Corrosion is by far not the main issue holding back Thorium reactors. In fact in the MSR experiment they did a lot of work on corrosion and they considered it v

Corrosion is by far not the main issue holding back Thorium reactors. In fact in the MSR experiment they did a lot of work on corrosion and they considered it very solvable. Re-qualifying that material would be tricky and costly, but there are companies doing it. For the MSR style modern 2 fluid reactor your main problem is the chemical plant that needs to live in the reactor itself. Secondly Thorium has absolutely no regularly support, and given the way nuclear regulation works its basically impossible to get a new fuel and type of reactor to market. There is Thorium fuel for LWR coming to the market very slowly, but the advantages of that are very limited.