Materials matter: copper resists corrosion and conducts well
https://telegra.ph/DIY-ElectroCulture-Antennas-Affordable-Projects-for-Home-Gardeners-05-17
Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.