Question

An old iron beam was coated with an unknown metal. there is a crack on the coating and it is observed that the iron is rusting at the fracture. the beam is in a structure that experiences high stress, resulting in frequent fractures to the coating. what was the old metal coating likely made of and what metal you would use to repair the fractures to avoid further corrosion?

Answer 1

Based on the given description above about the metal that is being used for fractures, the old metal coating that was used before was made of TIN, and now, the metal that is used to repair fractures in order to avoid further corrosion is ALUMINUM. Hope this answer helps.