Abrasion-resistant anti-corrosive coating, and preparation method and use thereof
Disclosed are an abrasion-resistant anti-corrosive coating, and a preparation method and a use thereof. The abrasion-resistant anti-corrosive coating is prepared from a component A and a component B. In the component A, a polyurethane (PU) resin is used as a film-forming material in combination with a corrosion inhibitor, an abrasion-resistant filler, and a body filler. On the basis of the abrasion resistance of the PU resin, the corrosion inhibition of the corrosion inhibitor and the high abrasion resistance of the abrasion-resistant filler improve the abrasion resistance of a coating layer. The use of the body filler reduces a cost of the coating. A thixotropic agent makes the coating have high storage stability. The coating does not include metal components, which avoids an electrochemical potential difference between a coating layer and an alloy, such that the corrosion of the alloy can be effectively controlled.
1 . An abrasion-resistant anti-corrosive coating made from a component A and a component B,
wherein in parts by weight, the component A comprises:
polyurethane resin: 10 to 60 parts;
abrasion-resistant filler: 1 to 60 parts;
thixotropic agent: 0.5 to 1 part;
body filler: 5 to 15 parts;
corrosion inhibitor: 0.5 to 2 parts; and
solvent: 20 to 80 parts;
the component B comprises a curing agent;
a mass ratio of the component A to the component B is 1:(1-2);
wherein the abrasion-resistant filler is silicon nitride and/or boron nitride;
the thixotropic agent is lipophilic fumed silica;
the body filler is mica and/or ground calcium carbonate;
the corrosion inhibitor is N-nitrosophenylhydroxylamine;
the solvent is selected from the group consisting of X-10, xylene, and ethylene glycol monoethyl ether acetate; and
the curing agent is a modified alkyd resin.
2 . The abrasion-resistant anti-corrosive coating according to claim 1 , wherein the silicon nitride and the boron nitride each have a particle size of 1 μm to 20 μm;
the lipophilic fumed silica has a particle size of 20 nm to 100 nm; and
the mica or the ground calcium carbonate has a particle size of 2 μm to 30 μm.