Influence of Boron Addition on the Microstructure and the Corrosion Resistance of CoCrMo Alloy

Marco Hernandez-Rodriguez, Dionisio Laverde-Cataño, Diego Lozano, Gabriela Martinez-Cazares, Yaneth Bedolla-Gil

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
108 Downloads (Pure)


Cobalt-based alloys are extensively used in orthopedic applications for joint replacements due to their wear and corrosion resistance. Corrosion, however, is often associated with fatigue failure in these orthopedic devices. In this study, the effect of boron addition on the corrosion behavior of CoCrMo alloys was studied using linear polarization resistance, potentiodynamic polarization curves, electrochemical impedance spectroscopy, and cyclic voltammetry. The samples were analyzed under as-cast and heat treatment conditions after 21 days of immersion in phosphate-buffered saline (PBS) solution at 37 °C. The boron addition increased the particle content, while the heat treatment promoted enlargement and even distribution of the precipitates throughout the structure. The corrosion resistance was improved by both boron and heat treatments. The best performance was observed for a heat-treated alloy having a very small amount of boron, which had an increased resistance to corrosive attack. Such behavior was attributed to the homogenized microstructure achieved by boron and heat treatment that helped to form a stable passive layer of chromium oxide which endured the 21 days of immersion.
Original languageEnglish
Article number307
Pages (from-to)307
Issue number3
Publication statusPublished - 1 Mar 2019

Bibliographical note

Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.

Copyright 2020 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • General Materials Science


Dive into the research topics of 'Influence of Boron Addition on the Microstructure and the Corrosion Resistance of CoCrMo Alloy'. Together they form a unique fingerprint.

Cite this