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公开(公告)号：US12006586B2
公开(公告)日：2024-06-11
申请号：US17996632
申请日：2021-04-21
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
摘要： An object comprising a chromium-based coating on a substrate is disclosed, wherein the chromium is electroplated from an aqueous electroplating bath comprising trivalent chromium cations, wherein the chromium-based coating comprises 87-98 weight-% of chromium, 0.3-5 weight-% of carbon, and 0.1-11 weight-% of nickel and/or iron, and wherein the chromium-based coating has a Vickers microhardness value of 1000-2000 HV, and wherein the chromium-based coating does not contain chromium carbide. Further is disclosed a method for its production, and an aqueous electroplating bath.
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公开(公告)号：US11795559B2
公开(公告)日：2023-10-24
申请号：US17919688
申请日：2021-04-21
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
摘要： An object comprising a chromium-based coating on a substrate is disclosed. The chromium is electroplated from an aqueous electroplating bath comprising trivalent chromium cations, wherein the chromium-based coating comprises: a first chromium-containing layer, on the substrate, having a thickness of at least 100 nm, and a Vickers microhardness value of 700-1000 HV; a second chromium-containing layer, on the first chromium-containing layer, having a Vickers microhardness value that is at least 1.3 times higher than the Vickers microhardness value of the first chromium-containing layer, and a crystal size of 8-35 nm; and wherein the chromium-based coating exhibits a critical scratch load value (LC2) of at least 60 N in the adhesion test according to ASTM C1624-05 (2015; point 11.11.4.4), and wherein the chromium-based coating does not contain chromium carbide. Further is disclosed a method for its production.
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公开(公告)号：US11781232B2
公开(公告)日：2023-10-10
申请号：US17996642
申请日：2021-04-21
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
摘要： An aqueous electroplating bath is disclosed. The aqueous trivalent chromium bath comprises:—trivalent chromium cations in an amount of 0.12-0.276 mol/l,—ammonium ions in an amount of 4.0-6.0 mol/l, and—carboxylate ions in an amount of 2.0-7.4 mol/l, and the molar ratio of trivalent chromium cations to the carboxylate ions is 0.016-0.099, and the pH of the aqueous trivalent chromium bath is 2-6.
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公开(公告)号：US20240150919A1
公开(公告)日：2024-05-09
申请号：US18414020
申请日：2024-01-16
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
摘要： An object comprising a chromium-based coating on a substrate is disclosed, wherein the chromium is electroplated from an aqueous electroplating bath comprising trivalent chromium cations, wherein the chromium-based coating comprises 87-98 weight-% of chromium, 0.3-5 weight-% of carbon, and 0.1-11 weight-% of nickel and/or iron, and wherein the chromium-based coating has a Vickers microhardness value of 1000-2000 HV, and wherein the chromium-based coating does not contain chromium carbide. Further is disclosed a method for its production, and an aqueous electroplating bath.
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公开(公告)号：US20230193495A1
公开(公告)日：2023-06-22
申请号：US17996521
申请日：2021-04-21
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
IPC分类号： C25D3/06
CPC分类号： C25D3/06
摘要： An object comprising a chromium-based coating on a substrate is disclosed. The chromium is electroplated from an aqueous electroplating bath comprising trivalent chromium cations, wherein the chromium-based coating comprises at least one chromium-containing layer, the chromium-based coating does not contain macrocracks, wherein a macrocrack is a crack that extends from the outer surface of the chromium-based coating, through the chromium-based coating, to the substrate, the chromium-based coating has a Vickers microhardness value of 800-1100 HV, and the chromium-based coating exhibits a critical scratch load value (LC2) of at least 80 N in the adhesion test according to ASTM C1624-05 (2015; point 11.11.4.4). Further is disclosed a method for its production.
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公开(公告)号：US10443142B2
公开(公告)日：2019-10-15
申请号：US15111594
申请日：2014-01-15
申请人： Savroc Ltd
发明人： Juha Miettinen , Jussi Räisä
IPC分类号： C25D11/36 , C23C28/00 , C22F1/10 , C22F1/11 , C25D5/14 , C25D3/06 , C25D5/50 , C23C28/02 , C25D3/56 , C23C14/24 , C23C16/44 , C23C16/455 , C23C18/16 , C23C18/32
摘要： To produce a chromium-containing multilayer coating on an object, alternate layers of nickel phosphorus alloy and trivalent chromium are deposited on the object until a desired thickness of coating has been reached. The coated object is then subjected to one or more heat treatments to improve the mechanical and physical properties of the coating and to produce multiphase layers comprising layers containing crystalline Ni and crystalline Ni3P and layers containing crystalline Cr.
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7.发明申请Method for Producing Chromium-Containing Multilayer Coating and a Coated Object 审中-公开生产含铬多层涂层和涂层物体的方法公开(公告)号：US20160333493A1
公开(公告)日：2016-11-17
申请号：US15111594
申请日：2014-01-15
申请人： SAVROC LTD
发明人： Juha Miettinen , Jussi Räisä
IPC分类号： C25D5/14 , C25D3/56 , C25D5/50 , C23C16/455 , C23C18/16 , C23C28/02 , C23C14/24 , C23C16/44 , C25D3/06 , C23C18/32
CPC分类号： C25D5/14 , C23C14/24 , C23C16/44 , C23C16/45525 , C23C18/1653 , C23C18/1692 , C23C18/32 , C23C28/02 , C23C28/021 , C23C28/023 , C23C28/42 , C25D3/06 , C25D3/562 , C25D5/50
摘要： To produce a chromium-containing multilayer coating on an object, alternate layers of nickel phosphorus alloy and trivalent chromium are deposited on the object until a desired thickness of coating has been reached. The coated object is then subjected to one or more heat treatments to improve the mechanical and physical properties of the coating and to produce multiphase layers comprising layers containing crystalline Ni and crystalline Ni3P and layers containing crystalline Cr.
摘要翻译： 为了在物体上生产含铬的多层涂层，将镍磷合金和三价铬的交替层沉积在物体上，直到达到所需的涂层厚度。 然后对涂覆的物体进行一次或多次热处理以改善涂层的机械和物理性能，并产生包含含有结晶Ni和结晶Ni3P的层以及含有结晶Cr的层的多相层。
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公开(公告)号：US20230129051A1
公开(公告)日：2023-04-27
申请号：US17996632
申请日：2021-04-21
申请人： Savroc Ltd
发明人： Jussi Räisä , Arto Yli-Pentti
IPC分类号： C25D3/06
摘要： An object comprising a chromium-based coating on a substrate is disclosed, wherein the chromium is electroplated from an aqueous electroplating bath comprising trivalent chromium cations, wherein the chromium-based coating comprises 87-98 weight-% of chromium, 0.3-5 weight-% of carbon, and 0.1-11 weight-% of nickel and/or iron, and wherein the chromium-based coating has a Vickers microhardness value of 1000-2000 HV, and wherein the chromium-based coating does not contain chromium carbide. Further is disclosed a method for its production, and an aqueous electroplating bath.
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公开(公告)号：US11408088B2
公开(公告)日：2022-08-09
申请号：US17439567
申请日：2020-03-11
申请人： SAVROC LTD
发明人： Jussi Räisä
摘要： An object including a chromium-based coating on a substrate and a method for its production are disclosed. The chromium-based coating having a first layer on the substrate, wherein the first layer has a top surface on the opposite side to the substrate and includes fissures within the first layer, and wherein the material of the first layer is predominantly formed of chromium and chromium carbide; the chromium-based coating further having a second layer on the first layer, the second layer at least partially filling the fissures in the first layer and at least partially covers the top surface of the first layer, wherein the material of the second layer is selected from a group consisting of: chromium oxide, carbon, and a combination of chromium oxide and carbon.
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10.发明授权公开(公告)号：US11371156B2
公开(公告)日：2022-06-28
申请号：US15758912
申请日：2016-09-08
申请人： Savroc Ltd
发明人： Jussi Raisa
摘要： A chromium-based coating including chromium (Cr), carbon (C) and iron (Fe), Cr being electroplated from a trivalent Cr bath. The coating is further includes nickel (Ni) electroplated from the Cr bath having at least 20 mg l−1 Ni cations, in that C is at least partially in the form of at least one chromium carbide compound, in that the coating has been heat-treated at a temperature of 400-1,200° C., and in that the hardness of the coating is at least 1,500 HV on a Vickers microhardness scale as measured according to standard SFS-EN ISO 4516. A method for producing a coating and to a coated object is also disclosed.
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