Corrosion behavior of monophasic and multiphasic Al50Au50 ribbons in AlCl3 + HCl solution

Abstract

Monophasic Al50Au50 ribbons (labelled as S2ann) were obtained by melt spinning and annealing. The corrosion properties of S2ann were investigated in AlCl3 + HCl solution with as-spun multiphasic ribbons (labelled as S2sp) for comparison. S2ann is self-passivated and has a wide passivation region, while S2sp tends to undergo Al2Au-induced selective dissolution under anodic polarization. Besides, S2ann has a fluctuant open-circuit potential and a passive film with p-type semiconductor feature, which are not found in S2sp. The passive film of S2ann is examined to be Au-contained Al2O3 with a double-layer structure.

Keywords

AlAu alloy, Au-contained Al2O3, OCP fluctuation, Passive film, Space-charge region Alumina, Aluminum chloride, Aluminum corrosion, Aluminum oxide, Binary alloys, Chlorine compounds, Corrosive effects, Gold alloys, Hydrochloric acid, Melt spinning, Corrosion property, Double layer structure, OCP fluctuation, Open circuit potential, P type semiconductor, Passive films, Selective dissolution, Space charge regions, Aluminum alloys

Document Type

Journal Article

Date of Publication

1-1-2020

Publication Title

Corrosion Science

Publisher

Elsevier

School

School of Engineering

RAS ID

30913

Comments

Yan, Z. C., Zhang, H., Chen, Q., Li, G. H., Zhang, L. C., Bian, X. F., & Wang, W. M. (2020). Corrosion behavior of monophasic and multiphasic Al50Au50 ribbons in AlCl3+ HCl solution. Corrosion Science, 165, Article 108398. https://doi.org/10.1016/j.corsci.2019.108398

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Link to publisher version (DOI)

10.1016/j.corsci.2019.108398