Specification for brine pinhole test for enamelled wire
Operation steps
1.Prepare copper wire or wound armature samples according to the requirements
2. Connect the power supply, switch on the power, adjusting DC voltage meter adjustment knob, the voltage value is 12V.
3. Copper wire or wound sample was immersed in 0.2% of the concentration of salt solution (main ingredients are water, salt, pure alcohol, phenolphthalein, 3%)
In the sample, the negative electrode connected with DC power supply, DC power connected with the positive solution.
4.Within a minute, observe the change of the sample, if the sample has no obvious change, indicating that the sample without pinhole, if the red and the penetrating phenomenon around the sample you need to pay attention to, at this time, explain the pinhole, carefully count, there is the phenomenon of a few, there are a few pinholes.
5.After the experiment, turn off the power and take out the sample
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