Comparison of the corrosion of bulk amorphous steel with conventional steel

The corrosion behaviour of one prominent bulk amorphous steel (BAS) alloy, (Fe44.3Cr5Co5Mo12.8Mn11.2 C-15.B-8(5.9))(98.5)Y-1.5, is compared to that of its crystalline counterpart and of the conventional steel X210Cr12. In acidic solutions, due to its single-phase nature, the BAS exhibits a much higher stability than the multiphase crystalline counterpart and the conventional steel. With increasing pH value, the overall elemental composition plays a more important role and the reactive elements Mo, Mn and Co, are assumed to be responsible for the observed lower stability of the BAS and its crystalline counterpart as compared to the conventional steel. (C) 2009 Elsevier Ltd. All rights reserved.