Patent ID: 8895153

Claim:
A chemically treated aluminum-based plated steel sheet, comprising: an aluminum-based alloy plated steel sheet, the aluminum-based alloy containing 85-99% by weight of aluminum; and a chemical conversion film having a film thickness of 0.5-10 μm formed on a surface of the aluminum-based alloy plated steel sheet, wherein the chemical conversion film contains a fluororesin and a group 4A metal compound, the fluororesin containing a total of 0.05-5% by weight of a hydrophilic functional group selected from the group consisting of a carboxyl group, a sulfonic acid group and a salt thereof, and 7-20% by weight of a fluorine atom, and the group 4A metal compound content, with respect to the fluororesin, is within a range of 0.1-5% by weight in terms of a group 4A metal of the group 4A metal compound.