在铝板的工厂或应用过程中，有时会有上面出现黑点的情况，对这种情况是怎么回事?铝板生产厂家带我们来分析一下。一是铝板的材料。铝板厂家生产的铝板上盖为0.5mm厚LF21铝板。该模型的铝板具有多种相同的材料，相似的形状，相同的零件加工过程，以及相同的加工周期，形状相似的零件没有这样的缺陷。而这并不是原材料的缺陷和造成的故障。所以在加工过程中，盖镀银的一般工艺路线是:机床加件─预处理─电镀锌─电镀铜─电镀银─涂料─浸镀823─贮存。
　　In the process of aluminum plate factory or application, sometimes there are black spots on it. What's the matter? The aluminum plate manufacturer will take us to analyze. One is the material of aluminum plate. The top cover of aluminum plate produced by aluminum plate manufacturer is LF21 aluminum plate with thickness of 0.5mm. The aluminum plate of the model has many kinds of the same materials, similar shapes, the same part processing process, and the same processing cycle. The parts with similar shapes have no such defects. This is not the defect of raw materials and the failure caused. Therefore, in the process of processing, the general process of silver plating on the cover is: machine tool add-on-pretreatment-electro-galvanizing-electro-copper-electro-silvering-coating-dip-823-storage.

　　在电镀铝板的过程中，可能是电镀的某些生产环节发生了变化，导致失败。但同时加工的类似零件在生产条件没有改变的情况下，并没有出现这样的故障。因此，不包括电镀生产条件的变化。根据以往的生产经验，镀银变色更常见的原因是硫元素对镀银层的影响。
　　In the process of electroplating aluminum plate, first of all, some production links of electroplating may have changed, leading to failure. However, the similar parts processed at the same time did not have such failures when the production conditions did not change. Therefore, the change of electroplating production conditions is not included. According to previous production experience, the most common reason for discoloration of silver plating is the influence of sulfur element on silver plating layer.
　　在过去，发生镀银后的零件没有及时包装和密封保存，长时间在电镀车间和导致镀银层发黄。但故障件镀银后及时包装并储存在干燥的容器中，不受车间空气气氛的影响。在喷漆过程中，发现在封面喷漆过程中，已经有了一批维修记录。更主要的原因是缝隙未被堵塞，让漆雾进入，并附着在银色涂层的表面而无法去除。为防止此类故障的发生，加工时建议用3M胶带封好缝隙，防止油漆雾进入。
　　In the past, the parts after silver plating were not packed and sealed in time, which resulted in yellow plating layer in electroplating workshop for a long time. However, the defective parts shall be timely packed and stored in dry containers after silver plating, which shall not be affected by the air atmosphere in the workshop. In the process of painting, it is found that a batch of maintenance records have been made in the process of painting the cover. The main reason is that the gap is not blocked, allowing the paint mist to enter and adhere to the surface of the silver coating. In order to prevent this kind of failure, it is recommended to seal the gap with 3M tape during processing to prevent paint mist from entering.
　　通过这种消除方法，我们找到了问题的根本原因，我们立即采取措施消除隐患，使铝板表面光亮如新，出厂率大大提高。http://www.jndclyyxgs.com
　　Through this elimination method, we found the root cause of the problem, and we immediately took measures to eliminate the hidden dangers, so that the aluminum plate surface is bright as new, and the delivery rate is greatly increased. http://www.jndclyyxgs.com