION CHARACTERISTICS OF MAGNESIUM AZ31B ANODIZED BY EXPERIMENT AND SIMULATION

• Main Author: Danni Rachman, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50382
• Institution: Institut Teknologi Bandung

The presence of pores in the anodic layer of magnesium as an implant greatly affects the rate of corrosion. One of the parameters of the pulse anodization that can be varied is the duty cycle, the time of the anodization in one period. Therefore, this pulse anodization experiment is needed to determine the effect of duty cycle parameter on the AZ31B corrosion rate. Then a magnesium corrosion simulation can be performed to understand its corrosion behavior. AZ31B magnesium was treated with pulse anodization, with variations in the duty cycle of 40%, 60%, and 80%. Sealing is done afterwards. Testing of open circuit potential and Tafel polarization was carried out to determine the corrosion characteristics. The simulation at COMSOL was carried out to understand the corrosion behavior of magnesium and its anodic coating. The results showed a decrease in the corrosion rate of AZ31B with increasing the value of duty cycle. The addition of sealing also succeeded in reducing the corrosion rate. The thickness of the anodic layer as well as pores and cracks were proven to be influenced by these two treatments. Simulations at COMSOL also confirmed that the anodic coating reduces the corrosion rate of magnesium.