The invention discloses high-temperature-resistant environment-friendly
metal casting coating and a preparation method thereof. The
coating comprises, by weight, 3-5 parts of attapulgite clay, 12-15 parts of
quartz powder, 5-12 parts of talcum
powder, 4-10 parts of superfine glass
powder, 1.5-4 parts of
sodium silicate, 3-5 parts of
bauxite, 3-8 parts of diatomaceous earth, 2-4 parts of
bentonite, 6-10 parts of
polyethylene glycol, 3-9 parts of organic
siloxane, 5-9 parts of
silicon resin, 6-12 parts of
linseed oil water-soluble
alkyd resin, 4-6 parts of triphenyltin
hydroxide, 2-6 parts of lignosulfonic acid, 1-3 parts of oxidizing agents, 1-2 parts of
wetting agents, 2-5 parts of
defoaming agents, 4-9 parts of preservatives, 2-6 parts of bonding agents, 5-8 parts of curing agents and 75-90 parts of deionized water. Compared with the prior art, the
casting coating prepared through the method has excellent high
temperature resistance,
crack resistance and scouring resistance, and is good in adhesiveness and air permeability; meanwhile, the produced coating is uniform,
environmentally friendly, free of
pollution, good in stability and adsorbability, and capable of meeting the requirements for
mass production of large castings, and improves the surface quality of the castings.