High-temperature-curing inorganic anticorrosive coating for automobile brake disc

Abstract

The invention relates to the technical field of anticorrosive paint, in particular to high-temperature-curing inorganic anticorrosive coating for an automobile brake disc and a preparation method thereof. The inorganic anticorrosive coating comprises the following components in parts by mass: 40-45 parts of inorganic resin, 3-5 parts of modified zinc phosphate, 5-6 parts of composite ferrotitaniumpowder, 3-4 parts of a curing agent, 10-15 parts of water, 20-25 parts of talcum powder, 0.8-2 parts of dispersing agents, 0.5-0.8 part of a defoaming agent, 0.5-1 part of a neutralizing agent and 0.5-1 part of bentonite. According to the inorganic anticorrosive coating, on the premise that coating thickness is 30 microns, salt spray resistance time can reach 1000 hours, and adhesive force is good; different types of dispersing agents are selected, so the influence on the salt spray resistance of a paint film is very outstanding; a hydrophobic ammonium salt forms a good water-resistant film,and a sodium salt hydrophilic dispersing agent is low in relative molecular mass, so the water resistance and salt fog resistance of a coating film are reduced; and the polycarboxylate ammonium salt with a special structure and high relative molecular mass is selected as the dispersing agent, so the corrosion resistance of the coating is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a high-temperature-cured inorganic anti-corrosion coating for automobile brake discs and a preparation method thereof. Background technique [0002] Currently on the market are mainly organic high-temperature curing anti-corrosion coatings. When used on brake discs, the paint film is difficult to dry under high temperature conditions. When the temperature reaches the standard baking condition, the paint film becomes soft. This problem is mainly due to organic resins. Due to the structure of the workpiece, the hardness of the paint film is lower than H after the workpiece is cooled, and the surface compactness is poor. Generally, the hardness reaches H after 3 days, but it affects the work efficiency. At the same time, the water resistance, salt spray resistance, and oil resistance of the paint film are poor. The impact test paint film is easy to fall off. Conten...

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Problems solved by technology

[0002] Currently on the market are mainly organic high-temperature curing anti-corrosion coatings. When used on brake discs, the paint film is difficult to dry under high temperature conditions. When the temperature reaches the standard baking condition, the paint film becomes soft. This problem is mainly due to organic resins. Due to the structure of the workpiece, the hardness of the paint film is lower than H after the workpiece is cooled, and the surface compactness is poor. Generally, the hardness reaches H after 3 days, but it affects the work efficiency. At the same time, the water resistance, salt spray resistance, and oil resistance of the paint film are poor. Impact test paint film is easy to fall off

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