Corrosion behaviors of Zr-based metallic glass(Zr

0.55

Cu

0.30

Al

0.10

Ni

0.05

)

99

Y

1

were investigated using immersion tests and potentiodynamic polarization tests.Pitting was observed by naked eyes after the sample was immersed in 3.5%NaCl solution for 49h

and absence of obvious corrosion was observed by naked eyes after the sample was immersed in 1mol/L H

2

SO

4

solution or 1mol/L NaOH solution for 434.5h.Potentiodynamic polarization curves of the samples tested in 0.001

1

mol/L H

2

SO

4

1mol/L NaOH and 3.5%NaCl solutions all show the passivation regions

indicating good corrosion resistances.In 3.5%NaCl solution

the spontaneous corrosion potential is the lowest of-0.323V

SCE

and the corrosion current density is the highest of 7.6×10

-5

A/cm

2

and the passivation region is the narrowest of 0.438V

indicating the worst corrosion resistance.The corrosion resistance in 1 mol/L NaOH solution is in the middle

while the corrosion resistance is the best in 1mol/L H

2

SO

4

solution.