AFCO 9004 is designed for use as a corrosion and scale inhibitor in recirculating cooling systems. AFCO 9004 is a blend of corrosion and scale inhibitors, crystal modifiers, and dispersants. This blend of anodic and cathodic corrosion inhibitors has the ability to protect steel and copper metal from corrosion. Dispersants are added to protect the heat transfer surfaces from mineral scale deposits and to ensure optimum heat transfer. It is especially effective in corrosive waters with little or no hardness and is not adversely affected by the use of oxidizing biocides. This formula contains an inert fluorescent dye tracing ingredient for accurate control/monitoring.