Electrochemical impedance of passive iron in sulfuric acid water-organic solutions

Influence of Organic Acids and Related Organic Compounds on Corrosion Behavior of Stainless Steel—A Critical Review

“…Uniform erosion-corrosion takes place in the stainless steel in the mixture of halogenated hydrocarbons. Crevice corrosion, erosion, and t-stress corrosion are caused by the mixture of trioxane, formic acid, water, and methanol in stainless steel and aluminum [49,50]. The corrosion failure of some organic compounds on some metals is given in Table 2.…”

“…Erosion plays a key role in failure while pit corrosion formation is caused by electrochemical corrosion [48]. The root causes of leakage are the composition (chlorides and sulfur), fluid flow rate, temperature, and pressure of the corrosive environment [49]. The corrosion of nickel in organic solvent + H 2 SO 4 exhibits unexpected behavior.…”

The Influence of Acidity, Chlorides and a High-Potential Quinone on the Corrosion of Hastelloy C-22 in Nonaqueous Solutions

“…4 The mechanisms by which metals stay passive in organic solvents are usually divided in four types: (i) preservation of airformed film; (ii) salt film formation; (iii) chemisorption of the solvent; and (iv) oxide/oxyhydroxide formation. Most of the corrosion studies carried in aprotic organic solvents have utilized pure metals, such as iron [5][6][7][8][9][10][11][12] and nickel. 5,6,13,14 Generally speaking, authors have observed that, in neutral anhydrous organic solutions, metals tend to remain passive by mechanisms i-iii, and addition of water is deleterious to passivity by locally acting as an acid, and interfering with passivation mechanisms.…”