Abstract
The flue gas desulphurization plants in the brown coalpower stations of RWE Energie AG operate in accordance with the limestone process. 37 scrubbers with a total of 210 000 m2 steel surface are lined with a soft rubberized coating based on chloroprene base, butyl rubber/chloroprene and butyl rubber. The 110 000 m2 surface of the outlet ducts is coated with synthetic resin materials based on polyester/glass flake and vinylester/glass flake spray-coatings. This paper reports on the erroneous modifications which have already occurred during a short operating period. With metallographic methods combined with light-optical and scanning electron microscopy (SEM) as well as X-ray diffraction analysis the structure of the material in the as-received condition is characterized and compared with the changes resulting from the stress due to the exposure during operation.
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