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The influence of Cr addition on the corrosion resistance of Fe sub 73. 5 Si sub 13. 5 B sub 9 Nb sub 3 Cu sub 1 metallic glass in SO sub 2 contaminated environments

Abstract:

The influence of Cr concentration on the corrosion resistance of Fe sub 73.5 Si sub 13.5 B sub 9 Nb sub 3 Cu sub 1 metallic glass in simulated environments contaminated with SO sub 2 has been studied (0.1 M Na sub 2 SO sub 4 ). The corrosion kinetics has been analysed using direct current electrochemical techniques. Moreover, gravimetric tests were conducted in order to establish the reliability of the data obtained electrochemically. Cyclic polarisation measurements were made to study the possibility of localised corrosion. Every test was determined with the same material in different states: amorphous, nanocrystalline and crystalline. Furthermore, the study has also focused on the modification of the magnetic properties in the material as a result of Cr addition and the exposition to an aggressive medium. These properties mainly depend on the Cr concentration, and on the material state (amorphous …