Anodic Breakdown of Passive Films on Metals

Satô, Norio

doi:10.1149/1.2123808

Cited by 225 publications

(127 citation statements)

References 16 publications

(33 reference statements)

Supporting

Mentioning

117

Contrasting

Unclassified

Order By: Relevance

“…In this equation the overpotential at the film/solution interface is taken as constant (independent of the current density, i) because it is supposed that for an oxide the controlling reaction at this interface is the O 2-/H 2 O reaction, which can be considered practically in equilibrium in the passivity region, as long as the pH of the solution can be assumed constant [13,14] and the dissolution current can be disregarded [34].…”

Section: Model For Ultra-thin Films and Methods Of Calculation Of Parmentioning

confidence: 99%

“…Here, the metal/film overpotential must be taken into account, even for galvanostatic measurements, if it is wished to compare results at different current densities. On the other hand, the overpotential at the film/solution interface can be maintained constant when oxides are grown and the experiments are done under constant superficial pH [13,14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Galvanostatic Growth of Passivating Films Under Transient Conditions. I. Model and Quantitative Analysis for the Zn/ZnO System

D’Alkaine¹,

Berton²,

Tulio³

2003

Port. Electrochim. Acta

View full text Add to dashboard Cite

On the basis of an ohmic model and a Tafel equation describing relations between current density and overpotentials in the film and at the metal/film interface, respectively, it is shown that a quantitative analysis of galvanostatic transients for the growth of passivating ultra-thin films on the so-called non-noble metals can be obtained. As an example, the growth of ZnO on Zn in a boric/borate buffer solution is considered. In this case, the values of the transfer coefficient and the exchange current density of the reaction at the metal/film interface were found to be 1.2 and 0.11 mA cm -2 , respectively. It was shown that a single, first film occurred at low current densities and two films at high ones. The ionic resistivity inside the single, first film, during the transients, has an initial constant value region followed by a final increase indicating the aging process. For this variation the evolution of the point defect concentrations is taken into account. For the variation of the ionic resistivity with the galvanostatic current density two types of behaviors were found, depending on the current density. An interpretation of these results is advanced in terms of the concentrations, mobilities and recombination rate of point defects inside the film.

show abstract

Section: Model For Ultra-thin Films and Methods Of Calculation Of Parmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Galvanostatic Growth of Passivating Films Under Transient Conditions. I. Model and Quantitative Analysis for the Zn/ZnO System

D’Alkaine¹,

Berton²,

Tulio³

2003

Port. Electrochim. Acta

View full text Add to dashboard Cite

show abstract

“…This situation weakens the passive film. This view was further developed by Sato [21], who provided a more detailed picture of the model.…”

Section: The Corrosion Processmentioning

confidence: 98%

Chloride-induced corrosion on reinforcing steel: from the fundamentals to the monitoring techniques

Montemor¹,

Simões²,

Ferreira³

2003

Cement and Concrete Composites

432

142

View full text Add to dashboard Cite

One of the most important causes for reinforcing steel corrosion is the presence of chloride ions. They cause localised breakdown of the passive film that initially forms on steel as a result of the alkaline nature of the pore solution in concrete. The harmful chloride ions can be originated from the use of contaminated mix constituents or from the surrounding environment. The determination of a critical level, above which serious problems can occur, has been one of the main goals of investigation. Unfortunately, it is difficult to establish such a value since the chloride level is influenced by several factors. Thus, after concrete contamination, it is of fundamental importance to follow the activity of chlorides and the state of the reinforcing rebars. In this respect, the use of electrochemical techniques such as polarisation resistance, electrochemical impedance, galvanostatic pulse and potential measurements have shown to be powerful tools. Nevertheless, the interpretation of the results becomes sometimes a difficult task. A large number of authors have dedicated several studies to the interpretation of such measurements and a highly dispersed number of interpretations can be found in literature. The aim of this paper is to present an overview on the state-of-the-art of the most important aspects of the corrosion process initiated by chlorides, its development and monitoring techniques.

show abstract

“…Extensive studies have been carried out over the last century and continue aiming to estimate the conditions leading to local breakdown, gain a deeper understanding of mechanisms and processes underlying pitting and develop effective strategies of metal protection (Bohni, 1987;Frankel, 1998;Kaesche, 1986;Macdonald, 1992;Sato, 1982;Sato, 1989;Sato, 1990;Strehblow, 1995). Exploring the nonlinear dynamical phenomena associated with pitting corrosion of Fe and other metals might provide a new approach in investigating passivity breakdown from both mechanistic and kinetic points of view.…”

Section: Introductionmentioning

confidence: 99%

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Sazou¹,

Pavlidou²,

Diamantopoulou³

et al. 2012

Pitting Corrosion

View full text Add to dashboard Cite

Anodic Breakdown of Passive Films on Metals

Cited by 225 publications

References 16 publications

Galvanostatic Growth of Passivating Films Under Transient Conditions. I. Model and Quantitative Analysis for the Zn/ZnO System

Galvanostatic Growth of Passivating Films Under Transient Conditions. I. Model and Quantitative Analysis for the Zn/ZnO System

Chloride-induced corrosion on reinforcing steel: from the fundamentals to the monitoring techniques

Oscillatory Phenomena as a Probe to Study Pitting Corrosion of Iron in Halide-Containing Sulfuric Acid Solutions

Contact Info

Product

Resources

About