Metal Finishing Guide Book


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Figure 3: Air-agitated jiggle cell. ized procedure. Care should be taken to ensure that the cathode panel is not contaminated from fingerprints or handling marks, poor cleaning, or poor activation. The test cell will need to be rinsed out after each test. It is recommended to have jiggle cells devoted to each type of plating solution to prevent cross contamination from different solution types. Unique anodes and anodes bags should also be used on different solution types. An example would be semibright sulfur-free nickel and bright nickel plating solutions. The plating tests are normally run on the solution from the plating bath and then evaluated. The solution chemistry or operating conditions are then changed and another plating test is performed. The two panels should then be compared to determine if there is any improvement. SPECIALIZED TESTS It is common practice to use the jiggle cell for testing the ductility of nickel deposits. Users will use an unbent jiggle cell cathode and cut or shear off Figure 4: Jiggle cell anodes. the bottom of the panel to reduce the surface area (and subsequent solution additive depletion). This is commonly used for semibright and bright nickel ductility evaluations. CONCLUSIONS The jiggle cell is the single piece of test equipment that represents the actual plating conditions in the plating tank. It is especially useful for under shelf and shelf area troubleshooting. PART III TESTING METHODS FOR ELECTROPLATING BATHS The hull cell and jiggle cell are the two most widely used test equipment paraphernalia for electroplaters and electroplating addition agent suppliers. The interpretation of these test results is important. The operator must make a judgment based on previous tests on known acceptable plating solutions. 527

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