Magnesium alloys can work as biomedical materials due to their Young's modules similar to that of bone. Nevertheless, in a human plasma, one of the major drawbacks of these materials is the low corrosion resistance. Here, AZ80 corrosion in the solutions containing chloride, bicarbonate, sulphate and hydrogen phosphate ions were investigated by a short-term immersion test and electrochemical techniques. The results showed that bicarbonate and hydrogen phosphate could retard corrosion rate, while chloride and sulphate accelerated corrosion rate. During the early immersion stage, the corrosion rate increased with the presence of bicarbonate. It was caused by the reaction of bicarbonate and hydroxide promoting the dissolution of magnesium and accelerating corrosion. In the later stage, the reduced corrosion rate was due to the formation of various protective films. The sample formed a new sparse porous MgSO₄·5H₂O compounds in the sulphate ion solution, which could not effectively prevent chloride ions from entering the matrix and thus accelerated the dissolution of magnesium. With the presence of hydrogen phosphate, magnesium phosphate with a much lower solubility was formed, preferentially precipitated on the surface and was not influenced by the chloride ions. The corrosion mechanisms of magnesium alloys in above ions were proposed.

镁合金的杨氏模量与骨骼相似，因此可以作为生物医学材料。然而，在人体血浆中，这些材料的主要缺点之一是低耐腐蚀性。在这里，通过短期浸没试验和电化学技术研究了含氯化物，碳酸氢根，硫酸根和磷酸氢根离子的溶液中AZ80的腐蚀。结果表明，碳酸氢盐和磷酸氢盐可以抑制腐蚀速率，而氯化物和硫酸盐可以加速腐蚀速率。在浸入初期，随着碳酸氢盐的存在，腐蚀速率增加。这是由于碳酸氢盐和氢氧化物的反应促进了镁的溶解并加速了腐蚀。在后期阶段 降低的腐蚀速率是由于形成了各种保护膜。样品形成了新的稀疏多孔MgSO硫酸根离子溶液中的₄ ·5H ₂ O化合物，不能有效防止氯离子进入基质，从而加速了镁的溶解。在存在磷酸氢盐的情况下，形成了溶解度低得多的磷酸镁，其优先沉淀在表面上并且不受氯离子的影响。提出了镁离子在上述离子中的腐蚀机理。