Research Article
Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties
Table 3
Physicochemical properties of test oils.
| | Test oil | Viscosity at 40°C
(cSt) | Viscosity at 100°C
(cSt) | Viscosity index | Flash Point
°C | Pour Point
°C | Total Acid Number
(mg KOH/g) | Copper strip Corrosion test |
| | Base oil (EP140 gear oil) | 408.4 | 27.9 | 94 | 194 | -3 | 0.25 | 2a |
| | Base oil +0.5% pristine MWCNTs | 409.1 | 27.75 | 93 | 192 | -3 | 0.26 | 2a |
| | Base oil + 0.5% 10 hour ball milled MWCNTs | 410.2 | 28.6 | 95 | 194 | -3 | 0.25 | 2a |
| | Base oil + 0.5% 20 hour ball milled MWCNTs | 411.5 | 28.4 | 95 | 194 | -3 | 0.26 | 2a |
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