Aluminum is a more chemically reactive metal than iron and thus should be less corrosion-resistant than steel. However, the actual answer to the above question on which metal is more corrosion resistant is: it depends on your formula chemistry.
Occasionally, a splint may be used to hold the break in place while it heals. If the break has caused the bone fragments to move by a large amount, then finger manipulation may be needed to realign the bone. A splint is then used to hold the bone in place while it heals. Some broken fingers need operations to give them the best chance of healing. This can be due to the break being unstable (ie after manipulation, the bone ends are being pulled out of place by adjacent muscles). What operations may be needed for broken fingers?
Your doctor will realign the dislocated bones. Your finger will be placed in a protective splint for several weeks. Your finger will most likely be swollen after the dislocation. You should apply ice packs to your finger for 20 to 30 minutes every 3 to 4 hours for 2 or 3 days or until the pain goes away. Your hand should be elevated on a pillow while you are lying down or on the back of a chair or couch while you are sitting. Your doctor may prescribe an anti-inflammatory medication.