Acid rain Investigation

In my garden I have a metal statue made of an alloy. Which consists of mainly magnesium. I have noticed that during the year it corrodes at different rates. I will now devise an experiment to investigate the causes of this problem.
The reactions of magnesium with certain elements are detailed below
(A) Magnesium with Water
Magnesium does not react readily with cold water but in steam the magnesium lights and leaves behind magnesium oxide and releases hydrogen gas.
(B) Magnesium with Air
Magnesium reacts slowly with air forming an oxide layer on the surface.
(C) Magnesium with Acid
Magnesiu…