Neutron radiation leads to embrittlement in many materials, so the long term effects will have to be considered in addition to short term corrosion rate improvements.
That’s a really good point, and I agree, but any alloy used for reactor components is going to have to deal with embrittlement one way or another. At the end of the day this is just another potential tool in the alloy design toolbox, and it might or might not turn out to be useful for mitigating corrosion in reactor materials