Stress Corrosion Cracking Regions on Contour Maps of Dissolution Rates for AISI 304 Stainless Steel in Sulfuric Acid Solutions with Chloride, Bromide, or Iodide

Localized corrosion and stress corrosion cracking of stainless steels in halides other than chlorides solutions: a review

“…This occurs in a specific range of halide ion concentration and at a potential close to the corrosion potential, where the alloy is actively dissolving. Outside this potential range, the alloy failed by uniform attack or water-line corrosion (Asawa, 1987). Cl − , Br − , and I − acted as dissolution inhibitors when their concentrations were below 10 −1 , 2 × 10 −3 , and 3 × 10 −4 m, respectively; beyond these concentrations, they promoted uniform corrosion (Asawa, 1987).…”

“…Most cases of SCC occur when the bulk surface of the stainless steel is in the passive state. However, it has been shown (Acello & Greene, 1962;Asawa, 1971Asawa, , 1987 that dilute additions of Cl − , Br − , and I − to a H 2 SO 4 solution cause the SCC of the solution annealed type 304 stainless steel. This occurs in a specific range of halide ion concentration and at a potential close to the corrosion potential, where the alloy is actively dissolving.…”

“…Outside this potential range, the alloy failed by uniform attack or water-line corrosion (Asawa, 1987). Cl − , Br − , and I − acted as dissolution inhibitors when their concentrations were below 10 −1 , 2 × 10 −3 , and 3 × 10 −4 m, respectively; beyond these concentrations, they promoted uniform corrosion (Asawa, 1987). SCC was observed in a potential and halide ion concentration where the uniform dissolution rate was lower than 1 nm/s, regardless of the nature of the halide ion (Asawa, 1987).…”