Corundum abrasive is hard, second only to diamond, so the cutting strength will be greater, but the toughness will be less. In addition, corundum abrasive is an artificial abrasive particle, which will cost more as an abrasive. So it will also limit its scope of application. Ordinary sand blasting treatment will choose quartz sand, river sand, copper slag, garnet, emery and so on. However, the first three have been banned as abrasives for sand blasting because they contain free silicon and harmful heavy metals, and there is a risk of silicosis and cancer. Garnet abrasive is basically used in the world now.