Anticorrosion Scheme for Concrete Chimney in Flue Gas Desulphurization System

The corrosion behavior of bare common concrete, bare ceramsite concrete and test blocks with modified epoxy liner anticorrosion coating was studied in concrete chimney of flue gas desulphurization systems. Blister of the coating and other obvious changes did not appear on the epoxy liners after 6 months test. No any corrosion indication happened to the rebar in concrete block with epoxy liner anticorrosion coating, indicating a good protection to the rebar in concrete block. After 6 months test, the chlorine element in concrete block with epoxy liners was not found by the analysis result of energy dispersive spectrometer, and the content of sulfur did not increase compared with the untested concrete block. The results showed that the epoxy liner anticorrosion coating could prevent the permeation of harmful corrosives and provide the concrete block with very good protection. The results of engineering application experiment also proved the very good protection of epoxy liner anticorrosion scheme for concrete chimney in flue gas desulphurization systems.