Materials of Construction and High Chloride Corrosion

What is the ​most reliable ​material in a ​high chloride ​content, from ​15% to 25% ​environment and ​at temperatures ​from 60 C to 90 ​C?  ​Sandvik 2507 ​looks a real ​possibility. ​Would you ​consider  ​Carbon Steel + ​Coating as a ​cheaper ​alternative? ​