| 摘 要： | The corrosion behavior of Mg–(0.25, 2.5, 5, 8 and 15)Y alloys in 3.5wt.% NaCl aqueous solution was investigated. It was found that the degree of corrosion deterioration increased with increasing immersion time up to 2 h. Corrosion modes for the alloys with low and high content of Y element were general corrosion and pitting corrosion, respective ly, and the threshold content for the corrosion mode change was 2.5% for the tested alloys. The experimental results showed that the addition of Y refined the grain of the alloy, and the distribution, i.e., continuous or not, of the Mg24Y5 phases had great effect on the corrosion rate and corrosion mode.
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