The majority of metal corrosion in a pool is due to an incorrect water balance, rather than the use of salt. Stainless steel is fairly well suited to withstand salt. 316 steel is not damaged by salt, while 304 steel, which was historically used in pools, does corrode over time. On the other hand, galvanised steel suffers greatly when exposed to salt. Should corrosion appear within one year, this is due to a water balance issue, rather than the presence of salt alone.