Abstract
Corrosion of metallic structural materials at elevated temperatures in complex gas environments of coal gasification is a potential problem. The use of appropriate corrosion-resistant coatings on metallic components offers an avenue to minimize material degradation and extend component life. The purpose of this paper is to review the current status on development and performance coatings in environments typical of coal gasification systems. The paper discusses the complexity of gasification environments, coating requirements for acceptable performance, coating methods, and corrosion performance of several of the coatings. Examples illustrate the morphology and corrosion performance of coating/structural alloy combinations exposed in simulated gasification environments and the results are used to identify promising coatings for application in gasification systems.
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