94-10: Pitting Corrosion of Cooling Water SystemsOperation of cooling water systems requires that availability of system components be optimized. Pitting corrosion of pumps, valves, heat exchangers, piping, etc. impacts this availability. Pitting due to crevices, microbiological activity, deposit is, materials selection, system operation and other variables is discussed. Prevention and control guidelines for pitting corrosion in cooling water systems based upon real system experience are presented.

Recent environmental concerns have been expressed regarding the possible toxicity effect to aquatic life from copper in once-through cooling water discharge and the blowdown from recirculating cooling systems

operating conditions and instrumentation are specified

This paper examines the wide range of materials currently available for components used in open and closed circuit cooling towers as well as evaporative condensers

Revised April 2021

Basic heat transfer theory and various calculations used to determine fouling rates are reviewed

The order of decreasing volatility is ozone > chloramines > hypochlorous acid

When a metal

and Chlorine Dioxide are very strong oxidants and as such are actively depleted by things like UV from sunlight

and a 5MW simple cycle gas turbine-generator at Ft

CTI’s ATC-128

This report provides the technical background

The steam from the turbine exhaust condenses as it is directly cooled by forced convection of the ambient air