Corrosion Inhibitor for Open Water Recirculating Systems is a organic chlorine stable , non volatile liquid corrosion inhibitor and scale dispersant, which has been designed for use in conjunction with biocide treatments, used for control of bacteria and is an alkaline blend of organic , anodic and cathodic corrosion inhibitor, a threshold deposit controller and sludge conditioner offering protection to multi metal system without the requirement of additional specific corrosion inhibitor. The Corrosion Inhibitor contains no controversial constituents such as heavy metals or phosphates whose use is becoming increasingly restricted and offers protection over an extended range of ph, temperature and raw water hardness, making an ideal treatment for both building services and industrial application. The Corrosion Inhibitor should be dosed at 50 to 200 ml/ m3 for maximum control it should be dosed continuously. The Corrosion Inhibitor for Open Water Recirculating Systems is a brown liquid has 1.11 approx density, no flash point and is non volatile type in nature.