Tania Octavia Harahap, Surya Hardi, Fahmi Fahmi, Krismadinata, Syafii
The integrity of grounding systems in electrical substations is highly influenced by environmental factors such as soil composition, pH, salinity, moisture content, and temperature, including the electric vehicle charging System. One of the major issues affecting these systems is corrosion, particularly in coastal or high-salinity regions. This study aims to estimate the rate of soil-induced corrosion by analyzing current density differences in grounding electrodes. The approach integrates numerical simulations using software to evaluate the electrochemical behavior of buried electrodes. The corrosion rate is calculated based on variations in current density influenced by changes in soil salinity and moisture levels. The highest cathode current density of 0.55 A/m2 was observed at 2% salinity. These cathodes of current density values remained stable within a humid range of 0.89 to 0.92. Results indicate that increasing salinity and moisture content significantly elevate the current density, thereby accelerating the corrosion rate. This estimation method provides a predictive tool for assessing corrosion risks in grounding systems, enabling better material selection and maintenance planning for substations exposed to aggressive environments. © 2025 IEEE.
Universitas Sumatera Utara, Department of Electrical Engineering, Medan, Indonesia; Universitas Negeri Padang, Department of Electrical Engineering, Padang, Indonesia; Universitas Andalas, Department of Electrical Engineering, Padang, Indonesia
