GPa contact pressure) and was stopped after 2,000 revs to inhibit the aggressive wear damage between the contact pairs as seen in Figure . The wear tracks from 1.3 to 25N load sliding tests was found to be bright, and copper in colour; the track from the 44N load test clearly showed penetrative wear down to the underlying steel substrate. In contrast, ML (Cu) coatings showed reduced lubricity at low loads; the average μ after sliding with 1.3, 5 and 10 N applied loads (≈ 0.43, 0.66 and 0.85 GPa, respectively) were 0.34, 0.43 and 0.50, respectively (Figure ). Post-test inspection of the wear tracks also showed poor levels of wear reduction (Figure ). The sliding tracks from, the 1.3 and 5N tests were dulled, with the 10N wear track presented penetration to the steel sub-surface.