Choose antenna material sustain with environtment

I must choose material for antenna working on island (near the sea). Most antenna quickly damage if they made from stell, iron as well as aluminum.

I don't know what material could i make for my antenna, it can work for long time.

I would suggest to use marine experience. For use on ships, long-wire antennas are made of copper or bronze wire and heavily painted . Microwave antennas are made of aluminum and again, painted with varnishes resisting salty mist.
You can cover small antennas by radomes made of Teflon or glass laminate.

hi noisepic
what are u designing now?i think u should find some papers in library if u r a student or on the website.Also u can give us more details about it.Good luck to u!