镁合金在碳酸饮料中的降解与人体补镁初探

提出了通过镁产品在饮用水中的镁离子释放作为人体补镁手段的新思路,分析了镁及其合金在碳酸饮料中的降解机理、溶液镁离子浓度和pH值变化规律,探讨了镁合金产品作为人体补镁来源的可行性。结果表明,Mg的降解速度最快,AZ31次之,AZ91最低,表面均形成了抑制降解的(Ca,Mg)CO3腐蚀层;铝元素可有效降低镁的释放速度和碳酸饮料的pH值增幅;3种镁合金在容量为600 mL的碳酸饮料中浸泡2～4 h所释放的镁离子基本能满足每日人体所需补镁量,此时pH值变化较小,对碳酸饮料的品质无明显影响。

Degradation of Magnesium Alloy in the Carbonated Drinks and Research of Body Magnesium Supplementation

The paper presented a new idea for body magnesium supplementation by magnesium ion release of magnesium products in drinking waters, analysised the degradation mechanism of magnesium and its alloys in the carbonated drinks, the magnesium ion concentration of solution and pH variation, and explored the feasibility of a magnesium alloy products as human sources of magnesium supplementation. The results show that Mg degradation is the fastest, AZ31 is followed, AZ91 is lowest. Surface corrosion layer of (Ca, Mg)CO3 is formed to inhibit the degradation; aluminum elements can effectively reduce the release rate of magnesium and the increament of pH value in carbonated beverages; the Mg ions released from the three magnesium alloy soaked in 600 mL of carbonated drinks for 2 ~ 4 h basically satisfy daily requirements of magnesium supplementation content, the change in small pH has, no significant effect on the quality of the carbonated drinks.