A thorough investigation into the repassivation process of CoCrMo in multiple simulated biological environments has been undertaken, looking in detail at both the kinetics and composition of the reformed oxide film. Specific focus of this research was aimed at determining the effect of bovine serum albumin (BSA) on these features. The kinetics of repassivation were obtained by using a variety of electrochemical techniques. The current transients formed were fitted to a second-order decay curve, which accouts for two separate phases: coverage and growth. The reformation of the passive film was fastest in a phosphate buffered saline environment, with the presence of BSA delaying this process because it inhibits the oxygen-reduction reaction as it obstructs the active sites of the alloy when adsorbed onto the surface. The composition of the newly formed film was analyzed with x-ray photoelectron spectroscopy. As expected, the film was primarily composed of chromium (III) oxide with small contributions from cobalt and molybdenum oxides. In the presence of BSA, the quantity of molybdenum within the film was drastically reduced; it was shown to be extracted into the bulk solution via inductively coupled mass spectroscopy. This is observed because BSA is able to complex preferentially to the molybdenum ions when the alloy is exposed, extracting them into solution and altering the composition and integrity of the film.
Skip Nav Destination
Article navigation
1 June 2020
SCIENCE SECTION|
March 06 2020
Investigation of the Repassivation Process of CoCrMo in Simulated Biological Fluids
Blake Thornley;
Blake Thornley
‡
*Faculty of Mechanical Engineering, University of Leeds, Leeds, the United Kingdom, LS2 9JT.
‡Corresponding author. E-mail: [email protected].
Search for other works by this author on:
Robert Beadling;
Robert Beadling
*Faculty of Mechanical Engineering, University of Leeds, Leeds, the United Kingdom, LS2 9JT.
Search for other works by this author on:
Michael Bryant;
Michael Bryant
*Faculty of Mechanical Engineering, University of Leeds, Leeds, the United Kingdom, LS2 9JT.
Search for other works by this author on:
Anne Neville
Anne Neville
*Faculty of Mechanical Engineering, University of Leeds, Leeds, the United Kingdom, LS2 9JT.
Search for other works by this author on:
CORROSION (2020) 76 (6): 539–552.
Article history
Received:
October 28 2019
Revision Received:
March 06 2020
Accepted:
March 06 2020
Citation
Blake Thornley, Robert Beadling, Michael Bryant, Anne Neville; Investigation of the Repassivation Process of CoCrMo in Simulated Biological Fluids. CORROSION 1 June 2020; 76 (6): 539–552. doi: https://doi.org/10.5006/3423
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
Sign in via your Institution
Sign in via your InstitutionCiting articles via
The elimination of intergranular stress-corrosion cracking (IGSCC) in the corrosion of Cu-Mn alloys
Guojun Yan, Qi Xue, Xinmin Xu, Bailing Jiang
Oxide Scale Formation Behavior of Stainless Steels Exposed to the Oxidative High Concentration Alkaline Solutions
Yian Gao, Hongling Zhang, Peng Zhou, Qin Shang, Hongbin Xu
Exfoliation corrosion susceptibility of variously treated high-strength 7068 and 5059 alloys
Ankur Kumar, Arushi Garg, Gajanan P. Chaudhari
Algorithm for the Quantitative Characterization of Galvanic Corrosion Morphology from Optical Micrographs
Vangelina Osteguin, Luis Perdomo-Hurtado, Haya Abdelaziz, James Dante, Brendy C. Rincon Troconis
Stress Corrosion Cracking of 316L Stainless Steel in Concentrated Ammonium Chloride Solution with Very Low Dissolved Oxygen Levels
Jonas da Silva de Sa, Nicholas Laycock, Monir Aljaradli, Alexander Saul, Roger Newman, Guruprasad Sundararajan, Amine Haboub, Dana Abdeen, Hanan Farhat