Lab 11.1: Corrosion of metals

1.
a) The penny wrapped in steel wool was less corroded then the unwrapped penny.
b) This is sacrificing metal technique because you did not coat the penny with a metal so only the outside only corrodes you merely wrapped it leaving some parts of the penny showing and corroding. The iron was "sacrificed" so most of the penny was protected(steel wool was corroded in place for the copper in the penny).
c) This works because iron is more active on table j than copper so the copper won't react with the rain. The active iron bands react with the rain and become erroded but leaves the copper unharmed. Hence them being checked and replaced regularly.
2.The corrosion is occuring because the aluminum is more active than the iron that was surrounding it; yhe Al ion and the iron are reacting because the metal is higher on table j.

3. The caulk would've created a barrier between the Al and Fe. So there would have been a coating and less corrosion would have had taken place.

4.
a) Corrosion is when a metal and an ion reacting cause the metal to errode.
b) Chemists have created different ways to outsmart it by putting the iron is the copper made statue of liberty or using caulk between the metals and ions. This coats the metal they want to protect with another metal so that metal will corrode instead of the one you need.
Enrichment:
Al+O2---> Al+3 and Fe +Al+3 ---->Al +Fe +3.
Aluminum is represented by A and iron would represented B.