In my world, zinc is useful as an anti-magic material. This ability manifested shortly after the discovery of magic, and now zinc will erode and decay when exposed to magic, dissipating into nothingness as it disperses the magical effects directed at it. This makes zinc more valuable than gold in the economy of my world. Magic users are a minority, and otherwise, the world is technologically and socially similar our own. Zinc alloys that are exposed to magic develop pockmarks and abscesses as the zinc disappears, leaving only the other metals. even simple brass machinery, like gears in a watch, or zippers on clothing will be rendered useless by exposure to magic.
Because zinc is so much more expensive, brass is now used mostly as anti-magic armor or melted down for zinc.
Is there a different material or alloy that could replace brass in most of its modern day applications?
this question is related to Zinc is a precious metal. What alloys are no longer practical?