galvanized

Hi, in my reservoir (a big rectangle rain barell) there are three thin galvanized stabilizators. They go from one side to the other of the rain barell and their purpose is to prevent the rain barell from breaking when it is filled, because of the water pressure on the side walls. See the small...

I was wondering, does galvanized metal change the pH of soil? Im thinking of putting up galvanized metal tomato fences around my ladies but Im scared that metal will mess up my pH. Please help! Thanks in advance 4 any help! =)