Research Article
The Application of Response Surface Methodology in the Investigation of the Tribological Behavior of Palm Cooking Oil Blended in Engine Oil
Figure 10
SEM images of the surface of aluminum plate for different volume concentrations of biolubricant; (a) 10% waste oil; (b) SAE 40; and (c) 5% waste oil.
(a) |
(b) |
(c) |