Corrosion of different metals
Our hypothesis has been proven to be true. Between aluminum, copper, iron and zinc, aluminum is the most corrosion resistant metal. Most metals already have some form of natural or factory-applied coating on their surfaces to prevent or delay corrosion from taking place. However, when the metal sheets are cut into smaller pieces, the surface will become exposed on the sides that are cut. This is where most of the corrosion begins.
Corrosion will cause metal surfaces to get wear out and finally disintegrate. Most metals will form a natural protective coating to prevent or delay the onset of corrosion. However, metals can also be protected from corrosion by painting the surfaces or plating them. Chroming is one of the common industrial plating practices used to protect metal surfaces.
What would happen if the science project experiment is done using other metals like tin, lead, magnesium or nickel?
Try testing using different acidic and alkaline solutions to induce corrosion in the metal samples.
Corrosion - http://en.wikipedia.org/wiki/Corrosion
Corrosion of metals - http://corrosion-doctors.org/MatSelect/corrmetals.htm
Why metals corrode? - http://corrosion.ksc.nasa.gov/corr_metal.htm
Basic safety requirements