Electronic Theses and Dissertation

Korosi pada pipa baja bawah tanah dapat menyebabkan kebocoran dan kerusakan struktural, sehingga diperlukan sistem perlindungan seperti proteksi katodik anoda korban (sacrificial anode cathodic protection). penelitian ini menganalisis pengaruh resistivitas tanah dan jenis coating terhadap kinerja sistem proteksi menggunakan comsol multiphysics. simulasi dilakukan pada variasi resistivitas 100 Ω.m, 500 Ω.m, dan 1000 Ω.m, dengan menggunakan coating high density polyethylene (hdpe), dan epoxy. hasil menunjukkan bahwa semakin tinggi resistivitas tanah, efektivitas proteksi menurun. coating high density polyethylene dan epoxy mampu meningkatkan kinerja sistem, dengan epoxy memberikan perlindungan terbaik karena mempertahankan potensial pipa dalam batas aman menurut standar nace sp-0169. kata kunci: proteksi katodik, anoda korban, pipa bawah tanah, resistivitas tanah, coating, hdpe, epoxy, comsol multiphysics, metode elemen hingga

Corrosion in underground steel pipes can cause leaks and structural damage, requiring protection systems such as sacrificial anode cathodic protection. This study analyzes the effect of soil resistivity and coating type on the performance of protection systems using COMSOL Multiphysics. Simulations were performed on variations in resistivity of 100 Ω.m, 500 Ω.m, and 1000 Ω.m, using High Density Polyethylene (HDPE) and epoxy coatings. The results show that the higher the soil resistivity, the lower the effectiveness of protection. High Density Polyethylene and epoxy coatings can improve system performance, with epoxy providing the best protection because it maintains the pipe potential within safe limits according to the NACE SP-0169 standard. Keywords: Cathodic Protection, Sacrificial Anodes, Underground Pipes, Soil Resistivity, Coating, HDPE, Epoxy, COMSOL Multiphysics, Finite Element Method.