Editing Electroplating (section)

===Hull cell===
[[Image:Hullcell.jpg|thumb|A zinc solution tested in a Hull cell]]
The [[Hull cell]] is a type of test cell used to semi-quantitatively check the condition of an electroplating bath. It measures useable current density range, optimization of additive concentration, recognition of impurity effects, and indication of macro throwing power capability.<ref>{{Cite book | title = Metal Finishing: Guidebook and Directory. Issue 98 | page = 588 | year = 1998 | volume = 95}}</ref> The Hull cell replicates the plating bath on a lab scale. It is filled with a sample of the plating solution and an appropriate anode which is connected to a [[rectifier]]. The "work" is replaced with a Hull cell test panel that will be plated to show the "health" of the bath.

The Hull cell is a trapezoidal container that holds 267 milliliters of a plating bath solution. This shape allows one to place the test panel on an angle to the anode. As a result, the deposit is plated at a range current densities along its length, which can be measured with a Hull cell ruler. The solution volume allows for a semi-quantitative measurement of additive concentration: 1&nbsp;gram addition to 267&nbsp;mL is equivalent to 0.5&nbsp;oz/gal in the plating tank.<ref>{{cite web|last=Kushner|first=Arthur S.|date=December 1, 2006|url=http://www.allbusiness.com/manufacturing/chemical-manufacturing-paint/3993213-1.html |url-status=dead |archive-url=https://web.archive.org/web/20100313093038/http://www.allbusiness.com/manufacturing/chemical-manufacturing-paint/3993213-1.html|archive-date=March 13, 2010 |title=Hull Cell 101 |website=Products Finishing}}</ref>