Corrosion protection by acrylamide treatment for magnesium alloy metal matrix composite(MMC) reinforced with titanium boride

摘要

Using potentiodynamic polarisation, polarisation resistance and electrochemical impedancespectroscopy measurements, the effect of amide treatment to magnesium metal matrix compositein 0.6 N sodium chloride medium has been studied. The corrosion potential E_(corr), corrosioncurrent I_(corr),polarisation resistance R_p and charge transfer resistance R_(ct)were determined fromthe corresponding plots. E_(corr)shifted towards more negative values while I_(corr) decreased withincreasing treatment time. Surface analysis with SEM and AFM showed an improvement insurface due to formation of a film. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) studies confirmed the film formation and the coordination of magnesium tothe oxygen in the amide compound.