Dear Colleagues,

One of the challenges facing many processes in the chemical, petro-chemical and pharmaceutical industries, energy conversion power plants, airplane turbines and waste treatment installations is an increase in the efficiency, a way for reducing emissions of polluting gases and waste. One way to achieve these goals is by increasing temperature and/or pressure. In all these applications, most of them working under hostile environments/atmospheres, the use of more resistant alloys, mainly regarding creep and oxidation resistance, working would result in the prolonged half-lives of the components. This would increase the productivity of the process and reduce the maintenance costs, extending the shutdown periods required for the inspection of installations.

This issue is dedicated to presenting new results, providing new advances in the field of high-temperature oxidation of metallic materials in different types of atmospheres, such as air, CO2, vapour-containing atmospheres, steam, as well as the oxidation behaviour under subcritical and supercritical applications involving high temperatures and high-pressure processes. Studies aiming to unveil the effect of compositional changes or microstructural changes associated with the processing route on the kinetics, the structure of the oxide scale, and the oxidation mechanism are welcome. Additionally, manuscripts evaluating the effect of variables related to the atmosphere (composition, temperature, pressure, etc.)  or those modelling the oxidation behaviour of the alloys match the scope of this Special Issue. Contributions are not limited to structural materials for high-temperature applications, such as superalloys, high/medium entropy alloys, refractory alloys, intermetallic-based alloys or multiprincipal complex alloys, but also could involve other applications and metallic materials, which could undergo degradation as a result of exposure to high temperatures.

Dr. Pablo Pérez Zubiaur
Guest Editor

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• high temperature oxidation
• superalloys
• high/medium entropy alloys
• intermetallic based alloys
• oxidation kinetics
• oxidation modelling
• oxidation mechanism

Title: Experimental determination of multiple mechanisms of surface degradation at extreme oxidation condition
Authors: Simon N. Lekakh; Oleg Neroslavsky
Affiliation: Missouri University of Science and Technology
Abstract: Methodology of experimental determination of multiple mechanisms simultaneously involved in surface degradation, including development of oxide scale, scale spallation and species volatilization will be discussed. General problem will be formalized and specific cases will be presented. Experimental data for Cr/Ni austenitic steel and high alloyed by Si/Mo cast iron will be used to illustrate suggested approaches.