The corrosion of iron in sulphate solutions at pH = 0–2

Corrosion inhibition and adsorption behavior of methionine on mild steel in sulfuric acid and synergistic effect of iodide ion

“…Halide ions, at some concentrations, may replace hydroxyl ions adsorbed on the surface of the metal, thus leading to a reduction in the catalytic effect of the hydroxyl ions [34,35],…”

The Synergistic Effect of Iodide and Sodium Nitrite on the Corrosion Inhibition of Mild Steel in Bicarbonate–Chloride Solution

“…The replacement of the absorbed hydroxyl ions on the metal surface by halide ions can decrease the hydroxyl catalytic effect [27]: Fe + H 2 O + Y − ⇌ (FeYOH) − ads + H + + e (FeYOH) − ads → FeYOH + e FeYOH + H + ⇌ Fe 2+ + Y − + H 2 O where Y represents a halide ion. This replacement ability follows the trend ${\mathrm{I}}^{-}$ > ${\mathrm{Br}}^{-}$ > ${\mathrm{Cl}}^{-}$.…”

Synergistic inhibition effect of polyethylene glycol–polyvinyl pyrrolidone blends for mild steel corrosion in sulphuric acid medium

“…The anodic dissolution of iron in acidic solutions has been reported to proceed according to the mechanism 40,41 :…”