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AssigneeAsahimekki Corporation
InventorsKazuyoshi KAWAMI, Atsushi KINOSHITA, Tomoyuki FUKUTA, Yasunobu SAWADA
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[Problem] There is provided a colored stainless-steel product having excellent viewing-angle color tone discrimination and excellent corrosion resistance, in which a chemical coloration technique having sophisticated industrial color tone is used. [Solution] The product is a chemically-colored stainless-steel product having an uneven surface formed by a grinding treatment, wherein the 60-degree specular gloss [Gs (60 degrees)] of the uneven surface is 5 to 50. The grinding treatment is performed by a single sandblasting treatment or a combination of the sandblasting treatment and an electrolytic polishing treatment. The sandblasting treatment is performed with a projection material configured from inorganic particles having a Mohs' hardness of at least six. A manufacturing method includes a sandblasting treatment step, an electrolytic polishing treatment step, a coloration treatment step for dipping stainless steel in a coloration treatment solution including a mixed solution of a chromic acid and a sulfuric acid to generate a colored film thereon, and a curing treatment step for dipping the coloration-treated stainless steel in a curing treatment solution including a mixed solution of a chromic acid and a phosphoric acid to cure the colored film.
1-8. (canceled)
Chemically-colored stainless steel having an uneven surface formed by a grinding treatment performed by a combination of a sandblasting treatment and an electrolytic polishing treatment, characterized in that a 60-degree specular gloss [Gs (60 degrees)] of the uneven surface is 5 to 50.
A method of manufacturing chemically-colored stainless steel, the method comprising:
Chemically-colored stainless steel having an uneven surface formed by a sandblasting treatment, characterized in that a 60-degree specular gloss [Gs (60 degrees)] of the uneven surface is 5 to 50 and a thickness of a colored film formed on the uneven surface at a coloration potential speed of 0.02 to 0.08 mV/sec is 90 nm to 220 nm.
A method of manufacturing chemically-colored stainless steel, the method comprising:
Dependencies are inferred from the claim text.