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Media blasting, also known as abrasive blasting, is a surface treatment process that propels abrasive particles—such as glass beads, aluminum oxide, steel grit, or plastic media—at high velocity onto a substrate to clean, texture, or prepare the surface. This mechanical impact removes surface contaminants, oxidation, scale, old coatings, and machining marks, resulting in a uniform, matte, or textured finish. The process modifies surface roughness, typically achieving values between 1.5 to 6.0 µm Ra, depending on the media type, size, pressure, and exposure time. Media blasting can increase surface area and mechanical adhesion, making it ideal for pretreatment before painting, coating, or bonding. It is suitable formetals , composites, andplastics , and commonly used inautomotive ,aerospace , and manufacturingindustries . Unlikepolishing , it produces a non-reflective, anti-glare surface and can enhance fatigue strength by inducing compressive surface stresses. Media blasting is also used for creating specific textures or cosmetic finishes without significantly affecting part geometry. Overall, it is a versatile and efficient method for achieving surface uniformity, cleanliness, and functional texture.
Aluminum, Steel ,Stainless Steel,Brass,Bronze,Copper.
Ra 1.6–6.3 µm (varies with media and pressure).
Matte, satin, or frosted finish depending on media type.
Common in automotive, aerospace, and consumer products.
Material removal ~0.01–0.05 mm; minimal thickness impact.
Sand (silica sand, garnet, olivine, aluminum oxide), Glass beads, Aluminum oxide, Walnut shells, Steel grit and steel shot, Corn cob grit, Ceramic beads.
6061 T6, 6082, 7075-T6, 5083-H111, 6063, 5052, 2024-T351, 7050, 2017A, 6082-T651, 7075-T651, 2014, 6061-T651, 7075-T7351, 6082-T6, 2014-T6, 6063-T5, 6063-T6, 5083-H32, 5052-H32
A2 Tool steel, D2 Tool steel, A3 Tool Steel, O1 Tool Steel, S7 Tool Steel, H13 Tool Steel
932 Bearing Bronze , 954 Bearing Bronze, 544 Bearing Bronze
Potential limitations include the risk of surface damage if not properly controlled, the need for appropriate ventilation due to airborne particles, and the requirement for post-blasting cleaning to remove residual abrasives.
Benefits include efficient removal of contaminants like rust, paint, and scale; preparation of surfaces for coatings or bonding; creation of specific surface textures; and improvement of part cleanliness and appearance.
Applications include cleaning and preparing metal parts in automotive and aerospace industries, creating decorative finishes on consumer products, preparing surfaces for painting or coating, and restoring historical artifacts.