Acid corrosion of amorphous and crystalline Cu-Zr alloys |
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| Institution: | 1. Institut d''Electronique, de Microélectronique et de Nanotechnologie (IEMN, CNRS-8520), Université Lille1, Avenue Poincaré—B.P. 60069, 59652 Villeneuve d''Ascq, France;2. Faculté des Sciences, Université Mouloud Mammeri, Tizi-Ouzou, Algeria;3. Centre de Recherche en Technologie des Semiconducteurs pour l''Enegétique (CRTSE), 2 Bd. Frantz Fanon, B.P. 140 Alger-7 merveilles, Alger, Algeria;1. Department of Electrical Engineering, University of Michigan, Dearborn, MI 48128, USA;2. Department of Mechanical Engineering, University of Michigan, Dearborn, MI 48128, USA;3. Presently at Department of Mechanical Engineering, Lamar University, Beaumont, TX - 77710, USA |
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| Abstract: | Corrosion resistance of amorphous and crystalline Cu45Zr55, Cu50Zr50 and Cu60Zr40 alloys in strong acid (CH+ = 1 M ℓ-1) solutions was investigated with the use of potentiodynamic and gravimetric techniques. It was observed that the corrosion resistance of these alloys tested in H2SO4 and HNO3 solutions was very high. However, amorphous Cu-Zr alloys exhibit a lack of resistance in HCl solutions where the corrosion rate increases with the rise of Cu content in the alloy (selective etching of Zr). Crystallization of alloys strongly improves their resistance to corrosion in HCl provided the Zr content in an alloy ⩾ 50 at%. |
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