@misc{lutz_corrosion_behaviour_2011, author={Lutz, J.,Diaz, C.,Garcia, J.A.,Blawert, C.,Maendl, S.}, title={Corrosion behaviour of medical CoCr alloy after nitrogen plasma immersion ion implantation}, year={2011}, howpublished = {journal article}, doi = {https://doi.org/10.1016/j.surfcoat.2010.11.017}, abstract = {Surface treatment of medical CoCr alloys L605 by nitrogen plasma immersion ion implantation (PIII) leads to the formation of a hard and wear resistant surface layer, consisting of nitrogen in solid solution. However, a detailed investigation of the corrosion properties by potentiodynamic polarization and electrochemical impedance spectroscopy shows that even at processing temperatures of 350 °C, where no CrN precipitates are observed, no complete passivation of the surface by formation of a protective Cr2O3 layer is possible leading to enhanced corrosion rates further increasing with increasing PIII processing temperature. It is postulated that the enhanced affinity of chromium for nitrogen leads to a reduced mobility inside the alloy, thus prohibiting a timely surface passivation. Nevertheless, a surface modification where a moderate decrease in corrosion resistance coupled with a significant reduction in generated wear particles should be feasible for biomedical applications.}, note = {Online available at: \url{https://doi.org/10.1016/j.surfcoat.2010.11.017} (DOI). Lutz, J.; Diaz, C.; Garcia, J.; Blawert, C.; Maendl, S.: Corrosion behaviour of medical CoCr alloy after nitrogen plasma immersion ion implantation. Surface and Coatings Technology. 2011. vol. 205, no. 8-9, 3043-3049. DOI: 10.1016/j.surfcoat.2010.11.017}}