Hindgut fermentations in nonavian species

McBee, R. H.

doi:10.1002/jez.1402520509

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…al. ; 51,70 chemo-mechanical model first proposed by Hoar; 5 and ion migration to and reaction at the oxide/metal interface suggested by many 3,5,7,10,12,14,39,51,52,70,91 and recently refined by McCafferty 13,14 are plausible theories considering the experimental results. At the present time McCafferty's stepwise model shows the most significant agreement with the overall experimental data predicting: Cl − is adsorbed and incorporated in the oxide film, moves toward the metal-oxide interface, a lower i pass with Cl − incorporation, oxide thinning prior to E pit , and the formation and rupture of blisters.…”

Section: Authors' Interpretation Of the Resultsmentioning

confidence: 94%

Chloride Ion Interactions with Oxide-Covered Aluminum Leading to Pitting Corrosion: A Review

Natishan

O’Grady

2014

J. Electrochem. Soc.

238

122

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Metals and alloys such as aluminum (Al), stainless steels, and nickel-based alloys exhibit corrosion resistance in a wide range of environments due to the presence of protective, passive oxides. However, in environments that contain aggressive anions such as chloride, Cl − , the passive film becomes unstable and degrades locally causing film breakdown and pitting corrosion. A number of theories describing the initiation of pitting corrosion have been postulated and discussed but to date there is no consensus on the mechanism of breakdown. Since all current mechanisms require Cl − interactions for oxide film breakdown in Cl − containing environments, the question is what is the nature of the interaction of aggressive anions such as Cl − with the passive film, adsorption and/or absorption, leading to pitting? This communication focuses on the interaction of Cl − with the passive oxide film on pure aluminum by reviewing and summarizing the available experimental data concerning Cl − interactions. It should also be noted that the observations for Cl − interactions with Al reviewed and summarized herein might not be applicable to all metals and alloys. Technologically important metals and alloys such as aluminum (Al), stainless steels, and nickel-based alloys exhibit corrosion resistance in a wide range of environments due to the presence of protective, passive oxides.1-90 The passive oxides behave as kinetic barriers, which inhibit further oxidation of the underlying thermodynamically reactive metals. However, in environments that contain aggressive anions such as chloride, Cl − , the passive film becomes unstable and degrades locally causing film breakdown and localized corrosion, which in turn decreases the service life of the materials. The consequence of discrete oxide failure is localized corrosion, which occurs in the forms of crevice corrosion in occluded sites and metastable or stable pitting corrosion on open surfaces. It is generally agreed that localized corrosion occurs in two distinct steps: initiation and propagation.A number of theories describing the initiation of pitting corrosion have been postulated and discussed.

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