Anti-Corrosion Coating Compaction Using Water-Soluble Particles
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Solution Overview
Problem
Existing anti-corrosion coatings for high-strength steels, particularly in turbomachinery, face issues with compaction media embedding and releasing during operation, leading to reduced corrosion protection and potential damage, along with increased application time and coating porosity.
Innovation Solution
A compaction process using water-soluble sodium hydrogen carbonate particles with a hardness less than 9 on the Mohs scale, projected at a pressure of 1.5-4 bar, preferably 2 bar, and at angles between 45° and 90°, followed by a rinsing step to remove residues, ensuring a dense and electrically conductive coating without compromising integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional compaction media (corundum or glass beads) are used to compact the paint layer, then the paint layer becomes dense and electrically conductive, but the compaction media become embedded in the surface and may be released during operation, causing damage to turbomachine parts
Solution Approach 1:
The patent uses water-soluble particles as compaction media that are temporarily embedded in the paint layer during compaction, then dissolved and removed through water rinsing. These particles serve their compaction function and are then discarded, eliminating the problem of persistent embedded media that could damage turbomachine parts during operation.
Solution Approach 2:
The water-soluble particles act as an intermediary compaction medium that facilitates the compaction process by providing the necessary mechanical impact to densify the paint layer, then disappears through water solubility, leaving no harmful residues embedded in the coating.
2Reliability
If compaction is performed on sensitive parts like turbine or compressor shafts, then the paint layer achieves good anti-corrosion properties, but the compaction media may be released during operation, damaging the parts
Solution Approach 1:
The water-soluble particles are used as a disposable compaction medium that completes its function during the compaction process and is then removed through water rinsing. This eliminates the harmful effect of persistent embedded media on sensitive turbomachine parts while maintaining effective corrosion protection.
3Productivity
If the paint layer is not compacted, then the application process is simpler and faster, but the coating becomes porous and requires manual application in two coats to minimize porosity, increasing application time
Solution Approach 1:
The water-soluble particle compaction process automatically densifies the paint layer through the impact of projected particles, creating a compacted surface with reduced porosity. This self-compacting mechanism eliminates the need for manual multi-coat application and achieves both speed and quality improvement simultaneously.
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 process achieves a dense, uniform, and smooth coating with minimal thickness loss, enhancing corrosion and temperature resistance while preventing media release, suitable for complex geometries and sensitive parts like turbine shafts.
Implementation Method 1
a step of projecting water-soluble particles based on sodium hydrogen carbonate and having a particle size between 70 μm and 200 μm
Implementation Method 2
This compaction brings the metallic particles into contact with the surface, making the paint layer dense and electrically conductive
Implementation Method 3
a step of projecting water-soluble particles based on sodium hydrogen carbonate
Data Source
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AI summary
One aspect of the invention relates to a method for compacting (100) an anti-corrosion coating (110), characterized in that it comprises a step (101) of spraying water-soluble particles (130).