I have a few stainless steel tubes with a thin layer (30 um) of copper plating on the ID, for use in our accelerator project. I worked with a colleague to process and inspect some samples from these tubes to measure the finished surface roughness. When I received the samples I realized they had been cut by wire EDM, which I worry has affected the plating integrity. We viewed a few samples in our SEM and noticed a lot of pitting in the copper layer, which is atypical compared to previous projects. Does anyone have experience using wire EDM on plated surfaces, and does it indeed affect the plating integrity?
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