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Need to know viscosity of Nickel Sulfamate


Viscosity Tester

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Q. Dear Readers,

I am using electroforming to manufacture high performance optical reflectors (i.e. surface accuracy, uniformity, and surface finish). I am in the process of designing a new production tank capable of manufacture in large quantities. It has been seen that flow rate from spargers has a direct effect on stress within the part. For this reason I am designing a sparger manifold which will deliver the same flow rate through the sparger pipe. There are sixteen cells in this tank with thirty two sparger holes (two per cell). In order to calculate and design a suitable manifold I need the viscosity of nickel sulfamate. My process is outlined as follows:

Fluid: Nickel Sulfamate
Concentration: 180 g/L
Operating Temperature: 60 °CC
Specific Gravity: 1.32
Surface Tension: 30 dyn/cm

Any help would be greatly appreciated. Even data at a different operating temperature would be helpful.

Christopher Jensen
laboratories - Bohemia, New York

A. There is no way to calculate it. It has to be measured. I would use an Ostwald viscometer. This is a piece of glassware that looks kind of like a bent pipette. The fluid is drawn up to the first of two marks on the viscometer, it is immersed in a constant temperature bath, and the fluid allowed to drain to the lower mark. The time that this takes is measured, and then the viscosity may be calculated. One costs about $100. Most big lab supply places will sell them.

dave wichern
Dave Wichern
Consultant - The Bronx, New York

adv.   nickel how-to book

"The Sulfamate Nickel How-To Guide"

by David Crotty, PhD
& Robert Probert

published Oct. 2018
$89 plus shipping

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