Abstract
The candidate materials for the Generation-IV nuclear power reactors include modified stainless steels, as 316L in order to improve corrosion resistance in extreme conditions (liquid metals, higher temperature than the upper limit of conventional austenitic stainless steels). The aim of this study is to explore in-depth microstructural changes of aluminium containing surface layer developed by Plasma Electrolysis technique on 316L austenitic stainless steel. Complex surface treatments were performed involving anodic oxidation, high-temperature autoclaving in water and micro-arc oxidation in aqueous solution of 0.1 M NaAlO2 and 0.05 M NaOH. The obtained structures were characterized by X-Ray Diffraction, Metallography, Scanning Electron Microscopy and Small Angle Neutron Scattering. Unique surface characteristics were observed due to thermal, chemical, electrical and mechanical effects as a result of Plasma Electrolysis Processing. Corrosion behavior of plasma treated samples was investigated by electrochemical techniques. Some considerations for the further development of the new advanced nuclear materials are presented.
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