The alloy composed of Al(95.53%), Zn(2.85%), Sn(0.515%), Ga(0.1%) and
Sr(0.009%), with the weight percents in the parentheses, was prepared by
melting, using Al(99.84%), a product of the Aluminium Plant-Podgorica, as the
base material. The corrosion behaviour of this alloy was tested in relation
to the behaviour of the base metals, by both open curcuit potential and
polarization resistance methods, in aqueous solutions of both NaCl and
Na2SO4, the concentration of which varied within the range 0.00051 - 0.51 mol
dm -3. Over the whole salt concentration ranges, the corrosion parameters
indicate that the corrosion rate of the alloy is significantly higher than
the rate of the base material. For instance, for the concentration range
0.00051 - 0.51 mol dm -3 , the stationary open circuit potentials, related to
SCE, in NaCl solutions were - 1.200 to - 1.460 V for the alloy and - 0.693 to
- 0.920 V for Al, while in Na2SO4 solutions, the stationary open circuit
potentials were - 1.190 to - 1.465V for the alloy and - 0.780 to - 0.860V for
Al. At the same time, the corrosion current density in NaCl solutions varied
within 11-89 mA cm -2 for the alloy and 0.35 - 0.80 for Al, while in Na2SO4
solutions it amounted to 5.7.52 mA cm -2 for the alloy and 0.28 - 0.88 mA cm
-2 for Al.