The Synergistic Antiwear Performances of Organic Titanium Compounds Containing Sulfur with Borate Ester Additive

Figure 4

SEM photographs of worn scar lubricated with additive containing oil under different loads: (a) BNO with TiS at 392 N; (b) BNO with TiS at 490 N; (c) BNO at 490 N; (d) TiS at 490 N.

(a)

(b)

(c)

(d)