Improved Marine Boiler Reliability Phase II. Volume VII: Superheater Corrosion Rates 1000-1050 Degrees F Outlet Steam Temperature

摘要

This report presents the corrosion potential of commercialy utilized superheater materials in a modern marine boiler under shipboard operating conditions at elevated temperatures. A comparison of wastage potential of several superheater materials over the selected temperature range was accomplished by the use of controlled temperature probes. Effect of exposure duration was determined by comparison of two identical probes removed from service at different time intervals. Several coatings were evaluated in this marine application. Physical measurements and chemical analysis of deposits and metallurgical techniques were used to develop the results generated by these probes. This information is intended for use in establishing safe operating temperatures for selected materials of fabrication.