What Are The Hazards of Oil Contamination To The Hydraulic Station System? Various contaminants in the oil cause various forms of damage to the components. Solid particles enter the clearance of the moving parts, resulting in surface cutting damage or fatigue wear of the parts. Erosion wear is caused by the impact of solid particles in the high-speed liquid flow on the surface of the components. The moisture in the oil and the oxidation and deterioration products of the oil have corrosive effects on the components. In addition, air in the oil of the system can cause cavitation, which leads to erosion and damage to the surface of the components.