Methods of forming composite powder coatings and articles thereof

A composite powder and powder coating technology, applied in coatings, devices for coating liquid on the surface, supporting elements of blades, etc., can solve the problems of reducing ductility, harmful, time-consuming coatings, etc., and achieve the goal of improving manufacturing efficiency Effect

Inactive Publication Date: 2009-05-20
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can be time consuming and detrimental to the substrate or initial coating due to repeated exposure to high curing temperatures, which can lead to loss of properties beneficial to the substrate or coating such as, but not limited to, reduced corrosion resistance, poor Adhesion and reduced ductility

Method used

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  • Methods of forming composite powder coatings and articles thereof
  • Methods of forming composite powder coatings and articles thereof

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Embodiment Construction

[0012] A method of forming a composite powder coating is disclosed herein, which has fewer curing steps than the powder coating. The composite powder coating herein refers to a multilayer powder coating including at least two powder-coated layers cured by a single thermal curing step, wherein adjacent layers include different powder coating compositions. In addition, an article including a composite powder coating produced by the disclosed method is also disclosed, especially an article for a power generation system including a metal substrate, such as a blade on a turbine engine rotor.

[0013] Advantageously, the disclosed coating method minimizes the number of curing steps while still protecting the article from aqueous solution corrosion, particle erosion, slurry erosion, friction corrosion, contamination, and the like. By curing multiple powder coated layers in a single curing step, production efficiency is improved. In addition, the substrate and the first coating experience...

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Abstract

A method of forming a composite powder coating comprises depositing multiple layers of a powder coating composition onto a substrate, wherein adjacent layers are formed of a different powder coating composition; and curing the multiple layers of the powder coating composition in a single thermal curing step. The layers can be used to protect power generation equipment from aqueous corrosion, particle erosion, slurry erosion, fretting, and fouling.

Description

Technical field [0001] The present disclosure relates to a method of forming a composite powder coating and its products. Background technique [0002] In power generation systems, multilayer powder coatings (ie, composite coatings) can be used to protect the substrate from aqueous solution corrosion, particle erosion, slurry erosion, friction corrosion, pollution, etc. Multiple layers are generally required to obtain all the required performance. To form multiple layers, each layer is cured before the next coating is applied. This can be time-consuming and harmful to the substrate or initial coating due to repeated exposure to high curing temperatures, which can lead to the loss of properties beneficial to the substrate or coating, such as but not limited to reduced corrosion resistance, poor Adhesion and reduced ductility. In power generation systems, these coatings provide functional benefits; therefore, layer integrity is important to performance. [0003] The short curing ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/36B05D7/24B05D3/00B05D7/14B05D1/00F01D5/12
CPCB05D7/582B05D7/542B05D2451/00B05D2401/32
Inventor T·J·穆特V·K·帕里克
Owner GENERAL ELECTRIC CO
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