Anti-Corrosive Turbine Part Coating Compaction With Sublimating Ice
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Solution Overview
Problem
Mechanical parts, especially those in aircraft turbine engines, face significant corrosion issues due to environmental constraints and mechanical stresses, with existing anti-corrosive paints being either ineffective without compacting or posing risks from embedded hard particles during the compacting process, which can damage other engine components and reduce protection when not properly applied.
Innovation Solution
A method using solid ice particles to densify and make anti-corrosive paint electrically conductive, eliminating the need for embedded hard particles by sublimating upon impact, thus preserving the paint's integrity and allowing for automated application, reducing production time and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hard particles (corundum, glass balls) are used for compacting the paint, then the paint is densified and made electrically conductive, but hard particles become embedded in the paint surface and can be discharged at high speed, damaging other engine components
Solution Approach 1:
The patent changes the physical state parameter of the compacting particles from solid hard particles to solid ice particles that sublime upon impact. This parameter change allows the paint to be compacted and densified while eliminating the harmful effect of embedded hard particles, as the ice particles transform into vapor and cannot become embedded or discharged
Solution Approach 2:
The patent utilizes the phase transition of ice particles from solid to vapor (sublimation) upon impact with the paint surface. This phase transition enables the compacting function while eliminating the harmful embedding effect, as the particles disappear into vapor form after delivering their compacting action
2Object-affected harmful factors
If the paint layer is not compacted, then particle discharge damage is avoided, but the paint layer remains porous and provides only limited barrier protection with reduced anti-corrosive effectiveness
Solution Approach 1:
By changing the compacting particles from hard solids to sublimable ice particles, the patent achieves paint densification without the harmful effects of embedded particles. The ice particles compact the paint porosity while sublimating, leaving no harmful residues
Solution Approach 2:
The patent converts the typically harmful effect of particle impact (embedding and damage) into a beneficial effect by using ice particles that sublime. The harmful embedding is transformed into a beneficial temporary presence that achieves compacting, then disappears harmlessly through sublimation
3Reliability
If manual application of multiple paint layers is used to reduce porosity, then anti-corrosive protection is improved, but production time increases and controlling layer thickness on complex parts remains difficult
Solution Approach 1:
The patent replaces the mechanical process of applying multiple thick paint layers with a physical-chemical process of compacting a single layer using sublimating ice particles. This substitution achieves equivalent or superior porosity reduction without the time-consuming multi-layer application process
Solution Approach 2:
The patent applies preliminary compacting action to a single paint layer before it fully cures, using ice particles to densify the structure. This preliminary action achieves the porosity reduction that would otherwise require multiple layers and repeated drying/curing cycles
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 effectively increases the paint's resistance to corrosion, prevents particle discharge, and maintains the paint's physical and cosmetic integrity, providing long-lasting protection against corrosion without the risks associated with embedded particles.
Implementation Method 1
The solid particles are sublimated after impact on the paint
Data Source
AI summary
A method of compacting an anti-corrosive paint comprising metal particles and covering a mechanical part such as a turbine engine part, the method comprising a step of at least one spraying of solid ice particles on the part so as to densify and to make the paint electrically conductive.