Abstract
Corrosion behaviour of AZ31B magnesium alloy in different concentrations of NaCl solution saturated with CO 2 was studied by electrochemical techniques, Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray. The corrosion rate increases with increasing NaCl concentration both in the presence and absence of CO 2. The corrosion rate in NaCl solution saturated with CO 2 is bigger than that in single NaCl solution. The inhibitive effect of CO 2 is also observed with immersion time increased in NaCl solution saturated with CO 2, showing that CO 2 reduces the average corrosion rate due to the formation of insoluble products.
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