Demsha. If you want more specific answers then you need to provide more specific data.
Such as chloride level, o2 level, temp, pressure etc. Anything specific to SAGD.
There's lots of info here and out there on corrosion from salt water.
What material are you thinking of our using now. Warm/hit aerated salt water is very corrosive to many metals. How much money do you have?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.