Ray Post, P.E.
Track K | Renewable Energy & Sustainable Development
Phosphate based cooling water treatment programs emerged as the cooling water technology of choice when chromate and zinc based corrosion inhibitors were phased out some 35 years ago.At the time, the industry was certainly aware of the many troublesome issues associated with phosphorus treatment, particularly the difficulty of precisely controlling the program to avoid forming deposits in hot heat exchangers. Phosphate-based chemistries also promote algae growth on cooling towers, resulting in creased chlorine and biocide usage in response.Environmental regulations are increasingly limiting phosphorous discharge due to its role as an aquatic nutrient in eutrophication.This paper describes the development and application of environmentally friendly corrosion inhibitors that exceed the performance of phosphate in terms of multi-metal corrosion protection, reduced fouling potential, passive film persistency, ability to passivate rusted surfaces, and performance in soft water.The results of electrochemical studies and industrial applications of these phosphate-free corrosion inhibitors will be presented.
No Spam - only latest news, program and activity updates!