SYMPOSIA PAPER Published: 01 January 2001

A Study of the Mechanism for Beneficial Effects of Yttrium Additive in Lubricant on Corrosive Wear and Friction of Metals


Previous work has demonstrated that the wear losses of stainless steel 304 and Al alloy 6061 under sliding in lubricant (oil and grease) mixed with dilute H2SO4 solution can be greatly reduced when a small amount of oxygen-active element (yttrium or cerium) powder is added to the lubricant. In order to explore the mechanism responsible for the beneficial effect of yttrium on corrosive wear resistance, corrosive-wear tests were carried out at different sliding speeds in lubricants with and without yttrium added respectively. Effects of yttrium on friction behavior of the materials were also studied. Worn surfaces were examined using SEM for better understanding of the role that yttrium played in corrosive wear. Possible mechanisms responsible for the beneficial effect of the oxygen-active element on corrosive wear are discussed.

Author Information

Liu, R
University of Alberta, Edmonton, Alberta, Canada
Li, DY
University of Alberta, Edmonton, Alberta, Canada
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Developed by Committee: D02
Pages: 549–562
DOI: 10.1520/STP38301S
ISBN-EB: 978-0-8031-5567-1
ISBN-13: 978-0-8031-2883-5