| 摘要 |
Even if a resin film is laminated onto a substrate surface made from aluminium or an aluminium alloy, and molding is subsequently carried out, the metal surface treatment agent for forming a surface treatment coating that is provided imparts a high adhesion so as to prevent peeling of the laminate film, and can maintain a stable adhesion over the long term, regardless of exposure to solvents and acids. The metal surface treatment agent for forming a metal surface treatment coating for a resin undercoat or laminate on a substrate surface made from aluminium or an aluminium alloy contains a Cr(III) compound (A), and at least one type of compound (B) selected from inorganic compounds and organic compounds having film-forming properties and organic compounds which can bond to compound (A) to form a film. If the metal Cr equivalent mass of compound Cr(III) compound (A) is set to M, and the mass of compound (B) is set to N, the ratio N/M is set to fall within the range of 0.005 to 1. |
