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Cell For Measuring The Surface Tension Of An Electroplating Solution

IP.com Disclosure Number: IPCOM000095400D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Judge, JS: AUTHOR [+2]

Abstract

A wetting agent is added to an electroplating solution to decrease the solution surface tension. The surface tension of the electroplating solution is proportional to the quantity of wetting agent added to it. This cell measures the surface tension and concentration of the wetting agent in an electroplating solution in a simple and fast manner.

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Cell For Measuring The Surface Tension Of An Electroplating Solution

A wetting agent is added to an electroplating solution to decrease the solution surface tension. The surface tension of the electroplating solution is proportional to the quantity of wetting agent added to it. This cell measures the surface tension and concentration of the wetting agent in an electroplating solution in a simple and fast manner.

The surface tension measuring cell consists of U-shaped glass tube 1 having reservoir portion 2 and surface tension measuring portion 3. Flat nickel disc 4 is connected as the anode of portion 3 by conductor 5 to the positive side of DC power supply 6. Tube 7, which is nickel plated either on its outside surface only or both on its outside and inside surfaces, is positioned about 0.750 inches above anode 4. Tube 7 is connected as the cathode to power supply 6 by conductor 8. Voltmeter 9 is connected across the cathode and anode of the cell.

The electroplating solution is added to tube 1 until portion 2 is about to overflow. This establishes the proper level in section 3. Cathode 7 is fixed in touching relationship to the solution in portion 3. The height of the meniscus of the solution on cathode 7 is proportional to the surface tension of the electroplating solution. The level of the meniscus is measured by an increase in potential at a constant current. This is because the area of cathode 7 immersed in the solution is dependent upon the concentration of...