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Multilayer coating

  • US 10,577,693 B2
  • Filed: 04/29/2016
  • Issued: 03/03/2020
  • Est. Priority Date: 04/30/2015
  • Status: Active Grant
First Claim
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1. A method of manufacturing an aircraft component with a multilayer coating, the method comprising:

  • (1) applying a low hydrogen embrittlement ZnNi layer directly to a substrate material, wherein the substrate material is steel;

    (2) carrying out a first heat treatment in a temperature range from 135-300°

    C. for a time period of at least 23 hours;

    (3) passivating the low hydrogen embrittlement ZnNi layer;

    (4) applying a metal-pigmented top coat to the low hydrogen embrittlement ZnNi layer, wherein the top coat comprises a mixture of zinc flake layers and aluminum flake layers which are connected by an inorganic matrix; and

    (5) carrying out a second heat treatment in a temperature range of between 180 and 200°

    C. for a time period of at least 10 minutes.

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