(Université de M'sila, 2018) Abdelkader Hanna; Achour Dakhouche; Kamel Tirsatine; Ali Sari; Yazid Khereddine; Djamel Bradai; Hiba Azzeddine
The aim of the present study is to investigate the effect of deformation conditions on the corrosion
behavior of AZ31 (Mg-3Al-1Zn,%wt.) in 0.9% NaCl (wt.%) solution. The AZ31 alloy was hot rolled at 360 °C to
20 and 50% of thickness reduction. Electrochemical measurements were used to study the corrosion behavior of
AZ31 alloy. Analysis of corrosion products after immersion test was performed using optical microscopy, X-ray
diffraction and Raman spectroscopy. The mechanical properties of corroded samples were investigated using
tensile test at room temperature. Results indicated that the corrosion rate was strongly affected by the hot
rolling level. A lower corrosion potential and reduced polarization resistance was observed after hot rolling
compared to the as received AZ31 alloy. The corrosion product was evidenced mainly as Mg(OH)2 compound
exhibiting a filiform-like morphology. Apparently, the corrosion improved the room temperature ductility of
AZ31 alloy.