Metal Finishing Guide Book


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components. The secret here is a consistent current density ramp with guaranteed repeatability. Real Time Graphic Observation : It cannot be overemphasized how important real-time graphic data loggers (see Figures 3 & 4) are for improving quality, efficiency (reduced time) and energy savings (reduced KWH). The operator can immediately see any problem that might occur during the process run. There is a permanent record for future evaluation along with a means for continued improvement on the next process run. No load should be run without at least a portable unit Figures 3 & 4. Sonabuoy Oceanographic Tubes-PSR 6061 Alloy (1.5-2.0 on line. They are Mils) -52Min without APCD vs. Sonabuoy Oceanographic Tubes APCD inexpensive and the 6061 Alloy (1.5-2.0Mils) 40Min. pay-off is fast with assured results. The key secret here is to find a person who really wants to learn anodizing, train him/her properly and give him/her a personal computer so he/she can access all of his/her production runs. This person will make and save you money! Current/Voltage Spikes and Deviations/CSD Discovery Leading to APCD: Capacitance shunt discharge (CSD) was first used to neutralize current and/or voltage spikes. This eventually led to the development of anodic pulse capacitance discharge (APCD) which is very unique. Please refer to the data logger graph, which illustrates it in operation, as more current is developed with no increase in voltage. Current and Voltage Spikes and/or Deviations can cause serious procedural problems and must be evaluated by good anodize training, experience, and technology. For example — A current increase during a ramp dwell period could be a potential burn. Voltage Spikes could be a malfunction in the power supply due to SCR Radical Misfiring. A definite ADO during a dwell 228

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