Exact usage of white corundum in coating
White corundum possesses high mohs hardness 9.0,Acid and alkali resistance,high temperature resistance(metling 2050℃）and Low oil absorption,is a functional filler specifically designed for high-end wear-resistant, corrosion-resistant, anti-slip, matte, and high-temperature resistant coatings and Compatible with all coating systems including epoxy, polyurethane, waterborne, fluorocarbon, powder, UV and inorganic ceramic coatings.
I. Advantages of White Corundum
1. Hard and wear-resistant skeleton: Sharp-angled polyhedral particles are evenly dispersed in the resin to form a rigid support layer, which greatly improves the paint film’s resistance to scratches, crushing, and erosion.
2. Dense barrier corrosion protection: It fills the micropores of the paint film, blocking the penetration of water, acid, alkali and salt spray. It is chemically inert and does not react with corrosive media, thus enhancing heavy-duty corrosion protection performance.
3. Mechanical anchoring enhances adhesion: The edges and corners interlock with the resin, increasing the adhesion between the coating and the metal/concrete substrate by more than 30%, reducing peeling, flaking, and cracking.
4. White can be adjusted to different colors: high whiteness does not affect color matching, fine powder is used for high-gloss wear-resistant topcoat, medium and coarse powder is used for matte/anti-slip texture, which can replace some matte powder, wear-resistant and does not lose its matte finish.
II. Applications and Suitable Particle Sizes of White Corundum in the Coating Industry
1. Industrial wear-resistant floor coatings
Includes epoxy wear-resistant flooring, polyurethane heavy-duty flooring, mortar flooring, anti-slip overlay for parking ramps, and emery floor coating.
Recommended sizes:#120 #150 #180 #220 #240 #280 #320
2. Wear-resistant and anti-corrosion coatings for heavy metal industries
Mining equipment, fan blades, pumps, valves, pipelines, chemical storage tanks, ship decks, construction machinery topcoats, heavy-duty anti-corrosion thick-film paints.
Sizes:#280 #320 #360 #400 #500 #600
4. Wear-resistant paint for wood/flooring
Solid wood floor varnish, outdoor wood protective coating, and furniture PU topcoat.
Sizes:#800 #1000 #1200
5. Exterior wall coatings
Stone-like paint, sand-textured paint, anti-fouling and weather-resistant exterior wall paint, and fluorocarbon paint for bridges.
Sizes:#320 #360 #400 #500 #600
6. High-temperature resistant inorganic ceramic coatings/insulating coatings
Water-based inorganic ceramic paint, high-temperature refractory coating, UV insulating varnish for electronic power batteries, and protection for high-temperature equipment.
Sizes:#1200 #1500 #2000 #2500 #3000
7. Powder Coating
Metal powder wear-resistant topcoat, outdoor aluminum profile fluorocarbon powder.
Sizes:#600 #700 #800 #1000 #1200 #1500 #2000
8. UV coatings
UV coating for electronic casings, UV-resistant coating for plastics, UV-insulating coating for power batteries.
Sizes:#1000 #1200 #1500
9. Water-based environmentally friendly coatings
Water-based epoxy flooring, water-based industrial anti-corrosion paint, and water-based interior wall wear-resistant paint.
III. Development and Application Trends of White Corundum in the Coatings Industry
1. New energy sector: Demand for UV ceramic coatings for power battery insulation and wear-resistant and anti-corrosion paints for wind turbine blades is growing rapidly
2. Environmentally friendly water-based coatings replace oil-based coatings; neutral, high-purity white corundum is compatible with all water-based systems.
3. High-end matte topcoats are gradually replacing silica matting powder, achieving a combination of “matte finish + wear resistance”
4. The use of special coatings for heavy-duty transportation, marine corrosion protection, and high-temperature resistance continues to expand.
