Does Brass Rust?
Brass does not rust because rust is iron oxide, and brass is a copper and zinc alloy with no iron. It can still corrode over time, but it typically tarnishes instead of rusting. Tarnish often appears as a dull brown or darkened surface caused by oxidation and exposure to air, moisture, and handling.
In some environments, especially those with salt, chlorides, or ammonia, brass can develop more noticeable corrosion and may show green or bluish surface deposits similar to a copper patina. Certain brasses can also experience dezincification in aggressive water or marine conditions, where zinc is selectively removed from the alloy and the surface becomes weaker and more porous. Proper alloy selection and keeping the surface clean and dry helps brass maintain its appearance and performance.
