If you have a pool with a metal frame instead of concrete/gunite there is always some risk of corrosion. I would check the manufacturers/builders warranty to make sure the warranty isn't rendered void first. If so, then the best way to go is manually chlorinating, possibly with the assistance of a tablet feeder system.

I've got a gunite pool that's about 5 years old now and has had a swcg since it was built I've only owned the house for two years, but as best I can tell there's not much metal (maybe rebar?) to worry about. I get a lot of rain here in FL, so lots of salt gets washed out and onto things around the pool. That's no problem for me, though because nothing around the pool is metal with the exception of the metal ring around my pool light (stainless, still looks perfect).

Are you placing a vinyl liner over a brand new gunite or pebbletec surface?