Fig. 9: The worn surface morphologies of rolled samples.

a Dry friction, e in simulated seawater; b, f the enlarged part in a, e; c, g the 3D morphology of the grinding surface, d the distribution of elements in b.

a Dry friction, e in simulated seawater; b, f the enlarged part in a, e; c, g the 3D morphology of the grinding surface, d the distribution of elements in b.