Metal Plate Coated Stainless Material and Method of Producing Metal Plate Coated Stainless Material

Patent metadata

Field	Value
Publication number	US-2016340786-A1
Application number	US-201415023323-A
Country	US
Kind code	A1
Filing date	Sep 11, 2014
Priority date	Sep 20, 2013
Publication date	Nov 24, 2016
Grant date	—

Abstract

There is provided a metal plate coated stainless material ( 100 ) which includes a stainless steel sheet ( 10 ) having formed thereon a passivation film ( 11 ) having a Cr/O value in the range of 0.05 to 0.2 and a Cr/Fe value in the range of 0.5 to 0.8 at the surface as measured by an Auger electron spectroscopy analysis and a metal plated layer ( 20 ) formed on the passivation film ( 11 ) of the stainless steel sheet ( 10 ), in which the metal plated layer ( 20 ) is a plated layer formed from any one metal selected from among Ag, Pd, Pt, Rh, Ru, Cu, Sn and Cr, or an alloy of these metals.

First claim

What is claimed is:

1 . A metal plate coated stainless material comprising:
a stainless steel sheet formed with a passivation film having a surface of which a Cr/O value is within a range of 0.05 to 0.2 and a Cr/Fe value is within a range of 0.5 to 0.8 when measured by Auger electron spectroscopy analysis; and a metal plated layer formed from any one metal selected from among Ag, Pd, Pt, Rh, Ru, Cu, Sn and Cr, or an alloy composed of at least two or more metals selected from among these metals on the passivation film of the stainless steel sheet.

2 . The metal plate coated stainless material according to claim 1 , wherein the metal plated layer has a coverage of 95% or more.

3 . A method of producing a metal plate coated stainless material, the method comprising:
immersing a stainless steel sheet in a sulfuric acid aqueous solution; and forming, on the stainless steel sheet, a metal plated layer formed from any one metal selected from among Ag, Pd, Pt, Rh, Ru, Cu, Sn and Cr, or an alloy composed of at least two or more metals selected from among these metals, wherein the stainless steel sheet is immersed in the sulfuric acid aqueous solution to satisfy Expression (1) below:
0.6×10 6 ≦x 2 ·( y− 40) 2 ·√{square root over (z)}≦ 3.0×10 6   (1)

where x represents a sulfuric acid concentration [vol %] of the sulfuric acid aqueous solution (20≦x≦25), y represents a temperature [° C.] of the sulfuric acid aqueous solution, and z represents an immersion time [seconds] when the stainless steel sheet is immersed in the sulfuric acid aqueous solution.

4 . A method of producing a gold plate coated stainless material, the method comprising:
immersing a stainless steel sheet in a sulfuric acid aqueous solution so as to form a passivation film on the stainless steel sheet, the passivation film having a surface of which a Cr/O value is within a range of 0.05 to 0.2 and a Cr/Fe value is within a range of 0.5 to 0.8 when measured by Auger electron spectroscopy analysis; and forming, on the stainless steel sheet, a metal plated layer formed from any one metal selected from among Ag, Pd, Pt, Rh, Ru, Cu, Sn and Cr, or an alloy composed of at least two or more metals selected from among these metals.

Assignees

• Toyota Kohan Co Ltd
• Toyo Kohan Co Ltd

Inventors

• Mukai Nobuaki
• Yoshida Takahiro

Classifications

• B32B15/013

  one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium · CPC title

• C23C18/1834

  Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers · CPC title

• C23C18/31

  Coating with metals · CPC title

• C23C18/48

  Coating with alloys · CPC title

• B32B15/018

  one layer being formed of a noble metal or a noble metal alloy · CPC title