Alloy plate coated material and method of producing alloy plate coated material

Patent metadata

Field	Value
Publication number	US-10525670-B2
Application number	US-201816000355-A
Country	US
Kind code	B2
Filing date	Jun 5, 2018
Priority date	Oct 28, 2013
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

An alloy plate coated material including a base material and an alloy plate layer which is formed on the base material to constitute an outermost layer and is formed from a M1-M2-M3 alloy. M1 is at least one element selected from Ni, Fe, Co, Cu, Zn and Sn. M2 is at least one element selected from Pd, Re, Pt, Rh, Ag and Ru. M3 is at least one element selected from P and B. The alloy plate layer has a molar ratio of M1 to M2 (M1/M2) of 0.005 to 0.5.

First claim

What is claimed is:

1. A method of producing an alloy plate coated material, the method comprising:
immersing a stainless steel material into a sulfuric acid aqueous solution to form a passivation film at a surface of the stainless steel material;
forming an alloy plate layer formed from a M1-M2-M3 alloy by electroless plating on the passivation film formed on the surface of the stainless steel material,
wherein in regard to the M1-M2-M3 alloy, M1 is at least one element selected from Ni, Fe, Co, Cu, Zn and Sn; M2 is at least one element selected from Pd, Re, Pt, Rh, Ag and Ru; and M3 is at least one element selected from P and B, and
wherein the alloy plate layer has a molar ratio of M1 to M2 (M1/M2) is 0.005 to 0.5.

2. The method of producing an alloy plate coated material according to claim 1 , wherein the alloy plate layer has a glass transition point.

3. The method of producing an alloy plate coated material according to claim 1 , wherein a ratio of each element in the M1-M2-M3 alloy is that M1 is 20 to 50 at %, M2 is 30 to 50 at %, and M3 is 20 to 30 at %.

4. The method of producing an alloy plate coated material according to claim 1 , wherein the thickness of the alloy plate layer is 5 to 100 nm.

5. The method of producing an alloy plate coated material according to claim 1 , wherein the passivation film has a Cr/O value (molar ratio of Cr/O) in the range of 0.09 to 0.20 and a Cr/Fe value (molar ratio of Cr/Fe) in the range of 0.55 to 0.80 at the surface as measured by an Auger electron spectroscopy analysis.

6. The method of producing an alloy plate coated material according to claim 1 , wherein the alloy plate layer has a structure which contains an amorphous portion of the M1-M2-M3 alloy.

7. The method of producing an alloy plate coated material according to claim 1 , wherein in regard to the alloy plate layer, the diffraction profile analyzed by a grazing incidence X-ray diffraction method using an X-ray diffractometer has a shape which has a halo originating from an amorphous structure.

8. The method of producing an alloy plate coated material according to claim 1 , further comprising:
forming a modifying layer between the stainless steel sheet and the alloy plate layer.

9. The method of producing an alloy plate coated material according to claim 1 , wherein the alloy plate layer is formed from Ni—Pd—P alloy, Ni—Pt—P alloy, Co—Pd—P alloy or Co—Ag—P alloy.

Assignees

• Toyo Kohan Co Ltd

Inventors

• Mukai Nobuaki
• Tsuruda Tomoyuki
• Yoshida Takahiro

Classifications

• H01M8/0228

  in the form of layered or coated products · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• C23C18/50 Primary

  with alloys based on iron, cobalt or nickel · CPC title

• H01M8/0208

  Alloys · CPC title

• C23C22/50

  Treatment of iron or alloys based thereon · CPC title