Abstract
The combined corrosion–wear of powder metallurgy duplex stainless steels obtained by the mixing of ferritic and austenitic powders in several proportions was studied. All the materials were sintered in a nitrogen atmosphere. Tribological and tribocorrosion behaviour was analyzed using a pin-on-disc. Electrochemical techniques: open circuit potential measurements, potentiodynamic polarization measurements and potentiostatic measurements at passive potential under sliding conditions were used. The obtained results were interpreted and related to microstructural features. The tribocorrion behaviour for powder metallurgy duplex stainless steels was a function of the applied electrochemical potential.
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