Aluminum piping and tubing is silvery-white, soft, and ductile. The metal belongs to the boron group. Aluminum is the third most abundant element present on earth. Aluminum has low density. When exposed to corroding environments, aluminum forms a passivating coating on its surface, which helps it avoid further corrosion on its internal structure. Aluminum is mostly made into an alloy by elements like copper, manganese, zinc, magnesium, and silicon.