Electrochemical Corrosion Behavior of Amorphous Alloys in Different Systems
Electrochemical corrosion behaviors of Hf28Be18Ti17Zr17Cu7.5Ni12.5,Zr41.2Ti13.8Cu12.5Ni10Be22.5,and(Cu43Zr48Al9)98Y2 amorphous alloys in 3.5%NaCl solution,1 mol/L HCl solution,and 1 mol/L H2SO4 solution were investigated,and compared with 304 stainless steel.The results reveal that in Cl-containing etchant,significant corro-sion occurs in all amorphous alloys,where the corrosion degree and corrosion current density of Hf28 alloy are the low-est,while Cu-based amorphous alloys undergo severe corrosion.In 1 mol/L H2SO4 solution,all amorphous alloys exhibit desirable corrosion resistance,with corrosion current densities around 10-7A/cm2 and positive corrosion poten-tials.Absence of corrosion trace was observed on the surfaces of alloys,indicating strong impact of Cl-on amorphous alloys,and passivation films were easily formed in oxidizing etchant,proving excellent corrosion resistance of amor-phous alloys.
Amorphous AlloysElectrochemical CorrosionCorrosion Current Density
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维普
