Multilayer coating
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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Abstract
A multilayer coating obtained by carrying out the steps of (1) applying a ZnNi layer to a substrate material, in particular to a steel; (2) carrying out a first heat treatment in a temperature range from 135-300° C., preferably from 185-220° C., for a time period of at least 4 hours, preferentially of at least 23 hours; (3) applying a metal-pigmented top coat to the ZnNi layer; and (4) carrying out a second heat treatment in a temperature range from 150-250° C., preferably from 180-200° C., for a time period of at least 10 minutes, prefer-ably of at least 20 minutes, preferentially of at least 30 minutes.
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Citations
3 Claims
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1. A method of manufacturing an aircraft component with a multilayer coating, the method comprising:
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(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. - View Dependent Claims (2, 3)
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Specification