Which abrasive is not suitable for removing corrosion from aluminum alloys?

Silicon carbide is not suitable for removing corrosion from aluminum alloys primarily because it is significantly harder than aluminum. While it can effectively cut through certain materials, its abrasiveness can lead to excessive material removal and potential damage to the surface of the aluminum. This can result in a rough finish, which can expose the underlying material to further corrosion and compromise the structural integrity of the alloy.

In contrast, aluminum oxide, garnet, and steel wool are abrasives that can be used carefully on aluminum alloys. Aluminum oxide is commonly used for its appropriate hardness and ability to create a smooth finish without excessive material loss. Garnet, similarly, can be used effectively for sanding and finishing without damaging the aluminum surface. Steel wool, while it can leave behind particles that might encourage corrosion, can still be used with caution in certain applications, as it tends to be less abrasive compared to silicon carbide.