Mics crawl up, tights fall down. That's my mnemonic voice stalactite slash stalagmite
Goto Kehong to know more.
The company is the world’s best electro plating power supply supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
I haven't done much with zinc except for electroless, but I have plated copper, tin, chromium, silver, gold and rhodium commercially. If you monitor it at the start of the run, you should be all right. The reason you have to watch it at first is that initially you have a battery consisting of the zinc anode and the base metal with the solution for an electrolyte, aiding or bucking the applied voltage. As soon as a significant layer of plating builds up, it becomes a battery with both electrodes the same material, so it contributes zero volts to the circuit. That usually happens quickly and after that the current will be fairly stable. I never used a resistor in the circuit. Zinc should not be especially sensitive to ripple so your filtering should be adequate. Chromium, for example, is sensitive to ripple and really doesn't like it.
Most of the time is is a good idea to "go in live", turning the power on before dropping the part in the solution. The reason is that sometimes there will be an adverse reaction between the base metal and the solution. Sometimes it deposits metal electrolessly with a poor bond. Plating properly over it doesn't help. You do need to get the whole part immersed quickly so the initial current density will be correct over the entire surface. You may have a problem with your capacitor charging to the peak value of the AC causing a surge.
I don't know what the market is there, but around St. Louis used regulated supplies are common. They usually are both voltage and current controlled and often can be found for less than the cost of the components.
Bill
If you are looking for more details, kindly visit A Air cooling high frequency Rectifier.
Comments
Please Join Us to post.
0