Will galvanized square tubes and rectangular tubes rust?

Will galvanized square tubes and rectangular tubes rust?

Galvanized square and rectangular tubes will actually rust, but the galvanized layer is first oxidized to protect the square tubes from rust and have a longer service life. The chromium layer of chrome plating will not react with oxygen, carbon dioxide, and water in the air under natural conditions, and will not be corroded by weak acids and alkali, so its anti-rust effect is better. Assuming that the galvanized layer is thick enough, theoretically it will not rust. Since the surface of the square and rectangular tube is wrapped with a layer of metallic zinc and is isolated from the air, the square and rectangular tube is not prone to rust. However, it will also rust over time.