Anticorrosion packaging system for nuclear power metal parts or equipment
By combining pretreatment, environmental monitoring, atmosphere replacement, and corrosion inhibitor slow-release modules, the corrosion problem of nuclear power metal components in extreme environments has been solved, realizing a highly efficient and intelligent anti-rust packaging system suitable for long-term protection of nuclear power equipment and high-end precision instruments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CNNC NUCLEAR POWER OPERATION MANAGEMENT CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-06-09
AI Technical Summary
Existing rust-proof packaging methods for nuclear power metal components or equipment are insufficiently airtight in extreme environments such as high radiation, high temperature, and high humidity, making it difficult to maintain vacuum levels for long periods, resulting in high corrosion risks and failing to provide effective protection.
It employs a pretreatment module, an environmental monitoring module, an atmosphere replacement module, a packaging module, and a preservative slow-release module. Combined with sensor monitoring, inert gas replacement, and preservative slow release, it achieves dynamic environmental control and intelligent alarm, ensuring that the oxygen content inside the packaging is below 0.1%, and provides multiple layers of protection through a multi-layer composite film.
It achieves long-term and effective rust prevention protection in extreme environments, reduces manual maintenance costs, extends the rust prevention life of metal equipment, and is suitable for stable protection of nuclear power equipment, aerospace components, and high-end precision instruments.
Smart Images
Figure CN121799745B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of nuclear power technology, and specifically relates to a rust-proof packaging system for nuclear power metal components or equipment. Background Technology
[0002] Typically, rust-proof packaging for metal components or equipment in nuclear power plants primarily employs methods such as vacuum sealing, desiccant moisture absorption, and anti-corrosion coatings. These methods, using vacuum sealing and desiccants in combination, aim to reduce the risk of oxidation. However, these storage methods still suffer from problems such as insufficient packaging sealing, the influence of environmental humidity changes, and the difficulty in maintaining vacuum levels long-term. Consequently, metal components may still corrode during long-term storage or transportation. Furthermore, traditional rust-proof packaging methods often cannot provide long-term effective protection in the extreme environments of nuclear power equipment, such as high radiation, high temperature, and high humidity. Therefore, it is necessary to reduce the probability of corrosion of nuclear power plant metal components and extend the shelf life of nuclear power equipment in extreme environments. Summary of the Invention
[0003] To overcome the problems existing in related technologies, a rust-proof packaging system for nuclear power metal components or equipment is provided. The system includes: a pretreatment module, an environmental monitoring module, an atmosphere replacement module, a packaging module, a corrosion inhibitor slow-release module, and an alarm module.
[0004] The pretreatment module is used to pretreat the surface of the items to be stored before storage, thereby removing the oxide layer and contaminants from the surface of the items to be stored, which are nuclear power metal parts or equipment that need to be stored.
[0005] The environmental monitoring module is installed inside the rust-proof packaging. The environmental monitoring module includes a sensor module, a wireless communication module, and a control unit. The sensor module is used to monitor the humidity, oxygen content, and temperature inside the rust-proof packaging. The control unit acquires the data collected by the sensor module at a preset frequency and transmits it to the remote monitoring system through the wireless communication module.
[0006] The atmosphere replacement module is used to fill the rust-proof packaging with inert gas before sealing, so that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions.
[0007] The encapsulation module is used to encapsulate the pre-treated items to be stored and the preservative slow-release module into the rust-proof packaging when the environmental monitoring module detects that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions. The preservative slow-release module is used to slow-release the preservative agent inside.
[0008] If the control unit of the environmental monitoring module determines that the temperature, humidity and oxygen content data collected by the sensor module do not meet the preset environmental monitoring conditions, it will trigger the alarm module to execute an alarm and send alarm information to the remote monitoring system to trigger the remote monitoring system to execute an alarm.
[0009] In one possible implementation, the system employs the following steps to perform atmosphere displacement and sealing treatment on the rust-proof packaging:
[0010] Step 100: The atmosphere replacement module vacuums the rust-proof packaging to remove residual air from inside the packaging.
[0011] Step 101: After step 100, the atmosphere replacement module fills the rust-proof packaging with inert gas to form an inert atmosphere;
[0012] Step 102: After step 101, the environmental monitoring module detects the oxygen concentration inside the rust-proof packaging. If the oxygen concentration inside the rust-proof packaging does not meet the preset conditions, then steps 100 and 101 are repeated until the oxygen concentration inside the rust-proof packaging meets the preset conditions.
[0013] Step 103, final sealing: When the oxygen concentration inside the rust-proof packaging meets the preset conditions, the pre-treated items to be stored and the preservative slow-release module are sealed into the rust-proof packaging using a sealing module.
[0014] In one possible implementation, the rust-proof packaging includes an outer film, a middle film, and an inner film.
[0015] The outer membrane can effectively resist external high temperature and radiation aging; the middle membrane can isolate the penetration of corrosive media; the inner membrane can provide a chemical protective barrier and further reduce the contact between air and metal surface.
[0016] In one possible implementation, the outer membrane material includes PET, PVDF, and XLPE, with added radiation-resistant agents; the middle membrane material includes high-density polymer and aluminum foil, with the high-density polymer material including EVOH, PVA, and coated silica; and the inner membrane material includes LLDPE and CPP. The oxygen permeability of the rust-proof packaging is less than 0.01 cm³ / m²·day·atm.
[0017] In one possible implementation, the preservative slow-release module includes an outer packaging and VCI powder encapsulated within the outer packaging, the outer packaging being made of a moisture-sensitive polymer film;
[0018] When the humidity inside the rust-proof packaging exceeds a set threshold, the outer packaging absorbs moisture, expands, and forms micropores, thereby releasing VCl powder. When the humidity inside the rust-proof packaging does not exceed the set threshold, the micropores of the outer packaging shrink or close, and the release of VCl powder slows down or stops.
[0019] In one possible implementation, the alarm module performs alarms including sound or light alarms, and the remote monitoring system performs alarms by displaying the location information of the problematic rust-proof packaging and current monitoring data.
[0020] In one possible implementation, the packaging module employs ultrasonic welding, vacuum heat sealing, and adhesive coating techniques to achieve multiple sealing treatments at the packaging seal.
[0021] In one possible implementation, the preset oxygen content condition includes: oxygen content less than or equal to 0.1%.
[0022] The beneficial effects of this disclosure are as follows: The system integrates multiple technologies such as rust-proof packaging, intelligent atmosphere control, automatic sealing, environmental monitoring, and slow-release of corrosion inhibitors, achieving comprehensive protection from atmosphere regulation, enhanced sealing, environmental monitoring to slow-release corrosion prevention. The system can combine gas replacement and slow-release of corrosion inhibitors to ensure long-term rust prevention, unaffected by fluctuations in the external environment; it can monitor the internal environment of the packaging in real time and issue alarms in case of abnormalities, reducing manual maintenance costs and improving the safety of nuclear power equipment.
[0023] This disclosed system overcomes the problems of poor sealing, difficult maintenance, and low radiation resistance in existing rust-proof packaging, achieving a more efficient, intelligent, and environmentally friendly protection solution. This system can not only significantly extend the rust-proof life of metal equipment, but also provide stable and reliable protection under extreme conditions such as nuclear power plants, high-temperature and high-humidity environments, and long-distance transportation. It is suitable for fields such as nuclear power equipment, aerospace components, and high-precision instruments. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of a rust-proof packaging system for nuclear power metal components or equipment, as shown in an embodiment of this disclosure. Detailed Implementation
[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0026] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains; the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the term "comprising" and any variations thereof in this disclosure are intended to cover non-exclusive inclusion. Clearly, the embodiments described in this disclosure are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.
[0027] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0028] Figure 1 This is a schematic diagram of a rust-proof packaging system for nuclear power metal components or equipment, as shown in an embodiment of this disclosure. Figure 1 As shown, the system includes: a pretreatment module, an environmental monitoring module, an atmosphere replacement module, an encapsulation module, a preservative slow-release module, and an alarm module.
[0029] The pretreatment module is used to pretreat the surface of the items to be stored before storage, thereby removing the oxide layer and contaminants on the surface of the items to be stored, which helps to improve the protection effect. Pretreatment may include cleaning, degreasing, drying, etc. The items to be stored are nuclear power metal parts or equipment that need to be stored.
[0030] An environmental monitoring module is installed inside the rust-proof packaging. The environmental monitoring module includes a sensor module (the sensor module may include a humidity sensor, an oxygen content sensor, and a temperature sensor; the humidity sensor, oxygen content sensor, and temperature sensor may be set independently or integrated into the same device, which is not limited in this disclosure), a wireless communication module, and a control unit (such as an MCU). The humidity sensor is used to monitor the humidity inside the rust-proof packaging; the oxygen content sensor is used to monitor the oxygen content inside the rust-proof packaging; and the temperature sensor is used to monitor the temperature inside the rust-proof packaging. The control unit acquires and stores the data collected by the sensor module at a preset frequency and transmits it to the remote monitoring system through the wireless communication module.
[0031] The atmosphere replacement module is used to fill the rust-proof packaging with an inert gas (such as nitrogen or argon) before sealing, so that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions, for example, the preset oxygen content conditions are less than or equal to 0.1%.
[0032] The encapsulation module is used to perform multiple sealing treatments at the packaging seal when the environmental monitoring module detects that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions. This is achieved by using ultrasonic welding, vacuum heat sealing, and adhesive coating technology to encapsulate the pre-treated items to be stored and the preservative slow-release module inside the rust-proof packaging. The preservative slow-release module is used to slowly release the preservative agent inside to prevent the seal from failing during long-term storage or transportation.
[0033] The control unit of the environmental monitoring module triggers an alarm when it determines that the data collected by any one or more of the humidity, oxygen, and temperature sensors does not meet the preset environmental monitoring conditions (such as humidity <10%, oxygen content ≤0.1%, and temperature ≥60℃). It can also send an alarm message to the remote monitoring system to trigger an alarm there as well. Alarm activation by the alarm module can include audible or visual alarms, while alarm activation by the remote monitoring system can include displaying the location of the problematic rust-proof packaging and current monitoring data. This allows relevant management personnel to check the packaging status at any time and take intervention measures when necessary, such as refilling or replacing the corrosion inhibitor.
[0034] This disclosed system integrates multiple technologies, including rust-proof packaging, intelligent atmosphere control, automatic sealing, environmental monitoring, and slow-release of preservatives, achieving comprehensive protection from atmosphere conditioning, enhanced sealing, environmental monitoring to slow-release corrosion prevention. Its advantages include:
[0035] Dynamically adjust the packaging environment: By combining gas replacement and slow release of preservatives, long-term rust prevention is ensured and is not affected by fluctuations in the external environment.
[0036] Remote monitoring and intelligent early warning: It can monitor the internal environment of the packaging in real time and issue an alarm when there is an anomaly, reducing manual maintenance costs and improving the safety of nuclear power equipment.
[0037] This disclosed system overcomes the problems of poor sealing, difficult maintenance, and low radiation resistance in existing rust-proof packaging, achieving a more efficient, intelligent, and environmentally friendly protection solution. This system can not only significantly extend the rust-proof life of metal equipment, but also provide stable and reliable protection under extreme conditions such as nuclear power plants, high-temperature and high-humidity environments, and long-distance transportation. It is suitable for fields such as nuclear power equipment, aerospace components, and high-precision instruments.
[0038] In one possible implementation, the rust-proof packaging is subjected to atmosphere displacement and sealing treatment using the following steps:
[0039] Step 100: The atmosphere replacement module evacuates the rust-proof packaging, removing residual air inside and rapidly reducing the oxygen concentration inside the packaging.
[0040] Step 101: After step 100, the atmosphere replacement module fills the rust-proof packaging with inert gas to form an inert atmosphere, which effectively inhibits the oxidation reaction inside the rust-proof packaging.
[0041] Step 102: After step 101, the environmental monitoring module detects the oxygen concentration inside the rust-proof packaging. If the oxygen concentration inside the rust-proof packaging does not meet the preset conditions, steps 100 and 101 are repeated until the oxygen concentration inside the rust-proof packaging meets the preset conditions. Thus, this disclosure employs a vacuum-gas alternation method, repeatedly replacing the gas inside the packaging to ensure that the oxygen content inside the packaging is below 0.1%, effectively inhibiting oxidation reactions inside the rust-proof packaging.
[0042] Step 103, final sealing: When the oxygen concentration inside the rust-proof packaging meets the preset conditions, the pre-treated items to be stored and the corrosion inhibitor slow-release module are sealed into the rust-proof packaging using a sealing module, so that a low-oxygen, high-purity inert atmosphere is formed inside the rust-proof packaging, ensuring that the metal parts will not corrode due to oxidation during storage or transportation.
[0043] Compared with traditional sealed storage methods, the method provided in this disclosure can reduce the oxygen concentration in rust-proof packaging by more than 10 times, effectively extending the rust-proof protection period.
[0044] In one possible implementation, the rust-proof packaging can be made of a high-strength, radiation-resistant multilayer composite film, including an outer film, a middle film, and an inner film.
[0045] The outer membrane effectively resists external high temperatures and radiation aging, ensuring it does not degrade in the complex environment of a nuclear power plant. Materials for the outer membrane include PET (polyethylene terephthalate), PVDF (polyvinylidene fluoride), and XLPE (cross-linked polyethylene). Radiation-resistant agents such as zinc oxide, barium sulfate, or tungsten carbide can also be added to the outer membrane. The middle membrane effectively isolates the penetration of corrosive media such as water vapor and oxygen. The middle membrane consists of a high-density polymer and aluminum foil (high-density polymer and aluminum...). The foil can be arranged in an inside-out or outside-in order. High-density polymeric materials include EVOH (ethylene-vinyl alcohol copolymer), PVA (polyvinyl alcohol), and silica coating. The inner membrane provides an additional chemical protective barrier, further reducing the contact between air and the metal surface, thereby reducing the risk of corrosion. Materials for the inner membrane include LLDPE (linear low-density polyethylene) and CPP (cast polypropylene). In one application scenario, the oxygen permeability of the rust-proof packaging is required to be less than 0.01 cm³ / m²·day·atm, thereby improving the stability and long-term effectiveness of the protective performance.
[0046] The disclosed rust-proof packaging employs a multi-layer sealing process to ensure stability during long-term storage and harsh transportation conditions. The packaging material used is a recyclable, radiation-resistant polymer film, reducing the pollution problems associated with traditional rust-proof packaging.
[0047] In one possible implementation, the corrosion inhibitor slow-release module also has an adaptive adjustment function. The module includes an outer packaging and VCI (volatile corrosion inhibitor) powder encapsulated within the outer packaging. The outer packaging is a bag or interlayer made of a humidity-sensitive polymer film. The polymer film material can be, for example, polyvinyl alcohol, chitosan, hydroxypropyl methylcellulose, or polyacrylic acid. When the humidity inside the corrosion-preventive packaging is below or equal to a set threshold, the micropores of the outer packaging are extremely small and dense, resulting in very low permeability. When the humidity exceeds the set threshold (e.g., 10% RH), the outer packaging absorbs moisture, enhancing molecular chain segment movement and causing the previously tiny micropores to expand, significantly increasing the permeability of the VCI powder through the outer packaging, thereby releasing the VCI powder. As the humidity decreases, the micropores of the outer packaging close or contract, slowing or stopping the release. VCI powder factors can be evenly diffused inside the rust-proof packaging and adhere to the metal surface of the items to be stored, forming a rust-proof protective film that can generally maintain an effective concentration for 12-24 months. The corrosion inhibitor slow-release module can automatically stop releasing the corrosion inhibitor after detecting that the humidity has dropped to a normal level, thus avoiding waste.
[0048] The adaptive adjustment function of the corrosion inhibitor slow-release module enables the rust-proof packaging to have intelligent monitoring and adaptive adjustment capabilities, significantly reducing human intervention and ensuring that the internal environment is always in optimal protective condition, thereby improving the reliability of protection. Furthermore, compared with traditional desiccant moisture absorption rust prevention methods, the adaptive adjustment module of this disclosure can adjust according to changes in the actual storage environment, providing more uniform and longer-lasting rust protection and avoiding metal pitting corrosion caused by excessively high local humidity.
[0049] The system disclosed herein is primarily applied to the long-term storage and transportation of metal components or equipment in nuclear power plants. It is suitable for critical metal structural parts, such as nuclear reactor pressure vessels, cooling system pipes, steam generators, nuclear fuel assemblies, and pump and valve systems, ensuring they are not affected by oxidation or corrosion during storage and transportation. It is also applicable to the protection of metal components in aerospace, military equipment, high-precision manufacturing, and marine engineering equipment. For example, critical components on spacecraft, core transmission structures of high-speed trains, and transmission components of large wind power equipment can all utilize this technology to ensure the functional integrity of the equipment after long-term storage and improve its service reliability.
[0050] In one application example, the system disclosed herein has been verified through standard environmental simulation experiments, demonstrating excellent long-term rust prevention performance. After testing in a high-temperature and high-humidity environment (60°C, 90%RH, 500 hours), the metal sample encapsulated using the system disclosed herein showed no oxidation spots or rust on its surface, and the rust prevention effect was improved by approximately 5 times compared to traditional encapsulation methods (such as vacuum encapsulation and ordinary rust-preventive oil coating) under the same conditions.
[0051] Further atmosphere replacement effect tests show that the vacuum-gas alternating technology used in this system can control the oxygen content inside the packaging to below 0.1%, far lower than traditional packaging (approximately 1%-5%), effectively inhibiting the metal oxidation process. Furthermore, experiments on the slow-release corrosion inhibitor technology demonstrate that during storage, the rust inhibitor release rate intelligently adjusts with environmental changes, ensuring optimal rust prevention on the metal surface even under extreme humidity or temperature fluctuations. This provides superior protection compared to traditional single rust prevention measures (such as single-layer packaging or single inert gas filling).
[0052] Combined with long-term storage simulation tests (2 years), nuclear power metal components packaged using the disclosed system exhibited a corrosion resistance lifespan extended by at least 50% under high temperature, high humidity, and oxygen exposure environments, and significantly reduced repair, replacement, and maintenance costs due to oxidation. These experimental data fully demonstrate the advanced nature and reliability of the rust-proof packaging method of this invention in the field of nuclear power equipment and high-end metal material storage.
[0053] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A rust-proof packaging system for nuclear power metal components or equipment, characterized in that, The system includes: a pretreatment module, an environmental monitoring module, an atmosphere replacement module, an encapsulation module, a preservative slow-release module, and an alarm module; The pretreatment module is used to pretreat the surface of the items to be stored before storage, thereby removing the oxide layer and contaminants from the surface of the items to be stored, which are nuclear power metal parts or equipment that need to be stored. The environmental monitoring module is installed inside the rust-proof packaging. The environmental monitoring module includes a sensor module, a wireless communication module, and a control unit. The sensor module is used to monitor the humidity, oxygen content, and temperature inside the rust-proof packaging. The control unit acquires the data collected by the sensor module at a preset frequency and transmits it to the remote monitoring system through the wireless communication module. The atmosphere replacement module is used to fill the rust-proof packaging with inert gas before sealing, so that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions. The encapsulation module is used to encapsulate the pre-treated items to be stored and the preservative slow-release module into the rust-proof packaging when the environmental monitoring module detects that the oxygen content inside the rust-proof packaging meets the preset oxygen content conditions. The preservative slow-release module is used to slow-release the preservative agent inside. When the control unit of the environmental monitoring module determines that the temperature, humidity and oxygen content data collected by the sensor module do not meet the preset environmental monitoring conditions, it triggers the alarm module to execute an alarm and also sends an alarm message to the remote monitoring system to trigger the remote monitoring system to execute an alarm. The system employs the following steps to perform atmosphere replacement and sealing treatment on the rust-proof packaging: Step 100: The atmosphere replacement module vacuums the rust-proof packaging to remove residual air from inside the packaging. Step 101: After step 100, the atmosphere replacement module fills the rust-proof packaging with inert gas to form an inert atmosphere; Step 102: After step 101, the environmental monitoring module detects the oxygen concentration inside the rust-proof packaging. If the oxygen concentration inside the rust-proof packaging does not meet the preset conditions, then steps 100 and 101 are repeated until the oxygen concentration inside the rust-proof packaging meets the preset conditions. Step 103, final sealing: When the oxygen concentration inside the rust-proof packaging meets the preset conditions, the pre-treated items to be stored and the preservative slow-release module are sealed into the rust-proof packaging using the encapsulation module. Rust-proof packaging includes an outer film, a middle film, and an inner film; The outer membrane can effectively resist external high temperature and radiation aging; the middle membrane can isolate the penetration of corrosive media; the inner membrane can provide a chemical protective barrier and further reduce the contact between air and metal surface; The preservative slow-release module includes an outer packaging and VCI powder encapsulated within the outer packaging, which is made of a moisture-sensitive polymer film. When the humidity inside the rust-proof packaging exceeds a set threshold, the outer packaging absorbs moisture, expands, and forms micropores, thereby releasing VCl powder. When the humidity inside the rust-proof packaging does not exceed the set threshold, the micropores of the outer packaging shrink or close, and the release of VCl powder slows down or stops.
2. The system according to claim 1, characterized in that, The outer membrane is made of PET, PVDF, and XLPE, with added radiation-resistant agents; the middle membrane is made of high-density polymer and aluminum foil, with high-density polymer materials including EVOH, PVA, and coated silicon dioxide; the inner membrane is made of LLDPE and CPP.
3. The system according to claim 1, characterized in that, The oxygen permeability of the rust-proof packaging is less than 0.01 cm³ / m²·day·atm.
4. The system according to claim 1, characterized in that, The alarm module can trigger alarms, including sound or light alarms. The remote monitoring system can trigger alarms by displaying the location information of the problematic rust-proof packaging and the current monitoring data.
5. The system according to claim 1, characterized in that, The packaging module employs ultrasonic welding, vacuum heat sealing, and adhesive coating technologies to achieve multiple sealing treatments at the packaging seal.
6. The system according to claim 1, characterized in that, The preset oxygen content conditions include: oxygen content less than or equal to 0.1%.