Can you explain the difference between tinned copper wire vs steel or aluminum wire?

Customers sometimes confuse tinned copper wire with steel wire or aluminum wire because tinned copper has the silver or gray color in contrast to your typical copper color.

Customers sometimes confuse tinned copper wire with steel wire or aluminum wire because tinned copper has the silver or gray color in contrast to your typical copper color. Some customers feel that the performance of the wire is inferior if it is aluminum or steel so it is important for them to know that the wires are tinned copper. Tin is a useful plating for copper because it not only helps to boost copper's properties, it also helps the wire to last much longer than it would normally. In fact, a tin coated copper wire can last up to ten times longer than a similar bare copper wire. The use of tinned copper wire in connection with solar panels and other harsh environments like marine motors are well documented on the internet.