The Influence of Alloying Elements on Aluminum Anodes in Sea Water

Reding, J. T.; Newport, J. J.

doi:10.3323/jcorr1954.16.2_68

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…Ga can negatively shift the potential of aluminum by 0.3-0.9 V [27]. The role of Ga in the aluminum matrix is to restrain the formation of an oxide film and improve the surface activity of Al [28].…”

Section: Introductionmentioning

confidence: 99%

The influence of temperature and dissolved oxygen on the electrochemical nature of Al–Zn–In–Ga galvanic anode

Zhang¹,

Du²,

Li³

2021

Surf. Topogr.: Metrol. Prop.

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The microstructure and electrochemical features of Al-Zn-In-Ga anode at different temperatures and dissolved oxygen concentrations were validated via scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and electrochemical tests in artificial seawater. The results show that the corrosion surface of Al-Zn-In-Ga alloy is relatively uniform at a temperature of 4 °C and dissolved oxygen of 2.5 mg l −1 ; accordingly, current efficiency is higher, but the cracking phenomenon is watched. In a solution of 25 °C and 7.3 mg l −1 dissolved oxygen, the content of In decreases enormously at the grain boundary, while Ga and Zn content increases sharply, which leads to the rugged surface.

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Section: Introductionmentioning

confidence: 99%

The influence of temperature and dissolved oxygen on the electrochemical nature of Al–Zn–In–Ga galvanic anode

Zhang¹,

Du²,

Li³

2021

Surf. Topogr.: Metrol. Prop.

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“…It is known that the addition of certain elements to aluminium, such as mercury (Hg), gallium (Ga), stanum (Sn), indium (In), magnesium (Mg), zinc (Zn), cadmium (Cd) and barium (Ba) results in alloys with more anodic potentials than unalloyed aluminium (Al) [1]. On the exposure to the atmosphere, the passive film formed on Al and retards further corrosion of the metal [2,3].…”

Section: Introductionmentioning

confidence: 99%

A Study of Al-Zn-Sn Alloy Sacrificial Anode Cathodic Protection Requirements for Structure Used In Seawater

Kamarudin

Daud

Sattar

et al. 2010

AIP Conference Proceedings

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The corrosion of aluminium (Al) alloys in seawater was investigated using potentiodynamic technique, complemented by Scanning Electron Microscopy (SEM), EDAX and XRD. SEM was used out to characterize the corroded surface and to observe the extent of corrosion attack on the Al alloys tested in seawater. EDAX analysis was used to identify elements present on the specimen surface. Where else XRD was to identify phase appearance. The results indicate that zinc (Zn), stanum (Sn) and copper (Cu) as alloying elements enhance corrosion behaviour of the aluminium in seawater by shifting the potential to a more negative value. In the presence of those elements, the Al alloys becomes more active, having potential of more than -1.0 V SCE and showed active corrosion behaviour.

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“…In particular, passivation has been reported for Cr, Ti, or Ta as dopants1-' and activation has been observed in aluminum samples doped with Zn or ln. 5,6 The occurrence of passivation, in particular, due to doping has been associated with effects due, for example, to modifications of the pH of zero charge,' variations in the solubility of the oxidized phase,' variations in the rate of dissolution of the alloy1 and the pairing of highly charged alloying element ions and mobile cation vacancies.' This is the first report of the results of calculations undertaken to discover whether any features of the electronic structure of doped aluminum, also, can be associated with the passivation or activation of aluminum due to the presence of dopants at the metalloxide interface.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structures of Aluminum and Aluminum Clusters Doped with Other Atoms

Brennan¹,

Breslin²,

Quinn³

1997

J. Electrochem. Soc.

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Electronic structure calculations have been carried out for various model Al ,J clusters with X an atom of an element known, or likely, to give rise to changes in the corrosion resistance of AIX alloys. The calculations involved the use of a novel orthogonal outer-sphere MSXa technique and results for the partial densities of states for the clusters Al , , , Al ,,l n, AI , , Zn, AI , , Cr, AI , , Ti , and A14,Ta are consistent with the hypothesis that activation of aluminum is to be expected for dopant atoms with filled d orbitals, giving rise to Friedel states.at the surface, while passivation is to be expected when the d-band density is distributed about the cluster Fermi level.

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The Influence of Alloying Elements on Aluminum Anodes in Sea Water

Cited by 4 publications

References 1 publication

The influence of temperature and dissolved oxygen on the electrochemical nature of Al–Zn–In–Ga galvanic anode

The influence of temperature and dissolved oxygen on the electrochemical nature of Al–Zn–In–Ga galvanic anode

A Study of Al-Zn-Sn Alloy Sacrificial Anode Cathodic Protection Requirements for Structure Used In Seawater

Electronic Structures of Aluminum and Aluminum Clusters Doped with Other Atoms

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