Design and study of polyureas anticorrosion coating in desulfurization flue

Abstract

Anticorrosion coating in desulphurization flue of one wet flue gas desulfurization equipment (FGD) (product model: DTTW-III-150) was designed and studied according to corrosive environment and technical parameters of a coal-fired power plant. And relevant design requirements were confirmed. Application results showed that polyureas can be used to anticorrosion in flue desulfurization equipment for anticorrosion because of their wear and high temperature physical properties. When the construction thickness was 2.0 mm, the high-temperature polyureas protective coating appearance smooth, EDM(electric discharge machining) 100% pass rate, adhesion 10.8 MPa, at 180 °C environment still had outstanding performance, that make sure it could reach its design life of the flue based on estimating the corrosion margin.