The invention provides anti-
rust and
stain-free
hydraulic fluid. The anti-
rust and
stain-free
hydraulic fluid is characterized by being prepared from synthesized
sodium sulfonate,
base oil, boric acidester, chlorinated paraffin,
polyester,
nonylphenol polyoxyethylene ether,
ricinoleic acid triethanolamine phosphate, polyether, a surfactant, water, a
thickening agent, an anti-
rust additive, an anti-wear additive and a scale inhibition
corrosion inhibitor. The
lubricant ash-free extra pressure anti-wear additive is adopted, and the extra anti-rust additive is added, so that the anti-rust protection capacity of the
hydraulic fluid in a
closed system is effectively enhanced, and the anti-rust,
stain-free and anti-wear requirements in a tiny gap are greatly met; in addition, the
thickening agent with the high mechanical shearing resistant capacity is adopted, thus, the stability of mechanical shearing is effectively improved, the strength and thickness of an
oil film are effectively increased, and the lubricating performance and extreme pressure performance of the hydraulic fluid are greatly improved; besides, the anti-rust and stain-free hydraulic fluid has high lubricating, cooling,cleaning and rust prevention performance, and has anti-
corrosion and anti-wear properties, therefore a hydraulic
system can transmit working signals reliably, and the service life of the hydraulic fluid can be greatly prolonged.