Corrosion Behaviors of Metallic Materials in Extreme Environments

Dear Colleagues,

The challenges for structure materials in hostile environments have been baffling the development of many important industrial fields such as nuclear energy. In addition to acceptable mechanical properties, the compatibility with the environments is also a crucial requirement for the structure materials. In current light water reactors, the coolant, i.e. high temperature water, is hostile enough for many structure materials. As the nuclear reactor is being developed to the next generation, the service environment for materials will inevitably get harsher and even go to extreme. For example, the typical coolants used in generation Ⅳ reactor are supercritical water, high temperature gas, supercritical CO₂, liquid metal and molten salt. Not only will the ranges of operating temperature and the irradiation damage accumulated in materials greatly expand, but also the corrosiveness of environment will be drastically aggravated. These extreme environments pose great challenges to the materials available at present and demand the development of advanced structure material.

Metallic materials are still the basis for the implement of advanced reactors. Great research efforts have been made worldwide to develop metallic materials suitable for use in those extreme environments. In particular, high entropy alloys (HEAs) show some promising features such as high resistances to irradiation damage and corrosion. Additively manufactured materials have also received intensive attention due to the efficiency in manufacturing complex component as well as enhanced performance.

This special issue aims to compile recent progress in the corrosion behaviors of metallic materials in extreme environments (not limited to the above-mentioned coolants). The topic covers general corrosion, localized corrosion, oxidation, stress corrosion cracking, liquid metal embrittlement, and irradiation-assisted corrosion. Articles about corrosion test technique and corrosion simulation are also encouraged.

Prof. Dr. Wenjun Kuang
Guest Editor

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