1.
n. [Enhanced Oil Recovery]
A
corrosion by-product [FeS
2] formed when hydrogen
sulfide [H
2S] contacts the iron [Fe] present in steel.
Ferrous sulfide is a black crystalline material at bottomhole conditions. However, when it contacts air at surface, it will be converted into iron oxide, which is a red-brown compound.
Ferrous sulfide is also called
iron sulfide.