MATHEMATICAL MODELING AND NUMERICAL SOLUTION OF IRON CORROSION PROBLEM BASED ON CONDENSATION CHEMICAL PROPERTIES

Corrosion process is a natural phenomenin that occurs with the various metals, where the corrosion process in electrochemical environment can be explained by using a galvanic cell. The iron corrosion process is based on the acidity degree (pH) of a condensation, iron concentration and condensation temperature of electrolyte. These are applied at electrochemistry cell. The iron corrosion process at this electrochemical cell also is able to generate electrical potential and electric current during the process. This paper considers how to build a mathematical model of iron corrosion based on electrical potential and electric current. The mathematical model further is solved using the finite element method. The iron corrosion model is built based on the iron concentration, condensation temperature, and iteration time applied. In the electric current density model, the current is generated between the cathode and anode poles and the iteration time applied. Whereas the potential electric model, is based on the electric potential and the iteration time applied. The numerical results show that the part of iron sample, attacked by corrosion, is a function of time, depth difference, iron concentration, condensation temperature and the sum of reduced mass during corrosion process.