Laminated body having corrosion-resistant coating, and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2018264782-A1
Application number	US-201615571208-A
Country	US
Kind code	A1
Filing date	Apr 22, 2016
Priority date	May 7, 2015
Publication date	Sep 20, 2018
Grant date	—

Abstract

An object of the present invention is to provide a product excellent in corrosion resistance and abrasion resistance. In order to achieve the above object, a laminated body according to the invention includes a substrate and a coating formed on the surface of the substrate, in which the coating includes repeated unit structures each composed of a first layer whose main component is Ni and a second layer whose main component is a metal whose electrode potential is baser than that of Ni.

First claim

1 . A laminated body comprising a substrate and a coating formed on a surface of the substrate, wherein
the coating includes repeated unit structures each composed of a first layer whose main component is Ni and a second layer whose main component is a metal whose electrode potential is baser than that of Ni.

2 . The laminated body according to claim 1 , wherein
an outermost layer of the coating is the first layer.

3 . The laminated body according to claim 2 , wherein
the first layer is composed of a plurality of layers having different Ni content ratios.

4 . The laminated body according to claim 2 , wherein
the first layer is composed of a plurality of layers having different Ni crystal grain sizes.

5 . The laminated body according to claim 1 , wherein
the metal whose electrode potential is baser than that of Ni is any one of Zn, Fe, and Al.

6 . The laminated body according to claim 1 , wherein
a content ratio of Ni in the first layer is 80 wt % or more.

7 . The laminated body according to claim 1 , wherein
a content ratio of Ni in the first layer is 80 wt % or more, and a content ratio of Zn in the second layer is 80 wt % or more.

8 . The laminated body according to claim 1 , wherein
a thickness of the first layer and a thickness of the second layer are 1 μm or less.

9 . The laminated body according to claim 1 , wherein
the first layer or the second layer contains at least one of an oxide, a carbide, a nitride, and an organic polymer.

10 . The laminated body according to claim 1 , wherein
the first layer or the second layer contains any one of WO, TiO 2 , Al 2 O 3 , SiO 2 , SiC, BN, and a fluorine-based resin.

11 . The laminated body according to claim 1 , wherein
the first layer or the second layer contains P or B as an additive.

12 . The laminated body according to claim 1 , wherein
an alloy layer of Ni and a metal whose electrode potential is baser than that of Ni is formed between the first layer and the second layer.

13 . A method for manufacturing a laminated body comprising a substrate and a coating formed on a surface of the substrate, wherein
the coating includes repeated unit structures each composed of a first layer whose main component is Ni and a second layer whose main component is a metal whose electrode potential is baser than that of Ni, wherein the method comprises: a first plating step of forming the first layer on the substrate or the second layer; and a second plating step of forming the second layer on the first layer, and in the first plating step, plating is performed by using a plating solution whose temperature is 25° C. or lower and under a condition in which a current density is higher than that in the second plating step.

Assignees

• Hitachi Ltd

Inventors

• Kanemoto Hiroshi
• Mabuchi Katsumi
• Nakano Hiroshi

Classifications

• B32B2311/22

  Nickel or cobalt · CPC title

• C23C28/34

  including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates · CPC title

• C25D21/12

  Process control or regulation (controlling or regulating in general G05) · CPC title

• B32B15/01 Primary

  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)} · CPC title

• C23C28/42

  characterized by the composition of the alternating layers · CPC title