Abstract: An object of the present invention is to provide a treatment liquid and a treatment method that are capable of enhancing the corrosion resistance of a net material. This object is achieved by, after forming a chemical conversion treatment film on the surface of a metal material, forming a film using a film-forming treatment liquid, the treatment liquid comprising: a silicon compound containing at least one member selected from the group consisting of alkoxysilyl, alkoxysilylene, and a siloxane bond; an organometallic compound; and water.

Abstract: Improved plating is provided. The present invention provides a plated product which comprises a base, a deposit layer formed by plating on a surface of the base, and a silica-compound-containing coating layer formed on the surface of the deposit layer. The coating layer has a thickness of 0.1-100 ?m, preferably 0.1-20 ?m, more preferably 0.1-10 ?m, even more preferably 0.1-5 ?m. The coating layer may contain a dye and/or a pigment.

Abstract: This invention relates to a coating formation composition and a metal material treatment method that are capable of forming a laminate coating in which a chemical conversion coating and a surface treatment coating are laminated by applying and heating the composition on the surface of the metal material, without performing a chemical conversion treatment on the metal material separately from the surface treatment, and that are capable of imparting excellent rust prevention properties to the metal material. The invention provides a coating formation composition comprising an alkoxysilane oligomer, a metal salt, and a solvent, the solvent being water and/or a water-soluble organic solvent, and the metal salt being contained in an amount of 0.1 to 30 parts by mass per 100 parts by mass of the alkoxysilane oligomer.