摘要:
PROBLEM TO BE SOLVED: To provide a coating method which is substituted for the conventional chromium plating. SOLUTION: The coating method comprises: a step of providing an article to be coated; a step of providing an electroplating bath solution having a chemical composition composed of about 180 to 210 g/l of cobalt chloride, about 0.05 to 2.0 g/l of cobalt carbonate, about 45 to 55 g/l of ortho-phosphoric acid and about 5.0 to 15.0 g/l of phosphorus acid; and a step of placing the article in contact with the plating bath solution and applying a current to laminate a coating onto the article. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a material coated with an antitarnish adhesion-promoting aqueous treatment composition which is substantially chromium-free and generates, on a substrate or the material, a film for enhancing adhesion of a polymer to the material. SOLUTION: The material includes atoms of zinc or zinc oxide and atoms of a metal or metal oxide selected from the group consisting of tungsten, molybdenum, cobalt, nickel, zirconium, titanium, manganese, vanadium, iron, tin, indium and silver. The material is substantially chromium-free and covered with an anti-tarnish adhesion-treated film which has tarnish resistance for at least 30 min at 250°C and includes a nodular structure enhancing adhesion of a polymer to the material. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a coating method which replaces for the conventional chromium plating. SOLUTION: This invention comprises: a step of providing an article to be coated; a step of providing a plating bath solution having a chemistry of from about 180 to 210 g/l cobalt chloride, from about 0.05 to 2.0 g/l cobalt carbonate, from about 45 to 55 g/l ortho-phosphoric acid, and from about 5.0 to 15.0 g/l of phosphorous acid; and a step of placing the article in contact with the bath solution and applying a current to deposit the coating onto the article. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a nickel plating solution and its preparation method, and a nickel plating method, which are suitable for nickel or nickel alloy plating to be applied to printed wiring board copper foil, and capable of continuously performing stable plating even in the use of an insoluble anode and reducing the load on the environment, and to provide printed wiring board copper foil with good adhesion to a printed wiring board base material. SOLUTION: The printed wiring board copper foil 7 has a nickel plating layer (nickel-cobalt alloy plating layer 3) applied by a nickel plating method using a nickel plating method solution prepared by dissolving in water 100 g/L or more and less than 200 g/L of nickel sulfate, and 10 g/L or more and less than 30 g/L of sodium citrate or 8 g/L or more and less than 25 g/L of citric acid, but adding no nickel chloride; and adjusting the pH of the resultant solution to 2 or more and less than 4 and using the insoluble anode as the anode. COPYRIGHT: (C)2007,JPO&INPIT