Anticorrosion Coating Compaction With Water-Soluble Particles

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Solution Overview

Problem

Conventional anticorrosion coatings for turbomachine parts, particularly turbine and compressor shafts, face issues with compaction media like corundum or glass beads becoming incrusted and causing damage, and the absence of compaction reduces their effectiveness, necessitating multiple layers and complex thickness control.

Innovation Solution

A method using water-soluble particles, such as sodium hydrogen carbonate, with low hardness and specific projection parameters to compact the coating, ensuring densification without media incrustation and maintaining electrical conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional compaction media (corundum or glass beads) are used to compact the coating, then the paint layer becomes dense and electrically conductive, but the media become incrusted on the surface and may be released later causing damage to turbomachine parts

Engineering Contradiction:

Improveanticorrosion propertiesVSAvoidmedia incrustation and release damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses water-soluble particles as a temporary, disposable compaction medium that performs its function during application and then dissolves harmlessly. These particles are projected onto the wet paint layer to provide compaction action, then washed away with water, leaving no harmful residues on the turbine or compressor shafts.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The water-soluble particles act as an intermediary substance between the compaction mechanism and the paint layer. They transfer the compaction action effectively while being easily removable through water washing, thus mediating the process without causing the harmful incrustation issue of traditional media.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If compaction is skipped to avoid media incrustation problems, then the paint layer remains easier to apply, but the anticorrosion properties are considerably reduced

Engineering Contradiction:

Improveapplication simplicityVSAvoidanticorrosion properties

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The water-soluble particles provide the necessary compaction action during application and then dissolve completely, eliminating the need for complex removal procedures. This disposable approach maintains anticorrosion properties while keeping the process simple and clean.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the physical-chemical parameters of the compaction medium by using water-soluble particles instead of traditional hard media. This parameter change allows the medium to perform compaction functionally and then be easily removed through water washing, achieving both effective compaction and operational simplicity.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the paint layer is not compacted, then the application process is simpler and faster, but multiple layers must be applied manually to limit porosities, increasing application time and preparing parts

Engineering Contradiction:

Improveapplication speedVSAvoidcoating thickness control

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The water-soluble particles enable effective compaction in a single layer application, eliminating the need for multiple manual layers. The particles provide the necessary mechanical action to densify the coating while being easily removed, achieving both speed and precision.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

By changing the compaction medium to water-soluble particles, the patent enables better control of coating density and thickness in a single application. The particles' unique properties allow for optimized compaction parameters that improve both productivity and manufacturing precision.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The method achieves a dense, electrically conductive, and corrosion-resistant coating with minimal thickness loss, suitable for complex geometries, reducing operational risks and simplifying application processes.

Implementation Method 1

A method for compacting an anticorrosion coating comprises a step of projecting water soluble particles

Methodology Applied

Scientific EffectMechanical impact: Impact Force

Implementation Method 2

projecting water soluble particles... to compact the coating, ensuring densification without media incrustation

Methodology Applied

Scientific EffectSolubility: Solvation

Data Source

PatentUS12465946B2Method for compacting an anticorrosion coating

Publication Date: 2025.11.11 SAFRAN AIRCRAFT ENGINES SAS

AI summary

A method for compacting an anticorrosion coating includes projecting water soluble particles.