On the unusual morphology of pitting corrosion of amorphous NiZr alloys

Effect of Structural Defects, Surface Irregularities, and Quenched-In Defects on Corrosion of Zr-Based Metallic Glasses

“…The presence of irregular surface morphology is believed to have reduced the corrosion resistance of the air-side surface of the melt-spun ribbon. Asami et al [30] have reported in their study of the pitting corrosion of amorphous Ni-Zr alloys that the main reason for the low pitting potential is the irregular surface morphology. The results of the present investigation indicate that the surface topological defects (air pockets and irregular surface morphology) are more detrimental than the medium-range order, from the viewpoint of corrosion.…”

Binary Zr–Ni/Co metallic glass films: Role of the structural state on their durability

“…The published data on corrosion mechanisms of Zr-based binary TFMGs are limited and the corrosion mechanisms of Zr-Ni and Zr-Co TFMGs, to the best of our knowledge, have not yet been investigated. The superior corrosion resistance of bulk Zr-Ni alloys have been reported in several electrochemical studies, due to the high passivation characteristics of nickel, able to slow down oxidation rate more efficiently than with other metals such as copper or iron [29,[35][36][37][38]. Corrosion studies on cobalt-containing alloys are rather limited when compared to those on iron, copper or nickel.…”

Effect of ion beam irradiation on the corrosion behavior of the melt-spun ribbon Ti60Ni40

“…In our group several investigations were carried out on the corrosion behavior of several amorphous alloys Ti 60 Ni 40 , Ti 50 Cu 50, Ti 48 Cu 52 , Zr 67 Ni 33 , Zr 46.75 Ti 8.25 Cu 7.5 Ni 10 Be 27.5 and Zr 65 Cu 17.5 Ni 10 Al 7.5 and it was reported that Ti 60 Ni 40 exhibits superior corrosion resistance as compared to other amorphous alloys [8,9]. In contrast to a large number of investigations carried out on corrosion behavior of amorphous alloys, [4][5][6][7][8][9][10][11][12][13] only few investigations are available on corrosion behavior of the amorphous alloys after surface modification by ion beam irradiation [14][15][16]. This motivated us to carry out the present investigation on the effect of ion beam irradiation on the corrosion behavior of amorphous Ti 60 Ni 40 in 1 M HNO 3 aqueous medium.…”