Resistencia a la corrosión de recubrimientos electroquímicos de cromo y zinc mediante EIE

the corrosion behavior of chromium and zinc industrial coatings was investigated in 3%wt nacl solution using electrochemical impedances pectroscopy technique. in order to determine the mechanisms of proresistance in time function, with the morphology and chemical composition. to do this, we characterized the microstructure of the coatings by scanning electron microscopy, the crystalline phases with x-ray diffrac-tion and chemical composition, before and after exposure to a corrosive environment, by x-ray photoelectron spectroscopy and auger electron spectroscopy. overall, both coatings (cr and zn) showed degradation with the immersion time, due to microstructure defects, however, the protective and failure mechanisms are different for each system. these details are discussed in this research.