Fluoride Spray Coating Ion Implantation for Corrosion Resistance
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Solution Overview
Problem
Conventional fluoride spray coatings are chemically unstable when exposed to halogen gases, leading to corrosion and color changes, and existing methods to improve stability, such as heat treatment, increase production costs and reduce efficiency.
Innovation Solution
A method of ion implanting F-containing gases, oxygen, or inert gases onto a white fluoride spray coating to form a black ion-implanted layer, which enhances corrosion resistance and plasma erosion resistance while allowing for visual identification and improved thermal radiation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat treatment is applied to improve chemical stability of fluoride spray coating, then corrosion resistance is improved, but production cost increases and production efficiency decreases
Solution Approach 1:
The patent applies ion implantation during the spray coating process itself to pre-establish a stable fluoride layer, eliminating the need for subsequent heat treatment. This preliminary action achieves chemical stability at the time of coating formation, maintaining production efficiency while ensuring corrosion resistance.
Solution Approach 2:
The patent replaces the thermal field (heat treatment) with an ion field (ion implantation) to achieve chemical stabilization. By using ion bombardment instead of thermal processing, the method achieves comparable or superior corrosion resistance without the time and energy costs associated with heat treatment.
2Reliability
If heat treatment is applied to improve chemical stability of fluoride spray coating, then corrosion resistance is improved, but production cost increases
Solution Approach 1:
The patent combines the coating formation process with the stabilization process by integrating ion implantation into the spray coating operation. This merging of processes achieves both coating deposition and chemical stabilization in a single step, eliminating the separate heat treatment工序 and associated costs.
Solution Approach 2:
The patent replaces the thermal field (heat treatment) with an ion field (ion implantation) to achieve chemical stabilization. By using ion bombardment instead of thermal processing, the method achieves comparable or superior corrosion resistance without the time and energy costs associated with heat treatment.
3Difficulty of detecting and measuring
If ion implantation is applied to blacken the coating surface, then visual identification capability is improved, but coating structure is modified
Solution Approach 1:
The patent intentionally uses ion implantation to induce color change from white to black in the fluoride coating. This color transformation provides excellent visual identification capability for monitoring coating integrity and wear, while the ion implantation simultaneously enhances the chemical stability of the coating structure.
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 ion-implanted layer changes the appearance of the coating to black, maintaining corrosion and plasma erosion resistance, allowing for easier identification of wear and improving design, while maintaining the chemical and physical properties of the fluoride coating.
Implementation Method 1
a method of ion implanting F-containing gases, oxygen, or inert gases onto a white fluoride spray coating to form a black ion-implanted layer
Data Source
AI summary
This invention is to provide a fluoride spray coating covered member having excellent resistance to halogen corrosion and resistance to plasma erosion and displaying identification symbols such as letters, numeric characters, graphic, pattern, firm name, serial number and so on. In the invention, one or more implanting gases selected from fluorine-containing gas, oxygen gas and inert gas are ion-implanted onto a white fluoride spray coating formed on a surface of a substrate, whereby at least a part of the surface of the white fluoride spray coating is changed into a black color to form a black ion-implanted layer.