Anticorrosive evaluation of copper-iron mixtures processed by powder metallurgy
Bautista-Ruiz, Jorge | 2021
Through the powder metallurgy process, copper and iron powders were mixed in the proportions Cu between 15% to
75% and iron from 25% to 85% that made up the binary material systems. Material systems were topographically
characterized with atomic force microscopy. Corrosion tests were established using potentiodynamic polarization
curves. The worn surfaces' characterization was carried out by means of a Confocal Scanning Laser Microscope to
complement the study. It was determined that the mixtures' stability and behaviour have different behaviours
depending on the evaluated system because the wear system caused, indicating that the phenomenon can be additive.
The corrosive phenomenon is dominantly affected by the microstructure of the material. From the results found, it is
possible to infer that the best systems evaluated by corrosive contain the highest percentage of copper content. The
topographic variation indicates the transition from the active zone to the passive zone of the metal due to
electrochemical reactions in the presence of aggressive media.