The corrosion inhibition of WE43 Mg alloy by salicylic acid (SA) and 3,5-dinitrosalicylic acid (DNSA) was
investigated in a 0.2 M NaCl solution using electrochemical techniques, pH measurements, inductive coupled
plasma-optical emission spectroscopy (ICP-OES) and SEM-EDX analyses. SA has a poor performance while DNSA
was efficient after some hours of immersion in the NaCl solution. The observed behaviour was attributed, for
short immersion times, to a buffering effect of DNSA which delayed the Mg(OH)2 crystal growth on the alloy
surface, and for longer immersion times, to an enrichment of the corrosion products layer by the alloying
elements.
Mg-RE magnesium alloys, Corrosion inhibitors, NaCl solution, Electrochemistry,Hydroxo-complexes