Paper Title
A Study on Corrosion Behavior of Equal Channel Angular Pressed Al 2014 in Different Corrosive Medium

Abstract
In the present investigation, an attempt has been made to study the corrosion behavior of the Al 2014 after equal channel angular pressing (ECAP) in different corrosive medium such as 3.5 wt.% of sodium chloride, sodium sulfate, sodium nitrate and sodium fluoride solutions. Potentiodynamic polarization (PDP) results showed icorr values of about 2.72, 0.97, 0.51 and 0.22 �A/cm2 for Cl-, F-, NO3- and SO42- respectively for ECAPed sample. The highest icorr values of Cl- indicate the aggressive nature of the corrosive medium. The results obtained from both PDP and electrochemical impedance spectroscopy (EIS) revealed about four times increase in corrosion resistance behavior for the ECAPed sample than that of base sample in Cl- ion environment. Surface morphology image revealed that pitting occurred preferentially around the precipitates due to the attack of chloride ions, but the pit size is significantly smaller than unprocessed material. EDS analysis showed increased oxygen content on ECAPed sample surface after PDP analysis than base sample.