Materials And Coatings To Resist High Temperature Corrosion

This book assesses the state of the art of coatings materials and processes for gas-turbine blades and vanes, determines potential applications of coatings in high-temperature environments, identifies needs for improved coatings in terms of performance enhancements, design considerations, and fabrication processes, assesses durability of advanced coating systems in expected service environments, and discusses the required inspection, repair, and maintenance methods. The promising areas for research and development of materials and processes for improved coating systems and the approaches to increased coating standardization are identified, with an emphasis on materials and processes with the potential for improved performance, quality, reproducibility, or manufacturing cost reduction.

" ... papers presented at the Fourth International Symposium on High Temperature Corrosion and Materials Chemistry, held at the 203rd meeting of the Electrochemical Society, Inc., in Paris, France, April 30- May 2, 2003"--Preface.

High temperature corrosion is a phenomenon that occurs in components that operate at very high temperatures, such as gas turbines, jet engines and industrial plants. Engineers are constantly striving to understand and prevent this type of corrosion. This book examines the latest developments in the understanding of high temperature corrosion processes and protective oxide scales and coatings. Part one looks at high temperature corrosion. Chapters cover diffusion and solid state reactions, external and internal oxidation of alloys, metal dusting corrosion, tribological degradation, hot corrosion, and oxide scales on hot-rolled steel strips. Modern techniques for analysing high temperature oxidation and corrosion are also discussed. Part two discusses methods of protection using ceramics, composites, protective oxide scales and coatings. Chapters focus on layered ternary ceramics, alumina scales, Ti-Al intermetallic compounds, metal matrix composites, chemical vapour deposited silicon carbide, nanocrystalline coatings and thermal barrier coatings. Part three provides case studies illustrating some of the challenges of high temperature corrosion to industry and how they can be overcome. Case studies include the petrochemical industry, modern incinerators and oxidation processing of electronic materials. This book is a valuable reference tool for engineers who develop heat resistant materials, mechanical engineers who design and maintain high temperature equipment and plant, and research scientists and students who study high temperature corrosion and protection of materials. Describes the latest developments in understanding high temperature corrosion Presents the latest research by the leading innovators from around the globe Case studies are provided to illustrate key points

High Temperature Coatings, Second Edition, demonstrates how to counteract the thermal effects of rapid corrosion and degradation of exposed materials and equipment that can occur under high operating temperatures. This is the first true practical guide on the use of thermally protective coatings for high-temperature applications, including the latest developments in materials used for protective coatings. It covers the make-up and behavior of such materials under thermal stress and the methods used for applying them to specific types of substrates, as well as invaluable advice on inspection and repair of existing thermal coatings. With his long experience in the aerospace gas turbine industry, the author has compiled the very latest in coating materials and coating technologies, as well as hard-to-find guidance on maintaining and repairing thermal coatings, including appropriate inspection protocols. The book is supplemented with the latest reference information and additional support to help readers find more application- and industry-type coatings specifications and uses. Offers an overview of the underlying fundamental concepts of thermally-protective coatings, including thermodynamics, energy kinetics, crystallography and equilibrium phases Covers essential chemistry and physics of underlying substrates, including steels, nickel-iron alloys, nickel-cobalt alloys and titanium alloys Provides detailed guidance on a wide variety of coating types, including those used against high temperature corrosion and oxidative degradation and thermal barrier coatings

This invaluable book reviews the state of the art of high temperature related problems pertaining to their utility, microstructure, mechanical properties, actual behavior in different environments, their protection by various kinds of coatings at high temperatures and a new concept of nanomaterials at high temperatures. The book begins with fundamentals of oxidation and corrosion. Various concepts relating to the modification or deterioration of mechanical properties when material is exposed to an aggressive environment compared to an inert environment or vacuum are also covered. Other chapters highlight the behavior of various advanced materials to high temperature conditions, an important high temperature effect called Active Element Effect, and many high temperature coatings and their behavior. Written by world-renowned authors in their own field, this book will be useful for professionals and academics in materials science and nanoscience. Contents:Fundamentals of High Temperature Oxidation/Corrosion (A S Khanna)Degradation of Mechanical Properties of Materials at High Temperatures in Corrosive Environments (A S Khanna)Materials Development Aiming at High Temperature Strengthening — Steels, Superalloys to ODS Alloys (Shigeharu Ukai)High Temperature Corrosion Problems in Re?neries, Chemical Process Industries and Petrochemical Plants (Pasi Kangas)High Temperature Corrosion Problems in Coal-based Thermal Power Plants (A S Khanna)High Temperature Corrosion Problems in Aircrafts (A S Khanna and Vinod S Agarwala)Coatings for High Temperature Applications (N I Jamnapara and S Mukherjee)Advanced Analytical Tools to Understand High Temperature Materials Degradation — Ion Beam Characterization of Aerospace Materials (Barbara Shollock and David McPhall)Role of Nanotechnology in Combating High Temperature Corrosion (R K Singh Raman, B V Mahesh and Prabhakar Singh)Reactive Element Additions in High Temperature Alloys and Coating (D Naumenko and W J Quadakkers) Readership: Researchers, academics, and professionals in surface science and new materials.

This text for graduate and post graduate students covers fundamentals of high temperature corrosion and related topics. Early chapters cover the thermodynamics and kinetics of oxidation and defect structure of oxides and diffusion in oxides, and later chapters cover thin and thick layer oxidation, o