It is normal for galvanized to rust.; otherwise, the zinc plate is impure and contains impurities such as iron. In addition, zinc protects other metals, and the uneven coating of zinc exposes the metal inside, causing corrosion. Or they inadvertently come into touch with other metals, resulting in chemical corrosion.
Hot Dip Galvanized Steel Sheet will also rust, but the galvanized layer is oxidized first to protect the steel sheet from rusting, and its service life is longer. In addition, the chrome-plated chrome layer will not react with oxygen, carbon dioxide, and water in the air under natural conditions, nor will it be corroded by weak acids and alkalis. Its anti-rust effect is better.
Hot Dip Galvanized Steel Sheet will not rust in a typical environment, but it may rust due to improper storage, scratches and bumps, water intrusion, and steam fumigation. Galvanized sheet rusts because zinc is corroded, protecting other metals. Otherwise, the zinc plate is impure and contains impurities, such as iron.