Hi, So I was thinking about corrosion and I came across this structure: Do you think the inner metal/alloy that is corroding is steel? Also, what do you think the outer layer (in white) is? perhaps the metal is just coated with paint to avoid corrosion? Finally, what type of corrosion do you think its undergoing? General Corrosion, Galvanic corrosion, uniform corrosion and so on.