Effect of sulphate and molybdate ions on pitting corrosion of aluminium by using electrochemical noise analysis

Na, Kyung-Hwan; Pyun, Su‐Il

doi:10.1016/j.jelechem.2006.06.017

Cited by 61 publications

(41 citation statements)

References 26 publications

(20 reference statements)

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“…In addition, it is also possible to analyze data even when two or more failure modes are present at the same time. The cumulative probability F(t) of a failure system can be introduced just as Weibull distribution function based upon a ''weakest-link'' model [48][49][50][51][52][53], which is expressed as:…”

Section: Stochastic Model For Pit Initiationmentioning

confidence: 99%

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Corrosion behavior of Mg‐10Gd‐2Y‐0.4Zr alloy under thin electrolyte layers

Chen

Zhang

Meng

et al. 2010

Materials & Corrosion

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The corrosion behavior of Mg-10Gd-2Y-0.4Zr (GW102K) alloy under thin electrolyte layer (TEL) with various thicknesses was investigated by means of cathodic polarization curve, electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). Based on shot noise theory and stochastic theory, the EN results were quantitatively analyzed by using the Weibull and Gumbel distribution function, respectively. The experimental results showed that the anodic and cathodic processes of the corrosion of GW102K alloy were both retained under thin electrolyte layers. Whether under TEL or not, the cathodic process was dominated by hydrogen evolution reaction. The corrosion was more localized under thin electrolyte layer than that in bulk solution. The results also demonstrated that there were two kinds of effects for thin electrolyte layer on the corrosion behavior of GW102K alloy: (i) the rate of pit initiation was evidently retarded compared to that in bulk solution; (ii) the probability of pit growth decreased, which should be the real reason why the corrosion rate of GW102K alloy decreased with the decrease in layer thickness.

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Section: Stochastic Model For Pit Initiationmentioning

confidence: 99%

“…This just corresponds to the pit embryo formation rate in pitting corrosion [48][49][50][51][52][53].…”

Section: Stochastic Model For Pit Initiationmentioning

confidence: 99%

Corrosion behavior of Mg‐10Gd‐2Y‐0.4Zr alloy under thin electrolyte layers

Chen

Zhang

Meng

et al. 2010

Materials & Corrosion

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“…1, curves 2 [59,60]. The workers in these studies demonstrated that SO 4 2− ions accelerate the Al metal dissolution in NaCl solutions through the instantaneous formation of tunnels at the bottom of the pre-existing pits.…”

Section: Potentiodynamic Polarization Measurementsmentioning

confidence: 99%

Pitting corrosion of Al and Al–Cu alloys by ClO4− ions in neutral sulphate solutions

Amin

Rehim

Moussa

et al. 2008

Electrochimica Acta

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“…Recent studies on pitting corrosion of aluminum and its alloys have been carried out under the consideration of the pitting process described above [3][4][5][6]. The role of various additive anion species on pitting corrosion of aluminum has also been examined [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The effects of film thickness and incorporated anions on pitting corrosion of aluminum with barrier-type oxide films formed in neutral borate and phosphate electrolytes

Habazaki

Nishimura

Okitsu

et al. 2013

J Solid State Electrochem

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The pitting corrosion behavior of high purity aluminum covered with barrier-type anodic films, which are formed in neutral borate and phosphate electrolytes, has been examined in 0.5 mol dm -3 NaCl solution at an applied potential of -0.6 V vs Ag/AgCl, which is slightly nobler than the pitting potential of -0.64 V in the same solution. The pitting current density, i p , increased with time after an incubation time, t i . The double logarithmic plot of i p and polarization time, t, reveals two straight lines, which are separated at the time, . The slope becomes larger after  for the specimens anodized in the phosphate electrolyte, while it becomes smaller for those in the borate electrolyte.Both the t i and τ increase with the thickness of the anodic films, and at the similar film thickness they are much larger for the anodic films formed in the phosphate electrolyte than for those in the borate electrolyte. The corrosion process can be divided into three stages; the incubation period up to t i , the pit nucleation period before  and the pit growth period after . We have discussed the different pitting corrosion behavior of the aluminum specimens covered with the anodic films formed in the borate and phosphate electrolytes in terms of ion selectivity of the anodic films.

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Effect of sulphate and molybdate ions on pitting corrosion of aluminium by using electrochemical noise analysis

Cited by 61 publications

References 26 publications

Corrosion behavior of Mg‐10Gd‐2Y‐0.4Zr alloy under thin electrolyte layers

Corrosion behavior of Mg‐10Gd‐2Y‐0.4Zr alloy under thin electrolyte layers

Pitting corrosion of Al and Al–Cu alloys by ClO4− ions in neutral sulphate solutions

The effects of film thickness and incorporated anions on pitting corrosion of aluminum with barrier-type oxide films formed in neutral borate and phosphate electrolytes

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