In the production of electroplated decorative chrome, a set of chrome layer hair is often encountered, and the chrome plating layer is gray and has no metallic luster, and the surface of the nickel plating layer after the chrome plating is removed is normal. The main reasons for this failure are:
1 The bright nickel layer itself has poor chromium content, and the bright nickel plating additive has an effect on the chromium plating of the nickel plating layer. If the nickel plating bright additive has poor cleaning property, the residual additive on the surface of the part will not be cleaned, and the part is covered with chromium after chrome. 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 is added, 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, the nickel activation process is activated to activate the nickel plating layer, and the activation can be chemically activated and electrochemically activated.
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.
1 The bright nickel layer itself has poor chromium content, and the bright nickel plating additive has an effect on the chromium plating of the nickel plating layer. If the nickel plating bright additive has poor cleaning property, the residual additive on the surface of the part will not be cleaned, and the part is covered with chromium after chrome. 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 is added, 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, the nickel activation process is activated to activate the nickel plating layer, and the activation can be chemically activated and electrochemically activated.
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.
A manual pulse generator (MPG) is a device normally associated with computer numerically controlled machinery or other devices involved in positioning. It usually consists of a rotating knob that generates electrical pulses that are sent to an equipment controller. The controller will then move the piece of equipment a predetermined distance for each pulse.
The CNC handheld controller MPG Pendant with x1, x10, x100 selectable. It is equipped with our popular machined MPG unit, 4,5,6 axis and scale selector, emergency stop and reset button.
Manual Pulse Generator,Handwheel MPG CNC,Electric Pulse Generator,Signal Pulse Generator
Jilin Lander Intelligent Technology Co., Ltd , https://www.jllandertech.com