Role de la diffusion dans les phenomenes de passivation et de corrosion localisee du fer en milieu acide

Epelboin, I.; Gabrielli, C.; Keddam, M.

doi:10.1016/s0010-938x(75)80006-0

Cited by 34 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…18,[36][37][38] For a theoretical one-dimensional pit, Galvele 18 demonstrated that a critical product of the current density and pit depth -(i • x) -must be maintained within the pit to prevent repassivation. This parameter, later termed the pit stability product, 39 quantitatively represents the steady-state condition arising from the competition between the metal dissolution and diffusion fluxes 40,41 which results in the maintenance of a sufficiently aggressive concentration of metal cations at the actively dissolving surface for continued pitting.…”

mentioning

confidence: 99%

A High-Throughput Artificial Pit Technique to Measure Kinetic Parameters for Pitting Stability

Srinivasan

McGrath

Kelly

2015

J. Electrochem. Soc.

View full text Add to dashboard Cite

A cyclic electrochemical technique was developed which enables rapid, high-throughput extraction of important kinetic parameters from one-dimensional artificial pit (lead-in-pencil) electrode experiments. This approach combined methods for pit initiation and propagation with kinetic measurements at a series of pit depths to measure two key kinetic parameters -the pit stability product under a salt film (i·x) saltfilm and the repassivation potential E rp -from a single experiment. The entire sequence was cycled and automated for efficient, high-volume data collection and analysis for the case of stainless steel in neutral chloride solution. This method offered advantages in the extraction and interpretation of data from a wide range of pit depths, permitting statistical analysis of the kinetic parameters required for determining the critical conditions for pit stability and repassivation.

show abstract

mentioning

confidence: 99%

A High-Throughput Artificial Pit Technique to Measure Kinetic Parameters for Pitting Stability

Srinivasan

McGrath

Kelly

2015

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Celle-ci est caracte´ristique du gradient de concentration dans le processus e´lectrochimique a`l'inte´rieur des piquˆres. 19 En effet, on observe simultane´ment, a`la surface des e´chantillons de fer, l'existence de profondes piquˆres. Dans leur e´tude sur l'inhibition de la corrosion du fer dans HCl par l'alcool propargylique, Pathania et Poling 20 ont observe´le meˆme phe´nome`ne, au voisinage de À340 mV.…”

Section: Effet D'une Polarisation Anodiqueunclassified

Inhibition de la corrosion du fer dans HCL 1 M. Partie II. Etude des propriétés inhibitrices du 2-aminothiophénol et du 2-aminophényl disulfure, par spectroscopie d'impédanceFor Part I, see ref. 1.

et al. 2002

View full text Add to dashboard Cite

“…J is expressed as and ro nF . J = RT~K % [4] ro nF 5 --~ ti~l [5] i~v~ is the average dissolution current density. For iron dissolution, io was assumed to be very small 8 and, as a result, the approximation J = 0 was taken to calculate the distributions.…”

Section: Theoreticalmentioning

confidence: 99%

Study of the Anodic Current‐Voltage Curve of an Iron‐Nickel Alloy in Normal Sulfuric Acid

Ponthiaux

Wenger

Galland

1995

J. Electrochem. Soc.

View full text Add to dashboard Cite

The anodic steady-state polarization curve of an Fe-31% Ni rotating disk electrode in normal sulfuric acid was studied. As in the case of iron in similar conditions, a Z-shaped curve was found and, in a part of the curve, called the transition region, several e~ectrochemical processes (homogeneous dissolution, intergranular dissolution, passivation) coexist on different areas of the electrode surface. The experimental study of the current density distributions and dissolution morphologies on the electrode surface, in the different regions of the curve, allowed us to test the validity of a theoretical mode] developed to explain the curves of iron electrodes. In this way, we could point out significant differences between the processes occurring at iron and iron-nickel electrodes, and we obtained the current density-potential relationship describing the kinetic laws of the processes.

show abstract

Role de la diffusion dans les phenomenes de passivation et de corrosion localisee du fer en milieu acide

Cited by 34 publications

References 12 publications

A High-Throughput Artificial Pit Technique to Measure Kinetic Parameters for Pitting Stability

A High-Throughput Artificial Pit Technique to Measure Kinetic Parameters for Pitting Stability

Inhibition de la corrosion du fer dans HCL 1 M. Partie II. Etude des propriétés inhibitrices du 2-aminothiophénol et du 2-aminophényl disulfure, par spectroscopie d'impédanceFor Part I, see ref. 1.

Study of the Anodic Current‐Voltage Curve of an Iron‐Nickel Alloy in Normal Sulfuric Acid

Contact Info

Product

Resources

About