| NIHON PARKERIZING CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120118434 | STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME - A process for duplex heat treatment of combined nitriding treatment and induction quenching treatment on an iron and steel material includes a chemical conversion treatment step for forming a chemical conversion film on a nitrogen compound layer formed on the iron and steel material by the nitriding treatment, after the nitriding treatment and before the induction quenching treatment. A compound layer formed on a surface of an iron and steel material by nitriding treatment is prevented from being oxidized by induction quenching, so that unevenness in film thickness between different portions of an oxidization-inhibiting film does not easily occur, with the result that a nitrogen-containing compound layer obtained after high-frequency heating remain uniformly. | 05-17-2012 |
| 20110311838 | COMPOSITION FOR TREATING SURFACE OF METAL, METHOD FOR TREATING SURFACE OF METAL USING THE COMPOSITION, AND COATING FILM FOR TREATING SURFACE OF METAL UTILIZING THE COMPOSITION AND THE METHOD - A composition for metal surface treatment capable of forming films and imparting excellent corrosion resistance in relation to metallic materials, in particular, metal formations having complex shapes through a single dipping step. A composition for metal surface treatment contains 5 to 30% by weight of a nonionic and/or cationic water-based resin, 100 to 1,000 ppm of trivalent Bi ions and an aminopolycarboxylic acid at 0.5 to 10 times in molar concentration based on the Bi ions. | 12-22-2011 |
| 20110274939 | HYDROPHILIZING AGENT FOR ALUMINUM-CONTAINING METAL MATERIAL, HYDROPHILIZING METHOD, AND HYDROPHILIZED ALUMINUM-CONTAINING METAL MATERIAL - A hydrophilizing agent that maintains a favorable wettability for dew condensation even after a long-term use; a hydrophilizing method; and an aluminum-containing metal material treated by the hydrophilizing method and having excellent wettability for dew condensation are provided. The hydrophilizing agent contains a modified polyvinyl alcohol obtained by graft polymerization of at least one type of N-vinyl lactam onto polyvinyl alcohol, thereby having a polymer and/or copolymer of the N-vinyl lactam in a side chain and a water-soluble cross-linking agent which can bind to a lactam moiety and/or a hydroxyl group of the modified polyvinyl alcohol. By applying and drying the hydrophilizing agent, a hydrophilic film having excellent wettability for dew condensation is formed. | 11-10-2011 |
| 20110155949 | PROCESS FOR PRODUCTION OF ALUMINUM WHEEL - A process for producing an aluminum wheel includes a cleaning step, in which the surface of the aluminum wheel is chemically etched with an alkali cleaning liquid which contains an alkali builder, an organic builder, and a chelating agent to such an extent that the Si atomic ratio of metal Si to oxide Si is from 0.01 to 9, and a shot blast treatment step can be omitted for cleaning the surface of the aluminum wheel. | 06-30-2011 |
| 20100163138 | METHOD FOR QUENCHING OF STEEL MEMBER, QUENCHED STEEL MEMBER, AND AGENT FOR PROTECTING QUENCHED SURFACE - A technique for increasing mechanical strength, such as contact pressure strength, and abrasion resistance and bending fatigue strength, of mechanical and/or structural parts by using surface hardening treatment. A quenched steel member, wherein a hard nitride layer is formed on the surface of a steel material, and an inorganic compound layer containing at least one metal oxide selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al is formed on the hard nitride layer. | 07-01-2010 |
| 20100032301 | ALUMINUM ALLOY MEMBER AND METHOD FOR MANUFACTURING SAME - An aluminum alloy member includes a main body including an aluminum alloy serving as a base material, and an electrolytic oxidation ceramic coating coated at a portion of a surface of the main body and including a most outer layer and an inner layer which is arranged close to the main body relative to the most outer layer, the inner layer in which an aluminum oxide is richer than the most outer layer, the most outer layer in which a volume of a titanium oxide or a total volume of the titanium oxide and a zirconium oxide is richer than the inner surface. | 02-11-2010 |
| 20090178454 | Particles coated with metallic soap and products and preparation process using them, and lubricating coating forming agent and lubricating coating - Particles each of which consists of an inorganic polyvalent metal compound as a nucleus and a coating of a metallic soap of the polyvalent metal coating the nucleus (coated particles); products and preparation processes using the particles; a lubricating coating forming agent wherein particles each of which consists of a polyvalent metal salt of phosphoric acid as a nucleus and a coating of a metallic soap of the polyvalent metal coating the surface of the nucleus are suspended in an aqueous solution of a water soluble inorganic salt and/or a water soluble organic acid salt; and a lubricating coating. The coated particles are novel particles which can be used as an ingredient of coating-type lubricating coating; are excellent in seizure resistance; can inhibit wear of tools at the time of plastic working since the friction coefficient of the surface of the particles is low; and are slow to cause pollution of working oils. Lubricating coating obtained by applying the lubricating coating forming agent onto the surface of a metallic material gives excellent cold plastic working properties, namely lubricity and seizure resistance to the metallic material. | 07-16-2009 |
| 20090068049 | ROTARY EQUIPMENT AND OIL PUMP - An oil pump has: a base part having a working chamber; and a rotor provided rotatably in the working chamber. The base part is configured by a plurality of split bodies. At least one of the plurality of split bodies is made of aluminum alloy, and on which an opposed sliding surface made of a ceramic film is formed. The ceramic film of the opposed sliding surface has a hardness of approximately Hv 500 to 1100 and a surface roughness of approximately 2 to 8 micrometers, and contains α-alumina and zirconia. | 03-12-2009 |
