Hi
I have been conducting some test on dendrite growth on gold plated copper (with nickel barrier) printed circuit board pads. After applying a small quantity of water and biasing with 15v I observed a dendrite emanating from the cathode. From the literature I have read the dendrite grows from the cathode. Placing 15 volts directly on the pads with no current limiting caused large quantities of gas bubbles that damage the dendrites.
So, I placed a resistor in series 500K ohms.
However, this produced a dendrite from the anode. I have measure the polarity and it is correct. A search on the internet reviled a site that said batteries can produce
anode to cathode dendrites if overcharged.
Is this correct and if so how can dendrites for from on the anode surely metal ions (M+) migrate from the anode to the cathode.
In addition if the circuit is connected with the resistor (1M ohms) in series with the earth then dendrites grow from the anode.
15v+ - --- gold plated Cu pads --- =A6 1M ohm =A6 GNDHowever, if the resistor is in series with the +V supply then dendrites
grow from the Cathode??
15v+ - =A6 1M ohm =A6 --- gold plated Cu pads ---=20 =A6=20 GND=20Cheers=20
WayneL=20
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