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MM: Fachverband Metall- und Materialphysik

MM 22: SYM Physics meets Industry

MM 22.6: Talk

Wednesday, March 28, 2007, 16:40–17:00, H16

High-temperature corrosion in waste incineration plants — •Barbara Waldmann, Bernhard Stöcker, Ferdinand Haider, and Siegfried Horn — Universität Augsburg

The corrosion of steels in heat exchangers of power plants is still not understood in all details. Especially in waste incineration plants the corrosion is a substantial technical and also economic problem. A corrosion probe was developed, which allowed to detect corrosion in real-time by performing potentiostatic analysis. The measurements were performed with three electrodes, two of which consisted of the steel (15Mo3) employed in the respective facility. Additionally the probe head was kept at the same temperature as the heat exchanger pipes to allow for a conclusion about the corrosion on the heat exchanger pipes in the facility. The measured corrosion rates agree well with those observed in the facility. In addition to these measurements, the influence of parameters like temperature, exhaust gas composition, or flow rate on the corrosion behaviour and the deposit composition were investigated by changing these parameters locally at the probe head.