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
