The invention discloses a
chromium-free self-lubricating
passivation solution and a preparation method thereof. The
chromium-free self-lubricating
passivation solution is formed by compounding the following compositions in percentage by weight: 8%-12% of water-borne
epoxy resin, 0.5%-1% of curing agent, 10%-15% of
silane coupling agent, 0.5%-1% of inorganic component, 2%-4% of
solid lubricant, 1%-2% of
friction modifier, 0.5%-1% of anti-wear agent, 0.5%-1% of anti-sinking agent, and 60%-75% of diluting agent. The inorganic component is one or a combination of Ce(NO3)3 and
sodium molybdate, the
solid lubricant is one or a combination of two or more of
polytetrafluoroethylene,
polyethylene wax,
polyethylene,
molybdenum disulfide and
graphite, the
friction modifier is self-synthesized
molybdenum dialkyldithiophosphate, the anti-wear agent is one or a combination of nanosilicon dioxide and nano aluminum
oxide, the anti-sinking agent is attapulgite, and the diluting agent is a mixture of water and
ethanol. A plate product coated with
passivation solution has the advantages of being
pollution-free, low-friction, anti-oxidized, anti-wear and extreme pressure-resistant,
corrosion-resistant, finger-resistant, having good mechanical performance and the like, and the passivation solution can be directly coated on the surfaces of a
zinc-plated plate and parts of certain
mechanical equipment for use.