Ni Plating thickness

Take a sample tube, measure volume of liquid before & after Ni plating. It will give you difference in the voume, you can convert that volume difference to get thickness (change in Inner Radius).

Thanks 4 replyin ..

But if someone is producing 2000 pcs/day how to ensure that the plating thickness will be within tolerance in every tube ?

Need a quick & effective method for the same .

All depends on the producers skills. He must maintain appropriate plating conditions. The simpliest and promissing method is direct measurement of so called "witnes"-a small parts of the same material which are plating together with tubes. Then using polishing and optical mike techniques one could obtain EXACT and DIRET information. Thank you.

vry easy, just cut a small part of a tube and cove at the same conditions, then make a polished microsection suitable for optic microscope measurements.

If someone is doing the plating for you, then they should be able to tell you the thickness. Are you doing the plating yourself? If you are, then Ni ion concentrations of the bath before and after the plating will give you the necessary info for calculating the thickness.

Mike

Using an inside micrometer measure the I.D. of the original tube, then measure the I.D. of the plated tube -- calculate the difference. Remember that this is a diameter so your measurements will reflect the thickness of the plating doubled. If .010" is your calculated I.D difference then the plating will be .005" thickness.