The electrochemical corrosion characteristics are discussed for amorphous and crystalline Fe₅₉Co₁₀Zr₂Y₄Nb₅Ni₅B₁₅ alloy in acidified (pH = 3), deaerated, 0.5 M sulphate- and phosphate solutions at 25^oC. Potentiokinetic polarisation curves have been measured for both structural states of the tested material and compared with those determined for pure, crystalline iron. Both in acidified sulphate- and in phosphate solutions the alloy corrodes in active state and its anodic external currents are clearly smaller than those for pure iron. The anodic active dissolution of the amorphous alloy occurs ca one order of magnitude slower than that of the crystalline alloy. The effect of strong inhibition of corrosion in passive state is especially distinct for amorphous alloy in phosphate solution. In spite of considerable presence of cobalt, the amorphous alloy shows distinctly lower anodic currents in passive state as compared to pure iron. The beneficial role of alloy amorphisation in corrosion behaviour can be explained in terms of limiting number of structural deffects and lack of grain boundaries in amorphous state. The alloy amorphous structure favours better continuity of oxide layers formed in passive region and decreases number of active sites in active range.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/20319 must be provided.

1. Study of the microstructure and magnetic properties of Fe₆₀Co₅Zr₁₀Mo₅B₂₀ bulk amorphous and partially crystallized soft magnetic alloy.
2. Study of the mechanical and magnetic properties of Fe₆₁Co₁₀Zr_5-xHf_xW₂Y₂B₂₀ (x = 0, 3) bulk amorphous and crystalline alloys 
3. Microstructure, thermal stability and magnetic properties of bulk amorphous Fe_73-xCo_xNb₅Y₃B₁₉ (x = 0 or 10)
4. Structural and magnetic properties of multilayer system ferromagnetic/metallic separator/ferromagnetic
5. Thermal stability and soft magnetic properties of  Fe₆₁Co₁₀Zr_2,5Hf_2,5Me_4-xW₂B₂₀ (Me = Nb, Mo, Ti, Y, Ni) bulk amorphous alloys obtained by induction suction method.
6. Phase decomposition and some magnetic properties in bulk amorphous multicomponent Fe‑based alloys
7. Structure and approach to magnetic saturation in the Fe₃₆Co₃₆B₁₉Si₅Nb₄ bulk amorphous alloy