An aes and sims study of the influence of chloride on the passive oxide film on iron

Goetz, R.; MacDougall, B.; Graham, M. J.

doi:10.1016/0013-4686(86)80151-7

Cited by 40 publications

(29 citation statements)

References 15 publications

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“…It can be inferred that chloride below the threshold value has no significant effect on the properties of the pre-passive film. Similar results were obtained in studying the influence of chloride on the passive oxide film formed on pure iron in borate solution, [44] as well as chloride-induced depassivation of black steel rebar in 0.1 M Ca(OH) 2 solution. [45] Therefore, in this study it is not necessary to discuss the effect of chloride on the properties of pre-passive film before depassivation.…”

supporting

confidence: 78%

The roles carbonate and bicarbonate ions play on pre‐passive HRB400 rebars in simulated pore solutions of deteriorating concrete

Shang

Meng

et al. 2018

Materials & Corrosion

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To evaluate the corrosion behavior of HRB400 rebars during the aging process of concrete, corresponding simulated concrete pore solutions were proposed. Using electrochemical measurements and XPS analysis, the depassivation conditions, properties of the pre‐passive films, and rebars corrosion rate were discussed. The effects of carbonate and bicarbonate ions, pH and chloride on the corrosion behavior of pre‐passive HRB400 rebars were investigated. Results show that the influence of carbonate and bicarbonate ions on the pre‐passive HRB400 rebars is reversed before and after its depassivation: before depassivation, carbonate and bicarbonate ions are detrimental to the stability of passive film, but beneficial after depassivation.

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supporting

confidence: 78%

The roles carbonate and bicarbonate ions play on pre‐passive HRB400 rebars in simulated pore solutions of deteriorating concrete

Shang

Meng

et al. 2018

Materials & Corrosion

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“…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. 59,[83][84][85][86][87][88][89][90] …”

mentioning

confidence: 99%

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

Natishan

O’Grady

2014

J. Electrochem. Soc.

230

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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“…The passivation of iron in pH 8.4 borate buffer solution at 0.0 V/SHE was studied by Goetz et al (1986) both in the presence and in the absence of 0.5 M chloride.…”

Section: Sims Studiesmentioning

confidence: 99%

Multi-scale investigation of the formation and breakdown of passive films on carbon steel rebar in concrete

Ghods¹

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An aes and sims study of the influence of chloride on the passive oxide film on iron

Cited by 40 publications

References 15 publications

The roles carbonate and bicarbonate ions play on pre‐passive HRB400 rebars in simulated pore solutions of deteriorating concrete

The roles carbonate and bicarbonate ions play on pre‐passive HRB400 rebars in simulated pore solutions of deteriorating concrete

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

Multi-scale investigation of the formation and breakdown of passive films on carbon steel rebar in concrete

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