Wear and Corrosion of Cast Al Alloy Piston with and without Brake Oil

Table 2

Chemical properties of hydraulic fluid (brake oil).

Ingredient name	% wt. or % vol.
Triethylene glycols	5–20
Tetraethylene glycol monobutyl ether	5–20
Polyethylene glycol	5–20
Diethylene glycols	5–20
Polyalkylene glycols	5–20
Trade Secret Inhibitor Package	<3
pH	10.0–11.5
Water solubility	Soluble

Source: manufacturer [23].