How to Eliminate Plating Bath "Burn."
We’ve all seen it. That crispy, flaky, nodular, usually dark deposit on the high current density extremes (edges, etc.). Usually, turning down the current is the reaction done immediately to try and remedy the problem. But exactly why does burning occur? An understanding of the mechanisms involved with the formation of a burn can better help a plater to avoid this nasty problem.

Going back to high school chemistry (if you can remember that far back), you may have seen demonstrated the two electrodes from a battery, generator, or rectifier placed in a beaker of water. You will see gassing at both electrodes. If you collect the bubbles, separate them for the anode (positive) and cathode (negative), you will note that twice as much volume of gas comes off the cathode. This is hydrogen gas. The gas collected from the anode is oxygen. These are, of course, the constituents of water is H2O.

Back to Basics: Spray Rinsing
In metal finishing, every process step and control parameter is critical. Although most process steps are scrutinized, tracked, and analyzed, quite often rinsing may be overlooked.

The critical nature of rinsing can be measured in many ways such as component quality, process solution contamination, or overall line process quality. The metrics may vary from application to application. Naturally, the more critical the component being finished, the more important the rinsing aspect becomes.

Conventional wisdom says simply use as much water as possible. However, due to the high level of regulatory pressure and discharge restrictions, it is not allowed nor is it practical or economical. Therefore, it is important to optimize the process rinses and rinse flow while conserving water and reducing regulatory pressures.

The following outlines some simple suggestions to improve process rinsing while reducing water consumption. Read more.
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