Corrosion inhibition of Schiff bases for Mg-Zn-Y-Nd alloy in normal saline: Experimental and theoretical investigations

In this research, three new Schiff bases were synthesized by paeonol and amino acids and tested as corrosion inhibitors for Mg-Zn-Y-Nd alloy. Weight loss measurements and electrochemical measurements demonstrated that three Schiff bases showed high inhibition efficiency on Mg corrosion. The corrosion products on Mg surface were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectrum (FTIR) and X-ray photoelectron spectroscopy (XPS). The possible inhibition mechanism was proposed, in which the Schiff bases react with Mg2+ ions to form complexes on Mg surface in inhibitors-containing electrolytes. The theoretical calculation of quantum chemical demonstrated the experimental findings.