Study on the Effect of Water on the Formation and Pyrophoricity of Ferrous Sulfide

摘要

Rust formed by corrosion on the inner surfaces of oil tanks can react with humidity-saturated hydrogen sulfide. The reactions produce pyrophoric ferrous sulfide and can cause fire and explosions when exposed to air during production or maintenance. Water content has an important effect on both the formation and the pyrophoricity of ferrous sulfide and the effect was investigated in detail in this article. The experimental results showed that water is involved in oxidation reaction of ferrous sulfide and enhances the pyrophoricity, making ferrous sulfide more dangerous and able to easily cause fire or explosion accidents.