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?
A board used as a splint should be at least as wide as the injured part. Tightly rolled newspapers or magazines can be used to splint the arm or lower leg. Ice cream sticks have been used as splints for broken fingers. Splints should be padded, at least on one side. a provisional splint consisting of cast continuous clasps that follow the facial and lingual surfaces of the teeth at the height of contour. It is cemented onto the teeth to be splinted and simultaneously wired closed to bring the clasps into intimate contact with the teeth.