Would gold plated brass necklaces rust?

Gold-plated brass necklaces typically do not rust, as rust is a term used specifically for the corrosion of iron. However, the brass underneath the gold plating can tarnish over time, especially if exposed to moisture, sweat, or harsh chemicals. To maintain their appearance, it's best to keep them dry and store them properly when not in use. Regular cleaning can also help prevent tarnishing.