Magnetic field effect on the corrosion processes at the Eurofer-Pb-17Li flow interface
It is planned to breed the reaction in future fusion reactors with lithium from solid lithium ceramics from the eutectic liquid-metal lithium-lead (LiPb). The breeder will be in direct contact with the reduced activation ferritic-martensitic (RAFM) structural steel EUROFER97. Therefore, extended data on the behavior and interaction of exposed materials are needed.
Compatibility about the interaction between LiPb and EUROFER has already been studied. However, the effect of a magnetic field has not been considered. This effect is expected to be critical because it changes the hydrodynamics of the metal flow affecting the corrosion process and interacts with the ferromagnetic steel.
Corrosion tests have been carried out simulating the experimental conditions of a fusion reactor. Several EUROFER samples were immersed in LiPb flowing, at 550ºC, 5 cm/s during 1000 hours. Moreover, a perpendicular-flow 1.7 T magnetic field has been applied in a specific part of the loop. Identical EUROFER samples were tested under the same conditions without the magnetic field.