I tried to do a search on this subject and could only find this, i'm sure if i spent more time on it i would be able to find more.
The greatest structural dangers of indoor swimming pools are two-fold:
2. Oxidizers in Air Suspension
Let's discuss the first one:
1. Moisture/Humidity. Normally, an indoor pool will have a very large dehumidification unit or two located in close proximity to it, and that area of the building will be reasonably well sealed.
The moisture from an indoor pool is relentless, and can cause a significantly higher incidence of mold damage in your structure, unless moisture levels are effectively managed.
Now, specialty coatings may help with this issue, but absolutely will not solve it by itself.
2. Oxidixers, such as chlorine, bromine, sodium hypocloride, etc., will equally as relentlessly attack every metal object within the pool area. This means light stitches, light sockets, wall plugs, nails, door and window frames, etc.
As much as possible, you will have to coat these, and repeat every so often.
It's actually better to try to cover all such exposed metal, or use wood only, such as in timberframe construction.
So, the right coatings is a good idea, but it's only part of the solution.