Cost Effective Industrial Black Silicon Carbide for Metal Surface Treatment Engineering Project. Efficient Surface Cleaning: Mohs hardness 9.1-9.2 with sharp particles removes rust, paint, and slag rapidly. Iron-Free Contamination: Chemically inert material prevents iron contamination on stainless steel and aluminum. Cost-Effective Solution: Significantly lower cost than white or brown corundum with excellent treatment results. Customized Particle Sizes: Full series supply from F16 to F220 following FEPA international standards. Superior Adhesion Profile: Creates uniform anchor patterns to improve coating adhesion and extend product life. Self-Sharpening Ability: Generates new sharp edges under impact for long service life and low consumption. Flexible Customization: Standard is customized with flexible customization options available for clients.