METHOD AND DEVICE FOR SIMULATION ANALYSIS FOR ELECTRIC PROTECTION FIELD

摘要

PROBLEM TO BE SOLVED: To carry out analysis with consideration for the state of polarization of a counter electrode by determining shifted polarization characteristic with consideration for the portion of output voltage of an external power unit with respect to the polarization characteristic of a counter electrode to be inputted, using this characteristic as boundary condition in the counter electrode, and performing numerical analysis by the use of a finite element method, etc. SOLUTION: The object of analysis is an electric protection field where a corrosion protection current is allowed to flow from a counter electrode 4 to an object 3 of corrosion protection by a constant voltage generator 14. In this case, shifted polarization characteristic where, with respect to the previously determined polarization characteristic of the counter electrode 4, the electric potential of the polarization characteristic in which signs of electric potential are reversed is shifted to the noble potential side by the portion of output voltage of the constant voltage generator 14. Simultaneously, with respect to the polarization characteristic of the object 3 of corrosion protection, the reverse polarization characteristic of the object of corrosion protection in which signs of electric potential are reversed is determined. While using the shifted polarization characteristic and the reverse polarization characteristic of the object of corrosion protection as boundary conditions in the model parts corresponding to the counter electrode 4 and the object 3 of corrosion protection, respectively, analysis is carried out by a numerical analysis means and a solution is obtained.