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Electrochemical impendence study of an AL 8088 /SiC Nano composite immersed in 1M Acid chloride Medium

Kari RamaKrishna, Pruthviraj R D

Abstract


Aluminum Nano composite have received considerable attention among researcher and engineering as a prominent choice material for building and construction purposes. The preference of Aluminum Nano composite as replacement for conventional Aluminum alloy is chiefly due excellent strength to weight ratio .However the problem of accelerated corrosion attributed to the reinforcement particle used in the production of Aluminum Nano composite is well documented in the literature and serves as potential limitations for its applications. In this work is an attempt was made to study the influence of chromium (cr) additions on the corrosion behavior of AL 8088 sic composite. The novel AL 8088/sic composite were prepared with 0, 2, 4 and 6 wt. % Nano SiC by using a stir casting technique. Electrochemical impendence spectroscopy (EIS) was used to study the corrosion behavior of the as cast composite surface when immersed in 3.5 wt. % From the Nyquist plots and equaling circuit fitting results the charge transfer resistance values were observed to change from 10 to 3.7 30 to 9.5 19 to 2.8 for 0,3 and 6 wt. % cr content respectively after 72 hours of exposure . The increase in charge Transfered resistance value obtained with increasing cr content was a clear indication of improved resistance to corrosion

Keywords


Keywords: Aluminum 8088, SiC nanocomposite, EIS, Tafel plot.

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References


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