Surface-treated aluminum sheet, resin-coated surface- treated aluminum sheet, and molded body

Abstract

[Object] To provide a surface-treated aluminum sheet having all of corrosion resistance, formability, and resin adhesion. [Solving Means] A surface-treated aluminum sheet includes an aluminum base material and an amorphous layer formed on at least one side of the aluminum base material. The aluminum base material is an aluminum sheet or an aluminum alloy sheet. The amorphous layer contains aluminum hydroxide, has an oxygen element to aluminum element (O/Al) ratio in a range of 1.7 to 3.0, and has a thickness of 1 nm or greater. As an alternative, a surface-treated aluminum sheet includes an aluminum base material and a surface treatment layer formed on at least one side of the aluminum base material. The aluminum base material is an aluminum sheet or an aluminum alloy sheet. The surface treatment layer contains aluminum hydroxide, and has a Pa/Pb value of 6.0 or smaller when, in an infrared absorption spectrum measured by FT-IR, the height of an absorbance peak at wavenumbers of 850 to 1000 cm−1 is defined as Pa and the height of an absorbance peak at wavenumbers of 1000 to 1200 cm−1 is defined as Pb.

Dependencies are inferred from the claim text.