Improved Laboratory Technique for Investigating Corrosion by Recirculating Cooling Water

Abstract

Abstract A description of an improved testing loop for the evaluation of cooling water corrosion inhibitors for open recirculating systems is given, together with the performance characteristics of the laboratory apparatus. The test equipment included heat transfer surfaces and permitted velocities of 2 to 3 feet per second. Corrosion rate comparisons are made with data previously obtained in a screening test loop operated under less severe test conditions. Attempts are made to detect the extent of scale build-up on heat transfer surfaces through losses in heat transfer and increased friction losses in the system. Results indicate that scaling and fouling characteristics of inhibited open cooling water systems were not satisfactorily measured in the apparatus described.