Effects of Boron on the Electrochemical Properties of Bulk Metallic Glasses Fe_(73.8-x)C_(7.0)Si_(3.5)B_xP_(9.6)Cr_(2.1)Mo_(2.0)Al_(2.0) (x = 3-7).

摘要

Effects of boron content on electrochemical properties of the bulk amorphous alloys Fe_(73.8-x)C_(7.0)Si_(3.5)B_xP_(9.6)Cr_(2.1)Mo_(2.0)Al_(2.0) (X = 3, 5, 7) that can be fabricated using hot metal and industrial raw materials have been investigated in the 3.5 percent NaCl solution, 1N H_2SO_4 solution and 1N HCl solution. Bulk amorphous alloys tend to readily passivated in the solutions exhibiting wide passive regions and low passive current densities. The increase of Boron content improves the corrosion resistance of bulk amorphous alloys in the 1N HCl solution. The origin of improvement of corrosion resistance of these alloys is attributed to the formation of Cr-rich passive film.