Free Acid Control in Ferric Chloride Solutions Using pH Measurem

Spring 1996

Free Acid Control in Ferric Chloride Solutions Using pH Measurement

Ferric chloride is widely used as an ctehant for different types of metals and alloys. During the process the ferric ions are reduced to ferrous ions and etching is retarded. For this reason the contaminated etehant has to be discarded. very frequentiy , which is a costly affair.

Dr. Hans Korsee, Stork Veco BV