Research Article

[Retracted] Influence of Sulfur and Additives on Wear of Exhaust Valve Seat of Cylinder Head

Table 5

Test results of physical and chemical properties of liquid substances.

Order numberTest itemsResult

1Viscosity (mm2/s, 25°C)2.00
2pour point (°C)−48
3Freezing point (°C)−50
4Density (g/cm3)0.7989