Nace Rp 0391 Pdf

: A range selector specifically for 90% to 100% H2SO4cap H sub 2 cap S cap O sub 4

When concentrated sulfuric acid (90% to 100% concentration) first touches a carbon steel tank, a violent reaction seems imminent. However, something remarkable happens: the acid immediately attacks the steel to form ferrous ions hydrogen gas . These ions quickly create a thin, protective layer of Iron Sulfate ( cap F e cap S cap O sub 4 on the surface. ScienceDirect.com nace rp 0391 pdf