A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 µm.
一种具有优异耐腐蚀性能的涂层钢板包括:
锌或
锌合
金电镀钢板或铝或铝合
金电镀钢板;在电镀钢板表面形成的复合氧化物涂层;以及在复合氧化物涂层上形成的有机涂层。复合氧化物涂层包含细颗粒氧化物和
磷酸和/或
磷酸化合物。有机涂层的厚度为 0.1 至 5 微米。