The atmospheric corrosion behavior of diecast AZ91D magnesium alloy deposited with different salts and in the presence of SO2 (25 ℃ and 850%±5 % RH) was studied by gravimetry, Fourier transform infrared spectroscope, scanning electron microscopy and X-ray diffraction. The result shows that there is synergetic effect o the soluble salts and SO2. Both the soluble salts and SO2 can accelerate the atmospheric corrosion of AZ91D magnesium alloy. The synergetic effect of the soluble salts and SO2 may enable the atmospheric corrosion of metallic materials greater than that caused by single component of the two respectively.
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