Hanging on the quality of electroplating is very big, but often the most easy to be ignored.
Some simple large parts, make a hook to hook the product, to the slot on the cathode bar hang, you can electroplate.
Even so, red-hot is common if the hook is not conductive enough. A lot of electroplating factory hanging tools are in the work of hot hands, people are accustomed to think that electroplating is like this, is a big mistake.
The lack of cross section makes the resistance of a kind of conductor increase and the reactive power consumption increase. The current on the ammeter is very large, but the current distributed on the parts is insufficient, making the distribution of secondary current uneven, the quality of electroplating can not be guaranteed.
At the same time, the temperature of the bath increases rapidly and the voltage of the bath increases, which brings about various problems.
Therefore, reasonable use of the leading electric bar, to not hot hands as the principle.
The electric cross section should be calculated according to the total current intensity of the plating bath and the number of racks, and each rack should be allocated reasonably.
Generally, the upper part of the hanger is at least 5cm from the liquid level, and the lower part is 10 ~ 15cm from the bottom of the tank. When there are stirring holes and heating pipes at the bottom of the tank, the value should be increased or the upper limit should be set.
Manually operated harnesses should take into account the weight per hanger, not exceeding 10kg.
Had better be double hook frame type to hang provide, the hang of automatic line is in when artificial fluctuation, sheet is hanged also cannot overweight. In addition, all the hanging tools should be used to insulate the non-direct conductive parts and apply the hanging tools glue.
The method of wrapping with adhesive tape is not good.