Loose bearings are available in both chromium and stainless in "grade 25" (i.e. same precision in manufacture) the only difference is a slight difference in hardness (yield stenght 295,000 psi vs 275,000 for chromium vs stainless respectively). Price differnce is small favoring chromium. What do you use and/or prefer? Experiences?
Keep in mind that neglected load bearing surfaces may corrode regardless of the bearing running in them and neglect (e.g. dirt) will ruin both.
P.S. Perhaps a new thread, ceramic bearings (a set costs as much as "cheap" hubs....... )