We are having problems with anolyte for a electrocoating application. The colour of the anolyte (acetic acid) has changed from a normal pale yellow to a dark red/black colour. It is suspected that the 316 stainless steel anodes may be "dissolving" as high concentrations of Cr, Ni and Mo are found in the anolyte solution. A change of voltage has been tested through the anodes recently, could this be the source of the problem? Any other theories on the topic?
