Corrosion Resistance of Ribbon and Bulk Amorphous Alloys Based on Iron

We study the structural and corrosion characteristics of bulk and ribbon HBPC-2 and NHRP-1 complexly doped alloys based on iron. On the basis of the results of X-ray energy dispersion analysis, we determine their compositions more precisely and show that the HBPC-2 alloy was doped with phosphorus. By the method of diffraction analysis, it is shown that the specimens of ribbon alloys have amorphous structures, while the structure of bulk specimens is amorphous-crystalline and the nanocrystals in their amorphous matrix are 50 nm in size. The bulk specimens exhibit higher corrosion resistance in a 3% NaCl solution.