What coatings can use brown fused alumina as a filler?
Brown fused alumina, due to its high hardness, wear resistance, erosion resistance, and cost-effectiveness, is mostly used in industrial paint films requiring resistance to friction, scratches, sandblasting abrasion, and media erosion; it is rarely used in ordinary residential wall paints. It can be categorized according to application scenarios as follows:
I. Industrial Wear-Resistant Floor Coatings
1. Epoxy Wear-Resistant Floor Coating: Epoxy topcoat, epoxy self-leveling compound, epoxy mortar layer, with a large amount of added brown fused alumina coarse/fine powder. Frequent forklift driving and handcart dragging in workshops, the brown fused alumina significantly improves wear resistance, preventing the floor from easily becoming sandy or scratched. Standard for high-load-bearing factories, logistics warehouses, and heavy-duty workshops.
2. Polyurethane Wear-Resistant Flooring, Polyurea Flooring: Polyurea anti-corrosion and wear-resistant topcoat, polyurethane flooring topcoat, combined with brown fused alumina, resistant to wheel friction and chemical erosion, commonly used in parking lots and heavy-duty workshops.
3. Emery Wear-Resistant Flooring (Cureable Flooring): Dry-spread brown fused alumina aggregate, combined with cement to form an integral wear-resistant layer, essentially a coating/hardened surface layer system.
II. Heavy-Duty Anti-Corrosion and Wear-Resistant Industrial Topcoats (Steel Structures, Equipment Corrosion Protection)
1. Epoxy Heavy-Duty Anti-Corrosion and Wear-Resistant Paint: For the inner walls of steel structures, equipment, pipelines, and storage tanks. Storage tanks containing sand, slurry, or sewage experience high-speed erosion of the paint film by the medium. Brown corundum enhances erosion resistance and wear resistance, preventing the paint film from being worn away by water flow and solid particles. Suitable for: sewage treatment equipment, tailings pipelines, mud storage tanks, and power plant ash pipelines.
2. Epoxy Coal Tar Wear-Resistant and Anti-Corrosion Paint: For the outer walls of buried pipelines and municipal sewage pipelines, providing both corrosion protection and protection against soil and sand friction and wear.
3. Modified Polyurethane Anti-Corrosion Topcoat: For the outer shell of mining equipment and washing equipment, providing resistance to ore impact and friction.
III. Wear-resistant Coatings for Mechanical Equipment
1. Wear-resistant Topcoat for Construction Machinery: Topcoat for excavators, loaders, crushers, mixers, and conveyors. During operation, continuous impact and friction from sand and gravel prevents the paint from scratching and exposing the substrate.
2. Protective Coating for Mining Equipment, Ore Washing Machines, and Vibrating Screens: The continuous erosion and wear of the paint film by ore necessitates high-hardness fillers. Brown fused alumina offers significantly better cost-effectiveness than silicon carbide.
3. Wear-resistant Protective Coating for Fans, Impellers, and Pipeline Inner Walls: Wear-resistant protective coating for induced draft fans, dust collection ducts, and pulverized coal conveying pipelines. High-speed friction from dust on the pipe walls is addressed by adding brown fused alumina as a wear-resistant layer, extending the pipeline’s service life.
IV. Wear-resistant and Anti-corrosion Coatings for Ships and Ports
1. Wear-resistant and anti-corrosion paint for ship ballast tanks and cargo holds: For cargo holds used during loading and unloading of coal, ore, and sand, where friction and impact on the tank walls are common; epoxy cargo hold paint combined with brown fused alumina provides resistance to impact and wear.
2. Topcoat for steel structures, gantry cranes, and loading/unloading equipment at ports and wharves: Due to the abundance of sand and gravel at sea and frequent friction during loading and unloading, this coating combines salt spray resistance with wear resistance.
3. Wear-resistant coating for the inner walls of dredged pipelines and silt vessels: For strong erosion from mud and sand, brown fused alumina is the mainstream wear-resistant filler.
V. Wear-resistant pipe, pump, and valve inner wall protective coatings
1. Epoxy ceramic wear-resistant coating, solvent-free epoxy wear-resistant lining: For coating the inner walls of steel pipes and PE pipes used to transport mortar, fly ash, slurry, and silt.
2. Wear-resistant and anti-corrosion paint film for the inner cavities of water pumps, slurry pumps, and valves, resisting abrasion by solid particles in the medium.
VI. Wear-resistant Protective Topcoat for Hardware, Molds, and Sheet Metal
1. Wear-resistant protective coating for metal stamping dies and tooling fixtures: Short-term protection against impacts and scratches, improving the wear resistance of the mold surface.
2. Rust-proof and wear-resistant topcoat for large castings and machine tools: Lathe, milling machine, and heavy-duty machine tool housings; less prone to paint chipping due to everyday tool friction.
VII. Floor Marking and Anti-slip Coating
1. Epoxy Anti-slip Marking Paint, Ramp Anti-slip Paint: The paint film contains fine brown corundum particles to increase friction and prevent slipping, while also being wear-resistant. Commonly used for marking ramps and forklift access roads in factory areas.
2. Staircase Anti-slip Polyurethane Paint, Slope Anti-slip Floor Paint
Ⅷ. Rubber-modified coatings and elastic wear-resistant coatings
Nitrile-modified epoxy and elastic polyurethane coatings are used for conveyor belt side protection and rubber roller surface protection coatings; brown fused alumina enhances resistance to abrasion and particulate wear.