Description

This visually striking lab clearly illustrates the processes
of rusting, corrosion and cathode inhibition. Iron metal
will rust in the presence of air and water, a process
that accelerates in ocean water. Yet, in the presence of
another metal (such as magnesium) the nails will not
rust for a very long time as the magnesium sacrifices
itself by supplying electrons to the iron nail. Eventually
the magnesium will vanish, and a white solid will form
on the bottom of the petri dish. Developed by Ray
Steigvilas. Includes materials for five student groups
and instructions. Grades 7–12.