Electrochemical behavior and surface chemistry of non‐equilibrium aluminum–tantalum alloys: Solute‐rich interphase mechanisms

Davis, Glyn; Shaw, B. A.; Rees, B. J.; Pecile, Cesare

doi:10.1002/sia.740230906

Cited by 14 publications

(12 citation statements)

References 44 publications

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“…[40][41][42][43][44] A few atomic percent of metal solute (e.g., Cr, Ta, Nb, W, Mo, Ti) will increase E P by around 200 mV, and increases of over 1 V are possible with higher amounts of alloying. Explanations for the improvement in pitting resistance conferred on Al by this nonequilibrium alloying have been offered based on influences on the composition and protectiveness or pH of zero charge of the passive film, 47 the solubility of dissolved species in the pit solution, 48 enrichment of the solute species at the active surface in a pit, 49 and decreases in the pit dissolution kinetics. 50 More on this is given below.…”

Section: Phenomenology Of Pittingmentioning

confidence: 99%

Pitting Corrosion of Metals: A Review of the Critical Factors

Frankel

1998

J. Electrochem. Soc.

1,677

786

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Pitting corrosion is localized accelerated dissolution of metal that occurs as a result of a breakdown of the otherwise protective passive film on the metal surface. This paper provides an overview of the critical factors influencing the pitting corrosion of metals. The phenomenology of pitting corrosion is discussed, including the effects of alloy composition, environment, potential, and temperature. A summary is then given of studies that have focused on various stages of the pitting process, including breakdown of the passive film, metastable pitting, and pit growth.

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Section: Phenomenology Of Pittingmentioning

confidence: 99%

Pitting Corrosion of Metals: A Review of the Critical Factors

Frankel

1998

J. Electrochem. Soc.

1,677

786

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“…The corrosion resistance of the ball-milled Al alloys was high despite a nonuniform microstructure. The improved corrosion resistance of these Al alloys was hypothesized due to one or more of the following mechanisms, which are proposed based on the literature on the sputter-deposited Al alloys, ball-milled alloys Al, and stainless steels 4,[12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of an in situ consolidated nanocrystalline Al-V alloy

et al. 2022

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Supersaturated solid solutions of Al and corrosion-resistant alloying elements (M: V, Mo, Cr, Ti, Nb), produced by non-equilibrium processing techniques, have been reported to exhibit high corrosion resistance and strength. The corrosion mechanism for such improved corrosion performance has not been well understood. We present a fundamental understanding of the role of V in corrosion of an Al-V alloy, which will provide a theoretical background for developing corrosion-resistant Al alloys. High-energy ball milling of the elemental powder of Al and V produced an in situ consolidated Al-V alloy, which exhibited high solid solubility of V. The corrosion resistance of Al-V alloy was significantly higher than that of pure Al, which was attributed to the (1) enrichment of V at the passive film/substrate interface, (2) incorporation of V into the passive film, and (3) deposition of V on the iron-containing cathodic particles and therefore, retardation of cathodic reaction.

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“…Amorphicity is associated with dispersed Co-oxide species, alumina underlayers to alumina hydrates, and intensively hydrated surface films at high passive potentials. [62,83] and Al supersaturated in TMs (W [59], Mo [59], and Ta [59,84]).…”

Section: Nature Of Surface Films In 1 M H 2 Somentioning

confidence: 99%

Electrochemical Behavior of Al–Al9Co2 Alloys in Sulfuric Acid

Sfikas

Lekatou

2020

CMD

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Al–Co alloys of various Co contents (2–20 wt.% Co) were fabricated by vacuum arc melting (VAM) with the scope to investigate the influence of cobalt on the microstructure and corrosion resistance of Al in 1 M H2SO4. The obtained microstructures were directional, consisting of Al9Co2 platelets (grown to coarse acicular plates as the Co content increased) uniformly dispersed in an Al-matrix. Alloying Al with Co did not decrease the rate of uniform corrosion of Al but it considerably increased its passivation ability. Moreover, all Al–Co alloys displayed lower uniform corrosion rate and notably higher passivation ability than market leading Al-alloys. The underlying mechanisms during anodic polarization in 1 M H2SO4 were identified and correlated with the microstructure. High Co content alloys (7–20 wt.% Co) presented superior passivation ability in 1 M H2SO4 as compared to the low Co content alloys.

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Electrochemical behavior and surface chemistry of non‐equilibrium aluminum–tantalum alloys: Solute‐rich interphase mechanisms

Cited by 14 publications

References 44 publications

Pitting Corrosion of Metals: A Review of the Critical Factors

Pitting Corrosion of Metals: A Review of the Critical Factors

Corrosion behavior of an in situ consolidated nanocrystalline Al-V alloy

Electrochemical Behavior of Al–Al9Co2 Alloys in Sulfuric Acid

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