Effects of Sb Element on Corrosion Resistance of Mg-6Al Alloy in Simulated Low-Concentration Chloride Environment
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Graphical Abstract
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Abstract
The corrosion rates of Mg-6Al alloys with different antimony content in simulated low-concentration chloride environment were studied by immersion corrosion test. The micro morphology of corrosion products on the surface of Mg-6Al alloy were observed by optical microscope and scanning electron microscope. The results showed that with the increase of antimony element mass fraction from 0.5% to 1.5%, the corrosion rate of Mg-6Al alloy decreased first and then increased, the grain size of the alloy decreased first and then increased, and the surface corrosion products decreased first and then increased gradually. When the mass fraction of antimony was 0.5%, the grain size of Mg-6Al alloy was the smallest, and its corrosion rate was greatly reduced. Its surface had less corrosion products, and corrosion resistance was the best.
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