Inventors:
Thomas J. Butler - Monroeville PA
Robert M. Hudson - Churchill PA
Clair J. Warning - Plum PA
Assignee:
United States Steel Corporation - Pittsburgh PA
International Classification:
B01D 1302
Abstract:
Fluoboric acid is used to pickle steel, particularly hot rolled steel, in either a continuous strip or batch operation. The spent acid is recycled after treatment by electrolysis using compartmented cells separated by a membrane.