This is the supplementary material associated with the article: F. González, D. Greiner, V. Mena, R. M. Souto, J. J. Santana, J. J. Aznárez, Fitting procedure based on Differential Evolution to evaluate impedance parameters of metal-coating systems, Engineering Computations. This article can be found at DOI: 10.1108/EC-11-2018-0513 On the compressed file, the open codes in C++ language for DE and SaDE algorithms are included on the corresponding folders prepared for compiling with GNU compiler (Stallman 2012). Examples of input and output files for each algorithm are also included. The call graph between functions are depicted on Figure A1 for each algorithm, (a) DE and (b) SaDE. On the other hand, executable files and simulation examples included in this work are also included in the compressed file, and structured according to the cases (Sections 4.1 and 4.2, respectively).