Materials for, and methods of, colorizing a metallic surface with micro-gratings using vibration cutting technologies are provided. Micro-gratings on aluminum, brass, and stainless steel surfaces can be rapidly created to effect, under illumination, at least one color observable in the visible spectrum using elliptical vibration texturing, a vibration-assisted mechanical cutting process. The modified metallic surface can display multiple visible colors, an iridescent effect caused by changes in one or more cutting parameters employed to produce the micro-gratings, the angle of illumination by an incident light, and/or the viewing angle of the surface under illumination.

The present invention provides a blackening treatment method for a black CrCo alloy plating film, the method comprising bringing a black CrCo alloy plating film having a Cr content of 1 to 15 wt. % into contact with a blackening treatment solution comprising an aqueous solution with a pH value of 1 to 5. According to the present invention, the blackish color of a less blackish plating film formed from a plating bath containing trivalent chromium is enhanced to further improve decorativeness. Furthermore, the corrosion resistance of the film can be more improved by performing electrolytic chromate treatment after blackening treatment.

The present invention provides a blackening treatment method for a black CrCo alloy plating film, the method comprising bringing a black CrCo alloy plating film having a Cr content of 1 to 15 wt. % into contact with a blackening treatment solution comprising an aqueous solution with a pH value of 1 to 5. According to the present invention, the blackish color of a less blackish plating film formed from a plating bath containing trivalent chromium is enhanced to further improve decorativeness. Furthermore, the corrosion resistance of the film can be more improved by performing electrolytic chromate treatment after blackening treatment.

A method for forming an organic coating on a surface of nickel or nickel alloy is disclosed. The method includes contacting the nickel surface with a composition comprising a specific pyrazine derived compound to prevent corrosion of nickel without forming known gold emersion film on the surface of the nickel.

Disclosed herein are methods relating to the coloring of nickel-plated materials.

Surface treatment methods for Ni-based metallic glasses are provided that promote passivation and decrease the amount of Ni released when the Ni-based metallic glass is exposed to a saline containing environment.

A method of making a treated article having a metal surface. The method includes treating the metal surface with a primer composition comprising a secondary or tertiary amino-functional compound having at least two independently selected silane groups to provide a primed metal surface and subsequently treating the primed metal surface with a treatment composition comprising a fluorinated compound represented by formula Rf{X[Si(Y).sub.3-x(R).sub.x].sub.y}.sub.z. An article treated by such a method is also disclosed. The use of a secondary or tertiary amino-functional compound having at least two independently selected silane groups as a primer for a metal surface before treatment with the fluorinated silane and a method of treating a metal surface with a treatment composition including the secondary or tertiary amino-functional compound having at least two independently selected silane groups and certain fluorinated silanes are also disclosed

A method of making a treated article having a metal surface. The method includes treating the metal surface with a primer composition comprising a secondary or tertiary amino-functional compound having at least two independently selected silane groups to provide a primed metal surface and subsequently treating the primed metal surface with a treatment composition comprising a fluorinated compound represented by formula Rf{X[Si(Y).sub.3-x(R).sub.x].sub.y}.sub.z. An article treated by such a method is also disclosed. The use of a secondary or tertiary amino-functional compound having at least two independently selected silane groups as a primer for a metal surface before treatment with the fluorinated silane and a method of treating a metal surface with a treatment composition including the secondary or tertiary amino-functional compound having at least two independently selected silane groups and certain fluorinated silanes are also disclosed

An object is to provide a novel composition for blackening treatment that can sufficiently blacken copper circuits of printed wiring boards, circuits made of silver paste, and other various articles containing a copper-based metal, such as copper or a copper alloy, or a silver-based metal, such as silver or a silver alloy, without impairing the smoothness of the copper-based metal or silver-based metal. A composition is provided for blackening treatment of a copper-based metal or a silver-based metal, the composition comprising an aqueous solution containing: (i) at least one water-soluble metal compound selected from the group consisting of water-soluble palladium compounds, water-soluble ruthenium compounds, and water-soluble silver compounds; (ii) at least one halide selected from the group consisting of hydrohalic acids, metal halides, and ammonium halides; and (iii) at least one nitrogen atom-containing compound selected from the group consisting of alkylene diamines, polyalkylene polyamines, polyamide polyamines, and crosslinked polyamide polyamines.

An object is to provide a novel composition for blackening treatment that can sufficiently blacken copper circuits of printed wiring boards, circuits made of silver paste, and other various articles containing a copper-based metal, such as copper or a copper alloy, or a silver-based metal, such as silver or a silver alloy, without impairing the smoothness of the copper-based metal or silver-based metal. A composition is provided for blackening treatment of a copper-based metal or a silver-based metal, the composition comprising an aqueous solution containing: (i) at least one water-soluble metal compound selected from the group consisting of water-soluble palladium compounds, water-soluble ruthenium compounds, and water-soluble silver compounds; (ii) at least one halide selected from the group consisting of hydrohalic acids, metal halides, and ammonium halides; and (iii) at least one nitrogen atom-containing compound selected from the group consisting of alkylene diamines, polyalkylene polyamines, polyamide polyamines, and crosslinked polyamide polyamines.