Closure to “Discussion of ‘On the Kinetics of the Breakdown of Passivity of Preanodized Aluminum by Chloride Ions’ [Z. A. Foroulis and M. I. Thubrikar (pp. 1296–1301, Vol. 122, No. 10)]”

Abstract

1975). aJ zL A. Foroulis and M. J. Thubrikar, Werksto~e Korrosion, 2S, 350 (1979). ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2015-03-24 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2015-03-24 to IP

Catalytic impact of alloyed Al on the corrosion behavior of Co50Ni23Ga26Al1.0magnetic shape memory alloy and catalysis applications for efficient electrochemical H2generation

“…Breakdown of passivity and subsequent formation of pits initiate as a result of the adsorption of Cl À anions on the oxide/solution interface assisted by applied electric eld. 27 This adsorption process is favored at the active sites (defects and awed regions 27 ) of the passive layer and occurs in competition with the passivating (passive layer forming) species, namely dissolved O 2 [29][30][31][32] Once formed, the soluble species leave the oxide lattice and goes in solution, causing thinning and localized dissolution of the oxide lm. 31 Once the passive lm is locally dissolved, pit nucleates at E b and dissolution of the base metal commences.…”

“…When the potential exceeds E b , pit initiates. This in turn makes the medium locally acidic (where the solution chemistry inside the pit is different from that outside it 28,29 ), hence allowing for efficient oxide dissolution and pit growth. [28][29][30][31] This makes j pass increase drastically (region I).…”

“…Then it reaches its minimum value, corresponding to the maximum thickness and protectiveness of the passive layer, at a certain time known as the incubation time (t i ); the time required for local removal of the passive lm via the sequence of Cl À adsorption, penetration and formation of soluble complexes. [29][30][31][32] It indicates the beginning of the pit nucleation period, where its magnitude reects the susceptibility of the oxide lm to breakdown.…”

Characterization of the chemical conversion films that form on Mg−Al alloy in colloidal silica solution

“…Many surface treatments prevent the corrosion of magnesium and Mg-Al alloys, including chromate chemical conversion (CCC) [1][2][3][4][5], anodizing [6,7], painting, electroplating, etc. CCC films are still one of the most efficient surface treatments for Mg alloys and galvanized steel.…”

Characterization of the Silica Conversion Film Formed on Zinc-Electroplated Steel

“…However, when the zinc surface is exposed to the atmosphere or aqueous solutions, corrosion product containing Zn(OH) 2 is rapidly generated. Many surface treatments are used to prevent corrosion, including chromate chemical conversion (CCC), [1][2][3][4][5] anodizing, 6,7) painting, and electroplating. CCC is still one of the most efficient industrial surface treatments for electroplating steel.…”