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公开(公告)号：US11643732B2
公开(公告)日：2023-05-09
申请号：US15497776
申请日：2017-04-26
发明人： Manabu Inoue , Kimitaka Watanabe , Go Nagata , Motoi Nakatani , Keita Ishizu , Toshiki Inomata
IPC分类号： C23C22/30 , C23C22/77 , C23C22/53 , C23C22/83 , C23C22/46 , C23C22/40 , C23C22/47 , C23C28/00 , C09D5/08 , C23C22/27 , C23C22/33
CPC分类号： C23C22/77 , C09D5/08 , C23C22/27 , C23C22/30 , C23C22/33 , C23C22/40 , C23C22/46 , C23C22/47 , C23C22/53 , C23C22/83 , C23C28/3225 , C23C28/34 , C23C2222/10 , Y10T428/273
摘要： A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 μg/cm2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80° C. and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100° C. water for 10 minutes) is smaller than 0.05 μg/cm2.
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公开(公告)号：US20210317591A1
公开(公告)日：2021-10-14
申请号：US17264405
申请日：2019-07-12
发明人： Yutaka MORII , Go NAGATA , Satoshi YUASA
摘要： A tin alloy electroplating bath, wherein the tin alloy electroplating bath includes (A) a soluble tin salt, (B) a soluble nickel salt and/or a soluble cobalt salt, (C) an oxycarboxylic acid or a salt thereof, (D) a nitrogen-containing heterocyclic unsaturated compound, and (E) a surfactant, and the pH of the tin alloy electroplating bath is 3 to 7.
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公开(公告)号：US10538854B2
公开(公告)日：2020-01-21
申请号：US15519474
申请日：2015-06-25
发明人： Hitoshi Sakurai , Kazunori Ono , Akira Hashimoto , Satoshi Yuasa
IPC分类号： C25D21/14 , C25D3/58 , C22C9/06 , C22C19/00 , C22C19/03 , C25D3/56 , C25D17/00 , C25D21/12 , C25D21/06 , C25D21/10 , C25D5/08
摘要： Provided is a copper-nickel alloy electroplating apparatus which is capable of stably forming a copper-nickel plated coating on a workpiece with a uniform composition and which enables a plating bath to be used for a long period. The present invention provides a copper-nickel alloy electroplating apparatus (1), comprising: a cathode chamber (4) in which a workpiece (5) is to be placed; an anode chamber (6); an anode (7) placed in the anode chamber; an electrically conductive diaphragm (14) placed to separate the cathode chamber and the anode chamber from each other; a cathode chamber oxidation-reduction potential adjusting tank (8) for adjusting the oxidation-reduction potential of a plating liquid in the cathode chamber; an anode chamber oxidation-reduction potential adjusting tank (10) for adjusting the oxidation-reduction potential of a plating liquid in the anode chamber; and a power supply unit (36) that provides an electric current to flow between the workpiece and the anode.
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公开(公告)号：US20170241040A1
公开(公告)日：2017-08-24
申请号：US15519474
申请日：2015-06-25
发明人： Hitoshi SAKURAI , Kazunori ONO , Akira HASHIMOTO , Satoshi YUASA
摘要： Provided is a copper-nickel alloy electroplating apparatus which is capable of stably forming a copper-nickel plated coating on a workpiece with a uniform composition and which enables a plating bath to be used for a long period. The present invention provides a copper-nickel alloy electroplating apparatus (1), comprising: a cathode chamber (4) in which a workpiece (5) is to be placed; an anode chamber (6); an anode (7) placed in the anode chamber; an electrically conductive diaphragm (14) placed to separate the cathode chamber and the anode chamber from each other; a cathode chamber oxidation-reduction potential adjusting tank (8) for adjusting the oxidation-reduction potential of a plating liquid in the cathode chamber; an anode chamber oxidation-reduction potential adjusting tank (10) for adjusting the oxidation-reduction potential of a plating liquid in the anode chamber; and a power supply unit (36) that provides an electric current to flow between the workpiece and the anode.
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5.发明申请TRIVALENT CHROMIUM-CONVERSION PROCESSING SOLUTION CONTAINING ALUMINUM-MODIFIED COLLOIDAL SILICA 有权包含铝改性胶体二氧化硅的TRIVALENT CHROMIUM转换处理解决方案公开(公告)号：US20150135988A1
公开(公告)日：2015-05-21
申请号：US14403857
申请日：2013-06-04
发明人： Shinji Yamaguchi
摘要： The present invention provides a trivalent chromium-conversion processing solution characterized by containing aluminum-modified colloidal silica.
摘要翻译： 本发明提供三价铬转化处理溶液，其特征在于含有铝改性胶体二氧化硅。
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6.发明申请公开(公告)号：US20030121570A1
公开(公告)日：2003-07-03
申请号：US10085705
申请日：2002-03-01
IPC分类号： C23C022/46
CPC分类号： C23C28/3225 , C23C22/46 , C23C22/47 , C23C28/00 , C23C28/02 , C23C28/321 , C23C28/345 , C23C28/3455 , C23C2222/10 , Y10T428/12583 , Y10T428/12799 , Y10T428/31678
摘要： A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises a silicon compound; trivalent chromium and oxalic acid in a molar ratio ranging from 0.5 to 1.5, wherein the trivalent chromium is present in the form of a water-soluble complex with oxalic acid; and cobalt ions, which form a hardly soluble metal salt with oxalic acid and are stably present in the processing solution without causing any precipitation, wherein the solution reacts with zinc when bringing it into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, corrosion resistant, trivalent chromate conversion film containing zinc, chromium, cobalt, oxalic acid and silicon on the plating. This solution can provide a corrosion resistant trivalent chromate conversion film excellent in the corrosion resistance after heating.
摘要翻译： 用于在锌或锌合金镀层上形成六价铬无腐蚀的三价铬酸盐转化膜的处理溶液包括硅化合物; 三价铬和草酸的摩尔比范围为0.5至1.5，其中三价铬以与草酸的水溶性络合物的形式存在; 和钴离子，其与草酸形成难溶的金属盐，并且稳定地存在于处理溶液中而不引起任何沉淀，其中溶液与锌在与锌或锌合金镀层接触时与锌反应形成六价铬 在镀层上含有锌，铬，钴，草酸和硅的三价铬酸盐转化膜。 该溶液可以提供加热后的耐腐蚀性优异的耐腐蚀性的三价铬酸盐转化膜。
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公开(公告)号：US20230304160A1
公开(公告)日：2023-09-28
申请号：US18016291
申请日：2021-07-19
IPC分类号： C23C22/53
CPC分类号： C23C22/53 , C23C2222/10
摘要： The present invention addresses the problem of providing a chemical conversion treatment solution that contains zirconium ions and that makes it possible to form a highly corrosion-resistant chemical conversion coating formed with consideration for the environment as well. The present invention provides a chemical conversion treatment solution that contains trivalent chromium ions, zirconium ions, aluminum ions, at least one type of carboxylic acid ions, and at least one type of silicon compound, the chemical conversion treatment solution being free of fluorine ions and fluorine compounds.
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公开(公告)号：US20230041195A1
公开(公告)日：2023-02-09
申请号：US17787858
申请日：2020-11-05
发明人： Masayoshi MIKAMI , Manabu INOUE
摘要： The purpose of the present invention is to provide a zinc-nickel-silica composite plating bath that has been improved in terms of: covering power for articles having a complex shape; and corrosion resistance of a low current density portion where the film thickness is small. The present invention pertains to a zinc-nickel-silica composite plating bath, the plating bath having a pH of 3.5 to 6.9, and containing zinc ions, nickel ions, colloidal silica, and chloride ions. The colloidal silica is a cationic colloidal silica having on the surface thereon at least one species of metal cation selected from the group consisting of trivalent to heptavalent metal cations.
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公开(公告)号：US20220396884A1
公开(公告)日：2022-12-15
申请号：US17888926
申请日：2022-08-16
摘要： An object is to provide a trivalent chromium chemical conversion treatment liquid for a zinc or zinc alloy base capable of forming an environmentally-friendly chemical conversion coating with high corrosion resistance. The present invention provides a hexavalent chromium-free trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy, the liquid comprising trivalent chromium ions, zirconium ions, nitrate ions, and chain colloidal silica, in which the pH of the treatment liquid is 2.5 to 5.0.
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公开(公告)号：US11008659B2
公开(公告)日：2021-05-18
申请号：US15539566
申请日：2015-12-25
发明人： Ayumi Saito , Masatoshi Ishikawa , Takashi Koike
摘要： The present invention provides a chemical conversion liquid for zinc or zinc alloy bases, which contains 2-200 mmol/L of trivalent chromium ions, 1-300 mmol/L of zirconium ions and at least one component selected from among fluorine ions, a water-soluble carboxylic acid and a salt thereof, and which does not contain Co ions and hexavalent chromium ions.
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