The surface of metallic lead is protected by a thin layer of lead oxide, PbO. Hence, it does not react with water under normal conditions.
So, under normal conditions lead does not react with water
. However, when lead comes in contact with moist air reactivity with water increases. A small lead oxide (PbO) layer forms at the surface of the metal. When both oxygen and water are present, metallic lead is converted to lead hydroxide (Pb(OH)2):