brown aluminium oxide 1) High Al2O3 Content: 95%min 2) Professional ... over 2200°c, and made into different grain size through crystal, choosing, crashing, magnetic, separating, screening, washing and acid ... material workpieces to decontaminate, derusting, prevent corrosion, remove oxide skin etc..4) Abrasion resistance ground: Mainly used for ... and aluminium casting in coating. brown aluminium oxide