The copper alloys are generally red or pinkish in color. They are known for their malleability and ductility (ease of working), heat conductivity, and electrical conductivity. Copper does develop an oxide layer, or patina, when exposed to water.
In industrial use, it is typically specified where there is a need for either ductility (plumbing or roofing) or electrical conductivity (such as for electromagnets, bus bars, electrical motors,). In home/residential/architectural applications, it is typically used primarily for its color (i.e. a kitchen backsplash or cutting board) or its heat transfer properties (i.e. pots and pans).
Pure copper (alloys 101 – 110) are also often known as Electrolytic Tough Pitch or ETP Copper.