Oxide film growth on Al–In alloys in a borate buffer solution in conditions of galvanostatic anodising

Gudić, Senka; Radošević, Jagoda; Višekruna, Antonija; Kliškić, Maja

doi:10.1016/j.electacta.2003.09.031

Cited by 14 publications

(5 citation statements)

References 48 publications

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“…The values of a* are the same order of magnitude as those previously reported for Al [2,6], Al-alloys [6,27] and other valve metals [2,28]. The half width of the barrier to ion movement increases as pH increases, which is in agreement with the results of the pH dependence of ionic conductivity through the oxide layer.…”

Section: Potentiodynamic Polarizationsupporting

confidence: 89%

“…This means an insufficient number of mobile ions in the beginning and a delay of oxide growth. Some authors have reported the existence of a current peak on the potentiodynamic curves recorded on Al, Al-Sn and Al-In alloy electrodes in different media [2,6,26,27]. Similar to the current shoulders, these current peaks appeared at potentials before the steady state current was established.…”

Section: Potentiodynamic Polarizationmentioning

confidence: 91%

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The growth kinetics and properties of potentiodynamically formed thin oxide films on aluminium in citric acid solutions

Hasenay

Šeruga

2007

J Appl Electrochem

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The growth kinetics and properties of potentiodynamically formed thin oxide films on Al were investigated in 0.05 M citric acid solutions of different pH (5, 6 and 7) by means of potentiodynamic polarization and a.c. electrochemical impedance spectroscopy (EIS) measurements. Al showed passive behaviour within the pH range that was examined. The potentiodynamic growth of the oxide film on Al takes place due to ionic conductivity under the influence of the high electric field. Characteristic kinetic oxide film growth parameters such as the high-field growth exponential law constants (A and B), ionic conductivity through the oxide film, field strength and half barrier width have been calculated. Impedance measurements were used to determine the parameters related to the characteristic sizes and properties of oxide film. The capacitive response of the impedance spectrum was related to the thickness and dielectric properties of the barrier oxide film. The oxide film resistance values were very high, indicating that the oxide films formed under potentiodynamic conditions are highly uniform in thickness and very resistant. The anodic behaviour of Al in the citric solutions under potentiodynamic conditions were characterized by the rapid growth of the oxide film which diminished the influence of relaxation processes on the growth kinetics and structural characteristics of the aluminium/anodic oxide film/electrolyte system.

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Section: Potentiodynamic Polarizationsupporting

confidence: 89%

Section: Potentiodynamic Polarizationmentioning

confidence: 91%

The growth kinetics and properties of potentiodynamically formed thin oxide films on aluminium in citric acid solutions

Hasenay

Šeruga

2007

J Appl Electrochem

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“…The anodic passivation current increases with the pH from 7.2 to 8.2 for a given temperature, which indicates the passivation properties of Al corrosion in such special solution depends on solution pH. EIS measurement which has been successfully used to characterize the property of the passive oxide lm on aluminium alloys, 27,35,36,[40][41][42][43][44] was conducted. The impedance spectra of 1100 Al alloy aer 48 h of immersion in test solutions are presented as Nyquist and Bode plots in Fig.…”

Section: Identication Of the Passivation Layermentioning

confidence: 99%

“…The inductive behaviour is observed at LF which corresponds to Gudic's EIS results of aluminium alloys in borate buffer solution. 35,43 The inductive loop at LF may be related to the coverage of adsorbed species at the passive lm. 42,43 Studies have found that Al(OH) 3 adsorbed a great quantities of boron, and the experimental evidence and various mechanisms are reviewed in ref.…”

Section: Identication Of the Passivation Layermentioning

confidence: 99%