APPLICATIONS OF COATINGS IN COAL-FIRED ENERGY-SYSTEMS

[摘要] Corrosion and erosion of metallic structural materials at elevated temperatures in complex multicomponent gas environments that include particulates are potential problems in many fossil energy systems, especially those using coal as a feedstock. The use of appropriate corrosion-resistant coatings on metallic components offers an avenue to minimize material degradation and to extend component life. The purpose of this paper is to review the current status of coating performance in environments typical of pulverized-coal-fired boilers, coal gasification, fluidized-bed combustion, and gas turbines. The complexity of environments in different systems and the coating requirements for acceptable performance are discussed. Examples illustrate the morphology and corrosion-erosion performance of coating-structural alloy combinations exposed in some of these systems. In addition, future research and development needs are discussed for coating applications in several coal-fired systems.

[发布日期] 1993-03-10