**Preface to "Microstructure and Corrosion Behavior of Advanced Alloys"**

In many industrial applications, metallic materials are exposed to harsh operating conditions. Due to a combination of chemical and thermal stresses, the constructional and functional materials are degraded and their utility properties are lost. These undesirable events are of a physicochemical nature and are commonly known as 'corrosion'. Several internal and external factors influence the corrosion behavior of materials. Internal factors include the chemical composition, microstructure, and phase constitution of the materials. External factors that can significantly contribute to an increase in corrosion resistance include surface treatments and the use of various protective coatings. In this Special Issue Book, 3 reviews and 18 original research papers focused on the complex relationships between the microstructure, phase constitution, and corrosion behavior of metallic materials are collected. Both high temperature and low temperature corrosion studies are included as they investigate the physicochemical processes at the material interfaces. Furthermore, possibilities for increasing the corrosion resistance of metallic materials are studied by means of surface modification and application of protective layers. This Special Issue Book, Microstructure and Corrosion Behavior of Advanced Alloys, displays the diversity and complexity of modern corrosion research. It is hoped that it will become a valuable source of reference for corrosion scientists.

I am thankful to Ms. Hellen Hu from MDPI for providing valuable support during Special Issue editing.

This work was supported by the Slovak Research and Development Agency under the Contract no. APVV-20-0124.

> **Mari ´an Palcut** *Editor*
