Light metals ( aluminum and aluminum alloys , zinc and the like ) , on the other hand , are vigorously attacked by both acids and strong alkalis , so they require cleaning products that are only mildly alkaline , while acids must not be used at all 另一方面，酸和强碱都会剧烈腐蚀轻金属（铝和铝合金、锌等等） ，因此这类物品的清洁产品只能是弱碱性的，且绝不能用酸。
The economic success of alcan deutschland gmbh is coined / shaped by products and service services such as sheet metals , section sheets of aluminium , aluminium sheets in addition to sheet iron ware , metals and aluminium alloys . one can even receive offers on cold extruded parts , colour aluminium , light alloys and rolling products as well as on packing plates with alcan deutschland gmbh in outstanding quality Alcan deutschland gmbh是一家令客户满意的工业型企业，该企业生产杰出的铝薄板,铝型材,钢板、铁皮、镀锡薄板,白铁制品、板件、冲压件,色铝,金属,冷挤压构件,轻金属,轧材、轧制成品,铝合金。
Being fine , homogeneous and free of melting , the powder prepared by mechanical alloying has applied to develop scattering strengthen - material , magnetic material , high - temperature material , superconductivity material , amorphous , and non - equilibrium material , compound material etc . as a high - tech technology to prepare alloying powder , ma has become a more and more important method for preparing new materials 机械合金化法制备的粉末晶粒细小、成分均匀，且能避免熔化过程，已用于开发研制弥散强化材料、磁性材料、高温材料、超导材料、非晶、准晶、纳米晶等各种状态的非平衡材料、复合材料、轻金属高比强材料、储氢材料、过饱和固溶体等。作为制备合金粉末的非平衡高新技术，越来越成为一种制备新材料的重要方法。
( 3 ) the free - standing porous silicon films with continuous porous structure were prepared on single crystal silicon wafer by the method of anodic oxidation and electrochemical etching - electropolishing , and firstly used as the anode materials for lithium ion secondary batteries . the capacities of lithium ions storage and the process of charge and discharge of this nano - silicon anode materials as well as the influence of the structure of ps on behavior of storing lithium ions were inspected at length . on the other hand , through the process of charge and discharge in cells , the lithium of light metal element could be electrochemically doped into ps at different doping levels 胡劲松河北师死大学硕士学位论文（ 3 ）利用阳极氧化法在单晶硅基底上制备了多孔硅自支撑膜，并首次将这种具有连续多孔结构的硅材料用作了理离子电池的阳极材料，考察了这种纳米级硅阳极的储钾性能和充放电过程，分析了材料结构对其储理行为的影响；另一方面，利用这种电池充放电过程在多孔硅中电化学引入了不同点缀程度的轻金属钾元素，考察了钾点缀对多孔硅自身结构，及至性质所带来的影响，提供了一种通过电化学方法插入埋离子从而连续调整多孔硅发光性质的有效方法。
