A Research Study on Internal Corrosion of High-Pressure Boilers—Final Report

The following report is the last in a series of four describing the progress and results of “A Research Study on Internal Corrosion of High Pressure Boilers.” The first three reports described the background, scope, and organization of the program, as well as the test facility and the results of Phases I, II, and III. This final report includes results of the eight Phase IV tests and a discussion of the results and conclusions from the entire program. Phase IV test results include data and observations on plug-type corrosion and hydrogen damage. The discussion of results describes the mechanisms involved in these types of attack, as well as the causes of caustic gouging. Observations on chemical hideout and deposition are discussed in addition to the heat transfer and fluid flow phenomena involved in nucleate boiling and departure from nucleate boiling.