TR-330 (AFCO 9597) is a nitrite-borax corrosion inhibitor in convenient liquid form. It is intended for use in closed recirculating water systems and will afford maximum protection to both ferrous and copper alloys. AFCO 9597 contains a both a corrosion inhibitor for ferrous metals and one for copper and copper alloys. It does not contain any chromate or phosphate additives and will not harm mechanical seals at any concentration level.