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Structure of coatings and rubber linings exposed to operating stress in flue gas scrubbing systems
Author(s) -
Willmes O.
Publication year - 1992
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19920430611
Subject(s) - chloroprene , materials science , natural rubber , composite material , flue gas , scanning electron microscope , coating , vulcanization , polyester , data scrubbing , waste management , engineering
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 m 2 steel surface are lined with a soft rubberized coating based on chloroprene base, butyl rubber/chloroprene and butyl rubber. The 110 000 m 2 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.