Summary for black traces on electropolished parts Discussion
Black traces on electropolished parts at the jig holding area are the main complaint in this thread, along with an uneven finish at that contact point. Jagadeesan Sankaran says the problem may be caused by contamination in the electropolishing solution and recommends trying a fresh bath. Kishore Phadnis offers a different practical idea: move the rack during processing or change the contact position halfway through the cycle so the same area is not continuously exposed. The discussion does not identify a single confirmed root cause, but it points to two likely remedies: check bath condition first, then review jigging/contact strategy if the marks persist. Together, the replies suggest the defect is tied either to solution quality or to how the part is held during electropolishing.
Q. In electropolishing,black traces are present at the jig holding area of the metal and polish is not perfect at that area. I can’t able to do perfect finish. Can anyone help me resolve the issue.
Jagadeesan Sankaran
– Chennai, Tamilnadu, India
December 21, 2011
Most probably, your electropolishing solution is contaminated.
Try replacing it with a fresh one.
Kishore Phadnis
– Mumbai, Maha. India
January 18, 2012
You could try one of 2 things: put movement on the rack or change the position of the contact area half way through the process
Alan Tobin
– Ireland
January 31, 2012