Method for coating an object by means of a multilayer system with a nickel-phosphorus alloy

Patent metadata

Field	Value
Publication number	US-10837117-B2
Application number	US-201816166676-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Apr 22, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A method for coating an article, wherein a surface of the article is at least partially coated with a coating that has a multiplicity of layers, wherein at least one layer of the coating is made of a nickel phosphorus alloy and wherein a mass fraction of the phosphorus in the nickel phosphorus alloy is at least 8%.

First claim

What is claimed is:

1. A method for coating an article, the method comprising:
applying a plurality of layers to at least part of a surface of the article, the plurality of layers together forming a coating on the at least part of the surface of the article;
wherein a first layer of the plurality of layers applied to the article is made of copper, a second layer of the plurality of layers is made of bright nickel, semi-bright nickel or matte nickel, a third layer of the plurality of layers is made of a nickel phosphorus alloy, and a fourth layer of the plurality of layers, which is applied directly to the third layer, is made of chromium, and
wherein a mass fraction of the phosphorus in the nickel phosphorus alloy is at least 8%, and wherein the third layer made of the nickel phosphorus alloy is a fully continuous layer.

2. The method according to claim 1 , wherein the article is made of copper, zinc, aluminum, iron, or plastic, or an alloy that includes copper, zinc, or steel.

3. The method according to claim 1 , wherein the chromium of the fourth layer is deposited from a hexavalent or trivalent chromium electrolyte.

4. The method according to claim 1 , wherein at least the third layer made of the nickel phosphorus alloy is applied electrolytically.

5. The method according to claim 1 , wherein a fifth layer of the plurality of layers is applied on the fourth layer, the fifth layer being produced from an amorphous carbon layer (DLC).

Assignees

• Grohe Ag

Inventors

• Zimmermann Christian
• Bobzien Mark

Classifications

• C25D3/562 Primary

  containing more than 50% by weight of iron or nickel or cobalt · CPC title

• C25D5/14 Primary

  two or more layers being of nickel or chromium, e.g. duplex or triplex layers · CPC title

• C25D5/627

  Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance · CPC title

• C25D5/617

  Crystalline layers · CPC title

• C25D5/611

  Smooth layers · CPC title