I want balcony furniture that will not rust or pit in salt air

Look for patio sets made from Teak. Teak is a very durable wood that can take sun and cooler weather. It is very easy to maintain with a yeraly application of teak oil. You can find it on many wed sites like Amazon, Home goods etc.

Find yourself some teak furniture. It can be treated to stay the color of when you purchased (medium to light brown) or you can let it weather to a nice soft grey appearance by not treating it at all.

It’s called plastic

https://www.familyleisure.com/Blog/Beachside-Furniture

Teak is the way to go, just be sure to inspect quality, there is cheap (no Teak is inexpensive), and there is quality construction Teak. This is one time I would recommend seeking out (Google for your area), high end patio and garden furniture stores and visit in person. The only thing that will stand up to salt air. My brother and sister in law live in Los Osos, CA and that is the only thing that weathers well, and the West coast is no where as salty as the Florida coast.

I live at the beach and we have these and they've held up very well.

http://www.patioshoppers.com/products/POLYWOOD_Club_Chair_with_Cushion-1499-0.html

Teak - but keep it oiled in the salt air. Teak is an old standby on boats (long ago, not as much now as things are made cheaply). It will take the salt air, bu you must apply the oil every year or so.