Electroplating Hull cell

Explain the basis for the operation of the Hull cell in other words, why it is expected that different points on a slanted cathode will be electroplated to different degrees. 

FIGURE 26.24 The classical Hull cell for electroplating. All dimensions are in mm. Figure from [94] (copyright Elsevier 1994). 

Laboratory processes available for electroplating control include conventional wet chemical analysis, advanced instrumental techniques, metaUographic cross-sectioning, and Hull cell. 

With an applied current of 2 A, the variation in cathode current density is from approximately 2,5 to 85mAcm which covers the working range of most electroplating baths. The Hull cell is also useful as an empirical development tool, e.g. for rapid screening tests on addition agents. The fundamental cell has been modified, for special purposes, in numerous ways. e.g. a bottomless cell may... 

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