Which statement is true regarding non-ferrous metals?

Non-ferrous metals are indeed known for their higher resistance to corrosion compared to ferrous metals, which contain iron. This characteristic comes from the composition of non-ferrous metals, which often includes elements such as aluminum, copper, lead, nickel, and zinc. These metals do not form rust, a common problem with ferrous metals when exposed to moisture and oxygen. As a result, non-ferrous metals are widely used in applications where corrosion resistance is critical, such as in marine environments, electronics, and construction.

The other statements contrast with established properties of non-ferrous metals. Non-ferrous metals are typically non-magnetic, which is why the first statement is not correct. They also tend to be more malleable than ferrous metals, allowing them to be easily formed and shaped; hence, the third statement is inaccurate as well. While some non-ferrous metals can be welded, the ease of welding varies significantly depending on the specific metal and the welding process, making the fourth statement too broad a generalization to be accurate.