Chemical Engineering - Chemical Engineering Basics - Discussion

Aluminium oxide is the right answer.

The aluminum oxide will cut through steel, as well as softer metals like brass, annealed iron, and steel alloys.

Silicon carbide wheels are harder and more brittle than aluminum oxide wheels.

It's tougher than Silicon carbide, which is chemically inert to the material like steel, alloy, iron etc.

Aluminum is a generally soft, nonferrous, ductile material with low density and naturally high resistance to corrosion.

Aluminium oxide is formed in the form of harsh white crystals, which do not dissolve neither in the acids nor the bases, and show no desire for moisture (hydration).

Aluminium oxide is used for general purposes while Silicon carbide is harder and brittle so it is used for stones, cement and chilled iron.

Ans : D (Al2O3).

Aluminum oxide or fused corundum (Al2O3) is a crystalline aluminum oxide obtained from bauxite clay containing about 60% of aluminum. It is referred to as the fused corundum due to the technology of its production in electric arc furnaces.

The purity percentage of aluminum oxide (94"99%) and degree of its hardness makes it one of the varieties of grain used for manufacture of grinding or cutoff wheels or other abrasive tools for processing of wood or metals.

Aluminum oxide (Al203) is the most common abrasive used in grinding wheels. It is usually the abrasive chosen for grinding carbon steel, alloy steel, high-speed steel, annealed malleable iron, wrought iron, and bronzes and similar metals while Silicon carbide is also can be used but due to availability & Cost with Respect to Performance.

Silicon carbide is mostly used material for making cutting tool, but aluminium oxide is cheaper than silicon and it has lower capacity.