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由于镁合金重量轻、比强度大(强度与重量之比),并且能够吸收撞击或振动能量,不仅在航空、核能工业,而且在汽车,仪表、电子,以及森林采伐机械等领域中,越来越得到普遍的应用.特别是铸造工艺的发展,采用高压铸造的方法生产镁合金铸件已应用于生产.这就给表面处理工作者提出了新的课题. 通常在镁合金压铸件生产过程中,铸件表面会形成一种较坚实的、淡灰色的自然氧化膜,其主要成份为氧化镁的水合物和碳酸盐,它们虽然也具有一定的防腐蚀性能,但是由于镁的标准电位为-2.37,比其它金属的电位都低,这就决定了它在同其它金属零件相联接、表面污染以及
Due to its light weight, high specific strength (weight to weight ratio), and ability to absorb impact or vibrational energy, magnesium alloys are not only used in the aerospace, nuclear energy industries but also in the fields of automobiles, meters, electronics, and forest harvesting machinery The more widespread the application.Especially the development of the casting process, the use of high-pressure casting method of producing magnesium alloy castings have been used in the production.This gives the surface treatment workers a new topic.Usually in the magnesium alloy die-casting production process, Casting the surface will form a solid, light gray natural oxide film, which is mainly composed of magnesium oxide hydrate and carbonate, although they also have some anti-corrosion properties, but the standard potential of magnesium -2.37 , Lower than the potential of other metals, which determines it is connected with other metal parts, surface contamination and