â‘ bright nickel layer itself sets chromium poor, which bright nickel plating additives to the sleeve chromium nickel plating influence, if the cleaning is poor nickel gloss additive, can lead to parts of the surface remaining additives cleaning dirty, replacement sets Chromium after Layer hair.
2 The nickel plating layer is passivated before the ferrule is set. This is because the cleaning time after electroplating nickel is too long, resulting in passivation of the nickel plating surface.
The methods for dealing with such failures include: selecting a set of chrome-good photo-nickel additives; adding electroless matt nickel or impact nickel after bright nickel plating (no brightening agent is added to the nickel plating solution, and plating time is controlled without affecting bright nickel) The bright appearance can be), the matt nickel has excellent cleaning property and sleeve chrome due to no additives; after the bright nickel, the cleaning process is added to ensure cleanness; at the same time, the cleaning time is shortened to prevent the nickel layer from being passivated; before the chrome plating is added The nickel activation process activates the nickel coating, which can be activated by chemical activation and electrochemical activation.
In addition, it is noted that the residence time of each groove of the electroplating automatic line cannot be adjusted, which may result in a long residence time of the parts in the water after plating bright nickel, which causes the problem of the surface of the nickel plating passivation sleeve after chrome, and can be added to the sink with a long residence time of 0.59/ L ~ l9 / L of NaHC03 to avoid nickel surface passivation.
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