# US 11,279,112 B2 · Coating laminated body and method for producing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,279,112 B2 - Document ID: US11279112B2 - Status: Granted - Kind: B2 - Application number: 16/650,626 - Filed: 2018-05-08 - Published: 2020-08-13 - Granted: 2022-03-22 - Earliest claimed: 2017-09-27 - Assignees: Hitachi, Ltd. - Applicants: Hitachi, Ltd. - Inventors: Toshinori Kawamura; Hiroshi Kanemoto - Web page: https://patentgrep.com/patent/US11279112B2 ## CPC - B32B 15/01: all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} - C25D 5/14: two or more layers being of nickel or chromium, e.g. duplex or triplex layers - C25D 5/50: by heat-treatment - C25D 5/611: {Smooth layers} - C25D 5/617: {Crystalline layers} - B32B 15/04: comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)} - C25D 3/562: {containing more than 50% by weight of iron or nickel or cobalt} - Y10T 428/12049: Nonmetal component - Y10T 428/12069: Plural nonparticulate metal components - Y10T 428/12076: Next to each other - Y10T 428/12083: Nonmetal in particulate component - Y10T 428/12118: Nonparticulate component has Ni-, Cu-, or Zn-base - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An object of the invention is to provide a coating laminated body in which coatings not containing hexavalent chromium which is an environmental concern material, and excellent in corrosion resistance and wear resistance are laminated on a base material, and to provide a method for producing the same. The coating laminated body according to the invention is a laminated body in which a multiple-layer coating is laminated on a base material. The multiple-layer coating includes: a plurality of layers of S-containing Ni alloy coatings; and a sulfur concentrated layer that is formed between the plurality of layers of S-containing Ni alloy coatings and has an S concentration higher than an S concentration of the S-containing Ni alloy coatings. Each of the plurality of layers of S-containing Ni alloy coatings has a Ni concentration of 90% or more by mass, and a difference in Ni concentration between the coatings is within 1% by mass. ## Claims ### Claim 1 A coating laminated body comprising: a base material; and a multiple-layer coating laminated on the base material, wherein the multiple-layer coating includes a plurality of layers of sulfur-containing nickel alloy coatings; and a sulfur concentrated layer that is formed between each of the plurality of layers of sulfur-containing nickel alloy coatings, and has a sulfur concentration higher than a sulfur concentration of the sulfur-containing nickel alloy coatings, each of the plurality of layers of sulfur-containing nickel alloy coatings has a nickel concentration of 90% or more by mass and has a thickness of 300 nm or more and 1000 nm or less, and a difference in the nickel concentration between the sulfur-containing nickel alloy coatings is within 1% by mass, the multiple-layer coating has a Vickers hardness of 800 HV or more, and the plurality of layers of sulfur-containing nickel alloy coatings is 10 layers or more. ### Claim 2 (depends on 1) The coating laminated body according to claim 1, wherein the sulfur concentration of the sulfur concentrated layer is 102% or more of the sulfur concentration of the plurality of sulfur-containing nickel alloy coatings. ### Claim 3 (depends on 1) The coating laminated body according to claim 1, wherein each of the plurality of layers of sulfur-containing nickel alloy coatings has an identical thickness. ### Claim 4 (depends on 1) The coating laminated body according to claim 1, wherein each of the plurality of layers of sulfur-containing nickel alloy coatings further contains phosphorus. ### Claim 5 (depends on 1) The coating laminated body according to claim 1, wherein each of the plurality of layers of sulfur-containing nickel alloy coatings has an average crystal grain size of 8 nm or less. ### Claim 6 (depends on 1) A method for producing the coating laminated body according to claim 1, comprising: a nickel alloy coating plating treatment step being performed for a plurality of times; and an annealing treatment step, wherein a plating treatment stop step is interposed between the plurality of nickel alloy coating plating treatment steps, both of the nickel alloy coating plating treatment step and the plating treatment stop step being conducted by using a single kind of plating solution, and wherein the annealing treatment step is performed at an annealing temperature of 300° C. or less. ### Claim 7 (depends on 1) A coating laminated body according to claim 1, comprising: a base material; and a multiple-layer coating laminated on the base material, wherein the multiple-layer coating includes a plurality of layers of sulfur-containing nickel alloy coatings; and a sulfur concentrated layer that is formed between each of the plurality of layers of sulfur-containing nickel alloy coatings, and has a sulfur concentration higher than a sulfur concentration of the sulfur-containing nickel alloy coatings, each of the plurality of layers of sulfur-containing nickel alloy coatings has a nickel concentration of 90% or more by mass and has a thickness of 300 nm or more and 1000 nm or less, and a difference in the nickel concentration between the sulfur-containing nickel alloy coatings is within 1% by mass, and wherein the multiple-layer coating has a Vickers hardness of 849 HV or more, and the multiple-layer coating has a wear resistance of 3.52 m/μg or more. ### Claim 8 A coating laminated body comprising: a base material; and a multiple-layer coating laminated on the base material, wherein the multiple-layer coating includes a plurality of layers of sulfur-containing nickel alloy coatings; and a sulfur concentrated layer that is formed between each of the plurality of layers of sulfur-containing nickel alloy coatings, and has a sulfur concentration higher than a sulfur concentration of the sulfur-containing nickel alloy coatings, each of the plurality of layers of sulfur-containing nickel alloy coatings has a nickel concentration of 90% or more by mass and has a thickness of 300 nm or more and 1000 nm or less, and a difference in the nickel concentration between the sulfur-containing nickel alloy coatings is within 1% by mass, the multiple-layer coating has a Vickers hardness of 800 HV or more, and wherein the sulfur concentrated layer is a layer of sulfur-containing organic compound. ### Claim 9 (depends on 1) The coating laminated body according to claim 1, wherein an adhesion layer is provided between the base material and the sulfur-containing nickel alloy coating.