Hello,

1. Iron is more reactive than copper and is placed above copper in reactivity series. So Iron replaces copper from the solutions.
2. Bronze in an alloy of copper and tin, which contains mainly copper and 12 to 12.5% tin. Nowadays, tin free bronze is also prepared by using Aluminium, Magnesium, or zinc instead of tin. In additions to Aluminium, Magnesium and zince, metalloids such as silicon, arsenic, phosphorus are also used.