Effect of Applied Cathodic Potential on Friction and Wear Behavior of CoCrMo Alloy in NaCl Solution

Simple item page
dc.cclicenceCC-BYen
dc.contributor.authorSun, Yong
dc.contributor.authorBailey, Richard
dc.date.acceptance2020-11-19
dc.date.accessioned2020-12-14T13:40:17Z
dc.date.available2020-12-14T13:40:17Z
dc.date.issued2020-11-23
dc.descriptionopen access articleen
dc.description.abstractMost of the reported work on the effect of applied potential on tribocorrosion or corrosive wear of metallic alloys in a corrosive environment were conducted at anodic potentials. Limited tests have been conducted at cathodic potentials for comparison purposes or to derive the pure mechanical wear component in tribocorrosion. This work investigated the effect of cathodic potential on the friction and wear behaviour of an important biomedical alloy, CoCrMo, sliding against an Al2O3 slider in 0.9% NaCl solution at 37 C. High friction was found at cathodic potentials close to the open circuit potential, where mechanical wear played a predominant role in material removal. At potentials more cathodic than the hydrogen charging potential, low friction and low wear were observed. The coefficient of friction (COF) and total material loss decreased with increasing cathodic potential, such that at -1000 mV (saturated calomel electrode, SCE), extremely low COF values, as low as 0.02, and negligible material loss were obtained. Such reductions in friction and wear at increasing cathodic potentials were accompanied with the formation of parallel lines in the sliding track and were gradually diminished with increasing applied contact load. It is believed that hydrogen charging and hydrogen segregated layer formation at the surface are responsible for such a phenomenon. It can also be concluded that it is difficult to derive the pure mechanical wear component in tribocorrosion by simply conducting a test at an arbitrary cathodic potential.en
dc.funderNo external funderen
dc.identifier.citationSun, Y. and Bailey, R. (2020) Effect of Applied Cathodic Potential on Friction and Wear Behavior of CoCrMo Alloy in NaCl Solution, Lubricants, 8, 101en
dc.identifier.doihttps://doi.org/10.3390/lubricants8110101
dc.identifier.issn2075-4442
dc.identifier.urihttps://dora.dmu.ac.uk/handle/2086/20525
dc.language.isoen_USen
dc.peerreviewedYesen
dc.publisherMDPIen
dc.researchinstituteInstitute of Engineering Sciences (IES)en
dc.subjectfrictionen
dc.subjectwearen
dc.subjecttribocorrosionen
dc.subjectCoCrMo alloyen
dc.subjectpotentialen
dc.titleEffect of Applied Cathodic Potential on Friction and Wear Behavior of CoCrMo Alloy in NaCl Solutionen
dc.typeArticleen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
lubricants-08-00101 (1)(2020).pdf
Size:
3.73 MB
Format:
Adobe Portable Document Format
Description:
Published paper
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.2 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

School of Engineering and Sustainable Development