This heavy-duty electrolyte solution is composed of phosphoric acid and other additives which makes it ideal for the most demanding weld cleaning applications. SURFOX-T is formulated for cleaning TIG, SPOT and PULSED MIG welds. Safe alternative to pickling paste and harsh acids. Free from hydrofluoric acid and nitric acid. Will remove light scaling. ASTM A967 (ASTM 380) certified for passivation. NSF registered for food plant applications. Formulated for the most demanding TIG, SPOT and PULSED MIG weld cleaning applications.