Abstract
Abstract The influence of SrCl2 on the corrosion behavior of magnesium (Mg) in 3.5 wt.% NaCl was evaluated by immersion testing, electrochemical measurement and the examination of the corrosion morphology. A small addition of SrCl2 decreased the corrosion rate of Mg. In contrast, an excess of SrCl2 increased the corrosion rate of Mg, even higher than that in 3.5 wt.% NaCl. There is a competition effect of the SrCl2 on the corrosion behavior of Mg in 3.5 wt.% NaCl. The Sr2+ can improve the protection of corrosion product film through the formation of SrCO3. While the Cl− can damage the protection of the corrosion product film. The Mg specimen achieved the best corrosion resistance in 3.5 wt.% NaCl + 0.005 mol L−1 SrCl2.
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