CORROSION BEHAVIOR OF AZ91D MAGNESIUM ALLOY IN ALKALINE SOLUTION OF NaCl
压铸镁合金AZ91D在碱性NaCl溶液中的腐蚀行为

The corrosion behavior of AZ91D magnesium alloy in alkaline solution of NaCl was investigated by means of electrochemical means,and the corroded surface was examined by using SEM and EDX.The result showed that a stable passive film was formed on the alloy surface under the condition of pH=12 and concentration of Cl~- less than 0.1 mol/l;the pitting corrosion potential gradually decreased with the increase of Cl~- concentration; corrosion resistance of aluminumsaturated phase was better than the phase of matrix;the corrosion products were Mg(OH)_2 and MgO in alkaline solution of NaCl.