u/Different-Constant84

I’m hoping to create a 30ft rail gantry system that’s subject to getting slashed with fresh water. It will be in a freezing/thawing environment too so condensation will be sitting on the rails for extended periods of time. The payload is about 200 lbs and only needs to move at about 8in/s. The end-effector on the gantry needs to have a tolerance of about ± 0.5in. A lot of precision linear rails components I’ve come across are made from 400 series stainless steel which will rust. Any recommendations for suppliers or components that would work would be appreciated!