ABSTRACT
Some researchers are interested in the development of pure Magnesium (Mg) as a biomedical material, and pure Mg is regarded as the best choice for the fundamental learning about interactions between Mg and the physiological environment. This chapter introduces impurities and their effects on the corrosion of Mg, and focuses on pure Mg with different degrees of purity as biomaterials. The poor corrosion resistance of Mg is a result of the high intrinsic corrosion tendency of Mg, and as for Mg alloys with second phases or pure Mg with impurities, microgalvanic corrosion can accelerate the corrosion. Mg has many advantages as a hydrogen storage material in terms of hydrogen storage capacity and cost. Different impurities have different influences or different severities on the corrosion resistance of Mg, and some elements have been found to be extremely detrimental to the corrosion performance of Mg.
