Surface Treated Metal Sheet

Abstract: This surface-treated metal sheet comprises: a steel sheet; a plating layer that is formed on the steel sheet and contains zinc; and a coating film that is formed on the plating layer. With respect to this surface-treated metal sheet, the coating film contains an organosilicon compound, a phosphoric acid compound, and a fluorine compound. With respect to the surface roughness of a 1 µm square area of the surface of the coating film, if Sa is the arithmetic mean height, Sz is the maximum height and Sq is the root mean square roughness, one or more of the following conditions are satisfied: the arithmetic mean height Sa is from 0.1 nm to 10 nm; the maximum height Sz is from 1 nm to 1,000 nm; and the root mean square roughness Sq is from 0.1 nm to 100 nm.

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