Materials being considered for use in, or to contain, aqueous media in high-pressure steam plants or water-cooled nuclear reactor plant systems require a measure of their rate of general corrosion under the anticipated environmental conditions. Pilot plant data are usually obtained by exposing test materials to simulated environmental conditions for various lengths of time. The general methods used for tests may be similar, but techniques and procedures usually vary widely. The lack of standardized test methods for high-temperature water corrosion testing results in data that are not always comparable or that are of limited use because of differences in testing techniques, methods of analysis, or deficiencies in the reporting of results.

This lack of uniformity in corrosion testing prompted NACE Unit Committee T-7D on High Purity and Power Plant Water to make this standard test method available to increase the utility and reliability of high-temperature aqueous corrosion data. The standard is also intended to aid users of such data by indicating how the data were obtained and the possible limitations for application to selection of materials or environmental conditions for high-temperature water systems.

The method described herein is intended primarily for the evaluation of metals used for structural components and for containment of aqueous solutions. Paragraph 1.7 lists limitations of this standard.

This standard was originally published in 1974 by NACE Unit Committee T-7D on High Purity and Power Plant Water and its Task Group T-7D-14. Before completion of that document, Unit Committee T-7D was designated as Unit Committee T-11A on High Purity and Power Plant Water under NACE Group Committee T-11 on Thermal Power Generating Corrosion. This standard was revised in 1995 by NACE Unit Committee T-7H on Corrosion and Its Control in Steam-Generating Systems. It is issued by NACE International under the auspices of Group Committee T-7 on Corrosion by Waters.

This standard describes a pilot plant method for determining the extent and rate of corrosion of metals in circulating high-temperature water at temperatures greater than 100°c (212°F) but less than approximately 360°C (680°F).

 Historical Document 1995