Abstract
The corrosion behaviour of the following amorphous alloys in 2N H 2SO 4 was studied: (i) Fe 70Cr 10P 13C 7; (ii) Fe 60Cr 10Ni 10P 13C 7; (iii) FeNiB alloys with a ratio of nickel to iron of 0.6 and 14, 16, 22 and 24 at.% B; (iv) Fe 20Ni 60B 20. Potentiodynamic anodic polarization curves were obtained for each of these amorphous alloys in order to determine their corrosion properties. Scanning electron microscope morphology studies were also carried out for the corrosion-resistant amorphous Fe 70Cr 10P 13C 7 and Fe 60Cr 10Ni 10P 13C 7 alloys in their characteristic active, passive and transpassive behaviour regions. The corrosion resistance properties of the amorphous FeNiB alloys were found to be poor in 2N H 2SO 4. The present study clearly indicates the importance of elemental composition in controlling the corrosion of amorphous iron-base alloys.
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