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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,respectively,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.
The corrosion behavior of Mg- (0.25, 2.5, 5, 8 and 15) Y alloys in 3.5 wt.% NaCl aqueous solution was investigated. It was found that the degree of corrosion deterioration increased with increasing immersion time up to 2 h. modes for the alloys with low and high content of Y element were general corrosion and pitting corrosion, respectively, 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, ie, continuous or not, of the Mg24Y5 phases had great effect on the corrosion rate and corrosion mode.