Stainless steels for wet conditions in municipal incineration and combustion plants
The main objectives of the project were to characterise the corrosion environment in wet cleaning systems in waste incineration plants and to define application ranges of stainless steels in these environments. This was performed by coverage of service experiences of the systems, by corrosion testing in plants and by laboratory testing using synthetic environments. Plant-exposures of test rigs in condensate or wash liquor were performed at five locations; three in Sweden, one in Germany and one in France. Creviced specimens of 11 alloys were used in each rig. In a number of experiments the dew point conditions were examined in three plants using different waste-fuel. A large number of condensate samples were extracted from flue gas at various temperatures in these plants. Analyses showed that the main corrosive constituent was HCI. The results were used for comparison with available flue gas data and for production of synthetic condensates to be used at laboratory testing. Cooled tubes were tested for condensation and appeared to be useful. In the laboratory testing, all materials were subject to screening by a critical pitting temperature (CPT) test according to ASTM G-150. Electrochemical tests in synthetic condensates were performed by means of anodic polarisation curves for non-creviced specimens. The condensates were based on analyses of condensates from plants. In addition, exposures of creviced specimens in racks were exposed in three synthetic condensates. Laboratory condensation was performed in two different devices. At the evaluation of the corrosion environments in the incineration plants, the corrosivity could be grouped into six classes. The materials were ranked according to their performance at exposure in the wet cleaning systems and in the laboratory tests.
Bibliographic Reference: EUR 22082 EN (2006), 163 pp. Euro: 25
Availability: Katalogue Number: KI-NA-22082-EN-S The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
ISBN: ISBN: 92-79-02084-6
Record Number: 200719324 / Last updated on: 2007-07-10
Original language: en
Available languages: en