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Corrosion of a zinc-aluminium-copper alloy by fluorine gas

Authors
Journal
Materials Letters
0167-577X
Publisher
Elsevier
Publication Date
Volume
26
Identifiers
DOI: 10.1016/0167-577x(95)00208-1
Keywords
  • Corrosion
  • Zinc-Aluminium-Copper Alloy
  • Fluorine

Abstract

Abstract Corrosion of a commercial two-phase eutectoid zinc-aluminium alloy modified by 2% Cu (Zinalco™) was performed at high temperature in a dry fluorine environment. This environment was kept at a pressure of 10 3 mbar for 100 and 300 h. The exposed samples were studied by resonant nuclear reaction, Auger electron spectroscopy, scanning electron microscopy and X-ray diffraction. The Knoop micro-hardness of the samples was measured before and after the exposure. Intergranular corrosion of the zinc-rich phase that tends to consume the material is observed, while the aluminium bonds to the fluorine forming a superficial AlF 3 compound.

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