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镁合金具有密度小(仅为Al的2/3和Fe的1/4)、热导率高、尺寸稳定、电磁屏蔽性良好等优点,广泛应用于电子产品、汽车工业以及航空航天等领域,.但镁合金化学性质非常活泼,在空气中易氧化,易被海水、土壤、潮湿的空气等介质腐蚀,耐蚀性能差,其应用范围受到限制.提高镁合金耐蚀性主要有两种途径:一是通过添加某些合金元素,减少有害杂质含量,采用适当的热处理工艺改善镁合金组织;二是采
Magnesium alloy has many advantages such as low density (only 2/3 of Al and 1/4 of Fe), high thermal conductivity, stable size and good electromagnetic shielding. It is widely used in the fields of electronics, automobile industry and aerospace, However, the chemical properties of magnesium alloy is very lively, easily oxidized in the air and easily corroded by media such as seawater, soil and moist air, resulting in poor corrosion resistance and limited application scope. There are mainly two ways to improve the corrosion resistance of magnesium alloys : First, by adding some alloying elements, reducing the content of harmful impurities, the use of appropriate heat treatment process to improve the magnesium alloy; the second mining