Different immersion periods and aqueous solutions effects upon the corrosion resistance of zinc and aluminium specimens
DOI:
https://doi.org/10.3989/revmetalm.2005.v41.iExtra.1017Keywords:
Corrosion resistance, Immersion periods, Corrosive media, Zinc, Aluminium, EIS, TafelAbstract
Several metallic materials form spontaneously an oxide film at the surface when is exposed in a corrosive environment. It is well known that the type of corrosive media may develop different results at the material corrosion resistance. The aim of the present paper is to investigate the influence of immersion periods and different solutions upon the corrosion resistance of pure Zn and Al specimens presenting different grain morphologies. The specimens were monitored for several periods in a 3 % NaCl solution at room temperature. Tests were also performed with variations of the 3 % NaCl solution modified by additions of acid and alkaline components. Both the electrochemical impedance spectroscopy (EIS) and polarization methods were applied.
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