The mechanism of the corrosion inhibition of carbon steel in neutral medium by chromate and nickel ions

Anticorrosive coatings: a review

“…Other authors describe the film composition as a mixture of oxides and hydroxides of iron and chromium. [279][280][281] Hydroxylated layers 277 and adsorbed Cr(VI) have also been reported. 281,282 Studies of chromate passive layers on zinc are scarce but studies report about a passive film of chromium(III) with the absence of zinc.…”

Corrosion evaluation of a metal in aqueous media: student corrosion experiment

“…The surface preparation of the commercial steel is the same as reported recently (2,3) with the following composition (w/o): C = 0.30; Mn = 0.65; S = 0.62; P = 0.02; and balance Fe. This steel foil of 0.10-cm thickness and 1,0 cm2 geometric area was annealed at 520°C and quenched in paraffin.…”

Using a Doe and Eis to Evaluate the Synergistic Effects of Low Toxicity Inhibitors for Mild Steel

“…Until the 80s, much of the corrosion inhibitor formulation was based on hexavalent chromium salts (chromates), due to their low cost and excellent performance to protect different metallic substrates in several aqueous environments (Gouda and Sayed, 1973;Hoar and Evans, 1932;Igual et al, 2007;Lemaitre et al, 1989;Mccafferty, 1989;Onuchukwu et al, 1984). However, because of their high toxicity, the use of these compounds is being increasingly restricted by environmental regulations.…”