Abstract
The manufacturing of the high purity magnesium and especially of the Iron Free Magnesium (I. F. M.) were studied and the semiindustrial manufacturing of the I. F. M. was succeeded.The corrosion resistance of the I. F. M. for 3% NaCl solution is exellently good. Using the I. F. M., the effects of Fe, Mn, Na, Al, and Zn on the corrosion resistance and other properties of magnesium were studied and the results were as follows:When iron is less than 0.0014%, the corrosion resistance of magnesium is excellently good, but over this percentage of iron, the corrosion resistance of magnesium becomes destructively bad.Manganese has no effect on the corrosion resistance of the I. F. M., while the corrosion limit of iron contents ascends from 0.0014% to 0.0027%, when manganese is 0.2%.Aluminium and zink also has no effect, unless its content is less than 4% respectively.Natrium content does not deteriorate the property.Variation of recrystallization temperature of high purity magnesium depends on the iron content, namely that of Fe 0.001% is 100-125°C, of Fe 0.0014-0.0054% is 125-150°C and of Fe 0.0085% is 150-175°C.
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