Chromate-free precoated metal sheet having metallic appearance and water-based coating composition used in the same

A chromate-free coated metal sheet including:

• a metal sheet;
• and
• a coating film α which contains an organic resin A as a film formation component and 7 to 40% by mass of a flaky aluminum pigment C having a deactivation-treated surface on at least one surface of the metal sheet,
• wherein a surface of the aluminum pigment C is coated with a film containing at least one selected from the group consisting of a phosphoric acid compound, a molybdic acid compound, and silica, or a two-layer film including a film containing an acrylic resin and a film containing a phosphoric acid compound;
• a thickness of the coating film α is in a range of 1.5 to 10 μm;
• a surface of the metal sheet is coated with the single coating film α;
• and
• the amount of the aluminum pigment C in the coating film α is in a range of 10 to 20% by mass.