A green process with many benefits
High temperature acid pickling is widely used to condition titanium, either as a final surface cleaning or to address smeared metal deposits from grinding or machining. The acids used (HF-HNO3) are a constant source of safety concerns and expense in manufacture, handling, delivery, use and disposal. Permits are often difficult to obtain and facilities that use dangerous acids are not welcomed by many communities.
The MetCon process is truly a green process: Chemical and hazardous waste dangers are essentially eliminated; there is no strong acid to handle and no spent acid haul-off. The elimination of HF-HNO3 pickling baths eliminates cost and allows titanium processing to become a much better neighbor (see adjacent letter).
The Metcon electrochemical weak acid electrolyte is easily neutralized in-house prior to public sewer disposal in compliance with all state and federal environmental requirements. The MetCon plant exhibits none of the corrosion typical in strong acid pickling operations, and none of the explosive and highly combustible dust, fines, turnings and grime associated with titanium grinding and machining facilities.