The invention relates to the technical field of coatings, in particular to an inorganic water-based
phosphate metal anti-
corrosion nano
coating and a preparation method thereof. The
coating comprises the following components in parts by weight: 10-15 parts of
cerium dioxide nanoparticles, 20-25 parts of modified waterborne
polyurethane resin, 10-15 parts of
phosphate, 1-4 parts of a flash
rust inhibitor, 15-20 parts of filler, 1-4 parts of a dispersing agent, 2-4 parts of a defoaming agent, 1-4 parts of a flatting agent, 1-3 parts of a coalescing agent, 1-3 parts of a
thickening agent and 25-45 parts of deionized water. The preparation method of the
coating comprises the following steps: S1, weighing the raw materials according to the components and the parts; s2, sequentially putting the modified waterborne
polyurethane resin, the deionized water, the
phosphate and the anti-flash-
rust agent into a stirring pot, stirring at a
low speed for 10 seconds, adding water into the stirring pot, stirring at a
low speed for 1-2 minutes, stirring at a high speed for 2 minutes, and standing for 20-30 minutes; s3, adding the defoaming agent, the dispersing agent, the filler and the flatting agent into the stirring pot, adding the
cerium dioxide nanoparticles into the stirring pot in a low-speed stirring state, adding the coalescing agent and the
thickening agent, and stirring at a high speed for 30 minutes.