The correlation between molecular structure and tendency to maintain or to destroy iron passivity in aqueous solution—II. Activation effectiveness of anions present together with a corrosion inhibitor and/or an oxidant

Review—Electrochemical Migration in Electronic Materials: Factors Affecting the Mechanism and Recent Strategies for Inhibition

“…An ion with larger ionic charge and/or smaller radius has a larger charge density, therefore has a higher efficiency in breaking down a passive film. 21,78 Previous work 64 agreed well to this statement, where it was shown that the Cl − with smaller a ionic size has a…”

The role of conduction/valence bands and redox potential in accelerated mineral dissolution

“…The iodide ion is much more polariza- ble (i.e., its electron cloud is more easily deformed) and has a lower charge density than either bromide or chloride. This ability of the iodide ion to be easily polarized has been previously noted and is reponsible for stronger adsorption of iodide than bromide or chloride (Jesionek and Szlarska-Smialowska, 1983;Rostron, 1979;deCastro and Wilde, 1979). The difference in the degree of adsorption of the halides coupled with a distribution of surface energies on the MnO particles, arising from surface heterogeneities (Jansz, 1984) is responsible for the ordering of the rates shown in Figure 6.…”

“…The effects of anions on the corrosion rates of metals are frequently conflicting. Jesionek and Szlarska-Smialowska (1983), for example, report the inhibition of the dissolution of iron in acidic solutions by halide ions, while Rostron (1979) and deCastro and Wilde (1 979) report the breakdown of passivity (which amounts to accelerated dissolution) in the presence of halide ions.…”

The influence of Desulfovibrio vulgaris on the efficiency of imidazoline as a corrosion inhibitor on low-carbon steel in seawater

“…Studies have reported that the adsorption of organic inhibitors depends mainly on some properties of the molecules, related to their functional groups, on the possible steric effects and on the electronic density of donor atoms [10][11][12]; adsorption is also supposed to depend on the possible interaction between the inhibitor's p-orbitals and the surface atoms' d-orbitals [13,14], which induce to a greater adsorption of the inhibitor's molecules into the carbon steel surface [12,15], leading to the formation of a corrosion protecting film.…”