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At present, there are three significant problems in cyanide free silver plating process in China
① Plating function. At present, many cyanide free silver plating functions cannot meet the technical requirements, especially the engineering silver plating, which has more requirements than the decorative silver plating. For example, the coating crystal is not as smooth as cyanide; The purity of the coating is not enough, and the organic matter in the coating is mixed, resulting in high hardness and low conductivity; There are also problems such as deterioration of welding function. These are very sensitive for electronic electroplating. Some non cyanide silver plating can not be used for thick silver plating, let alone for high-speed electroplating, because of low current density and slow stacking speed.
②镀液稳定性。无氰镀银的镀液稳定性也是一个主要目标。许多无氰镀银镀液的稳定性都存在问题，无论是碱性镀液仍是酸性镀液或是中性镀液，不一样程度地存在镀液稳定性问题，这主要是替代氰化物的络合剂的络合才能不能与氰化物比较，使银离子在必定条件下会发生化学复原反响，积累到必定量就会呈现沉积，给管理和操作带来不方便，同时令本钱也有所增加。
③技术功能。技术功能不能满意电镀加工的需求。无氰镀银通常涣散才能差，阴极电流密度低，阳极简单钝化，使得在应用中遭到必定限制。
This article is from:http://www.newstar-china.com/
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