Method for verifying effectiveness and validity period of mildew preventive for airplane in humid and hot environment

Abstract

The invention discloses a method for verifying the effectiveness and validity period of a mildew preventive for airplanes in a humid and hot environment, which comprises the following steps: step 1, carrying out an effectiveness test on the mildew preventive, namely acquiring bacterial strains by collecting microorganisms on the surface of the airplanes in the humid and hot environment, and evaluating the comprehensive mildew-proof effect of the mildew preventive; in addition, the broad-spectrum strong mildew resistance of the mildew preventive to various strains in the humid and hot environment is obtained; and step 2, carrying out validity period test on the mildew preventive, namely evaluating the validity period of the mildew preventive by adopting an accelerated corrosion test, and determining the use validity period of the mildew preventive by combining a monitoring result of chemical components of the mildew preventive after the test by an infrared spectrum. According to the method, the problems that the coverage of an existing mould-resistant grade test is insufficient and the subjectivity of an obtained test result is relatively strong in mould-proof effect verification of a mould-proof product are solved.

Description

Technical Field

[0001] This invention relates to, but is not limited to, the field of corrosion protection and control technology for aerospace materials, and particularly to a method for verifying the effectiveness and shelf life of an antifungal agent for aircraft in humid and hot environments. Background Technology

[0002] In the aviation industry, mold prevention in humid and hot environments is crucial for flight safety and system reliability. Mold easily proliferates in aircraft composite materials (such as carbon fiber / glass fiber), metal structures (such as aluminum alloys), and fuel / hydraulic systems under high temperature and humidity conditions. Its metabolic products (such as organic acids and enzymes) can corrode metals and degrade non-metallic materials, leading to decreased structural strength or functional failure. Mold inhibitors can be divided into two main categories: inorganic and organic. Generally, considering the usage methods for field maintenance, organic mold inhibitors are typically chosen for maintenance of aviation equipment.

[0003] Currently, there are already mature anti-mold products used in aviation equipment, such as aviation fuel anti-mold agents and paint anti-mold agents. Typically, verifying their anti-mold effectiveness in their application environment only requires a mold resistance rating test; meeting the specified requirements is sufficient. Traditional mold resistance rating tests can only determine the growth status of mold within a certain environmental period, and the tests usually use a single mold species, resulting in insufficient coverage and a high degree of subjectivity in the results. Summary of the Invention

[0004] The purpose of this invention is to provide a method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, in order to solve the problem that existing antifungal resistance level tests for verifying the antifungal effect of antifungal products have insufficient coverage and the test results obtained are highly subjective.

[0005] The technical solution of this invention is as follows: This invention provides a method for verifying the effectiveness and shelf life of an aircraft antifungal agent under humid and hot conditions, comprising: Step 1: Conduct an effectiveness test on the antifungal agent, including: collecting microbial strains from aircraft surfaces under humid and hot conditions, evaluating the overall antifungal effect of the antifungal agent, and obtaining the broad-spectrum and potent antifungal activity of the antifungal agent against various strains under humid and hot conditions. Step 2, conduct an expiration test on the antifungal agent, including: using an accelerated corrosion test to evaluate the expiration date of the antifungal agent, and using infrared spectroscopy to monitor the chemical composition of the antifungal agent after the test to determine the expiration date of the antifungal agent.

[0006] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, step 1 includes: Step 11: Collect microorganisms from the aircraft surface under humid and hot conditions, isolate and culture the collected microorganisms, analyze the strains, and prepare spore suspensions of all strains under humid and hot conditions; evaluate the comprehensive anti-mold effect of the anti-mold agent using the inhibition zone test or the mold growth grade test, and observe the broad-spectrum and strong anti-mold properties of the anti-mold agent against each strain under humid and hot conditions based on the evaluation results. Step 12: Conduct material compatibility tests on the anti-mold agent to obtain the effect of the anti-mold agent on composite materials and metal structures on the aircraft.

[0007] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, the implementation method of the inhibition zone test in step 1 is as follows: For liquid antifungal agents, the agent is dropped onto circular filter paper, and the antifungal effect of the agent on bacterial strains under humid and hot conditions is evaluated according to the inhibition zone test method. The antifungal agent on the filter paper forms a ring-shaped inhibition zone on the mold in the container, and the width of the inhibition zone is calculated as follows: H = (Dd) / 2; Where H is the width of the inhibition zone, D is the outer diameter of the mold zone, and d is the diameter of the filter paper. The larger the inhibition zone, the better the antibacterial effect of the antifungal agent.

[0008] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, the implementation method of the mold growth grade test in step 1 is as follows: For anti-mold patches and volatile anti-mold agents, the anti-mold agents are placed in the test space of the aircraft structure. Based on the growth inhibition effect of the anti-mold agent on the growth of each strain, the growth of the strains is rated according to the preset specifications using the mold growth grade test method under humid and hot environment, so as to evaluate the anti-mold effect of the anti-mold agent on the growth inhibition of the strains.

[0009] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, the implementation method of the compatibility test in step 12 is as follows: The materials of each part of the aircraft structure were subjected to compatibility tests with the anti-mold agent in a humid and hot environment to ensure that the anti-mold agent would not cause damage to the surface and physical properties of the materials of each part of the aircraft structure beyond the preset specifications.

[0010] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, the compatibility test in step 12 includes: Step 12-1: Conduct compatibility tests on the anti-mildew agent and insulating coils of various materials; Step 12-2: Test the effect of the antifungal agent on the composite material; Steps 12-3 test the effect of the antifungal agent on the polyurethane coating.

[0011] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, Step 21, determine the accelerated testing scheme, including: compiling the accelerated environment spectrum and preparing multiple test specimens of the aircraft structure, including test specimens treated with anti-mold agents and test specimens not treated with anti-mold agents; Step 22: Accelerated corrosion tests are conducted on various test pieces using accelerated environmental spectroscopy, and the differences between different types of test pieces are observed to obtain the anti-mold effect of the anti-mold agent; Step 23: Determine the effective period of the antifungal agent based on the accelerated environment spectrum used to conduct the accelerated corrosion test and the monitoring results of the chemical composition of the antifungal agent obtained by infrared spectroscopy analysis.

[0012] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, step 21 includes: Taking into account the influence of humid and hot environment, the order of environmental action is consistent with the actual use. By referring to the accelerated test environment and test procedures of the coating of aircraft structure, and drawing on the application process of anti-mildew agent, and combining the actual use of aircraft, an accelerated environment spectrum was compiled. Test specimens were made using materials and coatings commonly used in aircraft structures, combined with the application process of anti-mildew agents.

[0013] Optionally, in the above-described method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, the accelerated corrosion test in step 22 is conducted as follows: The test specimens were subjected to multiple cycles of accelerated environmental spectroscopy in the laboratory. After the test, the test specimens treated with the antifungal agent and those not treated with the antifungal agent were compared to observe the differences in their appearance and whether there was any degree of corrosion damage. Infrared spectroscopy analysis was performed on the surface substances of the test specimens treated with the antifungal agent to see if there were any obvious changes in functional groups.

[0014] The beneficial effects of this invention are as follows: This invention provides a method for verifying the effectiveness and shelf life of an aircraft antifungal agent under humid and hot conditions. The method includes two parts: an effectiveness test and a shelf life test for the antifungal agent. In the effectiveness test, strains of microorganisms on the aircraft surface under humid and hot conditions are obtained to conduct inhibition zone tests and mold growth grade tests. These tests are used to demonstrate the antifungal effects of liquid and volatile antifungal agents on the microorganisms and to verify the compatibility of the antifungal agent with aircraft structural materials. In the shelf life test, accelerated corrosion tests are conducted using a prepared accelerated environmental spectrum and test specimens. Combined with the monitoring results of the antifungal agent's chemical composition obtained from infrared spectroscopy analysis, the shelf life of the antifungal agent is determined.

[0015] The verification method provided in this invention can not only realistically simulate the bacterial strains present in various parts of an aircraft under humid and hot conditions, directly demonstrating the anti-mold effect of the agent through data, but also predict its shelf life, facilitating effective maintenance and repair of relevant aircraft parts. Compared to general mold resistance rating methods, this method can simultaneously evaluate both the effectiveness and shelf life of aircraft anti-mold agents, resulting in a more accurate and comprehensive assessment. This is of great significance for flight safety. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0017] Figure 1 A flowchart illustrating a method for verifying the effectiveness and shelf life of an aircraft antifungal agent under humid and hot conditions, as provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the inhibition zone test of the antifungal agent PT205 in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the compatibility test between the antifungal agent PT205 and the insulated wiring in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the effect of the antifungal agent PT205 on polyurethane coatings in an embodiment of the present invention. Figure 5 This is a schematic diagram of an accelerated corrosion test using the antifungal agent PT205 in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0019] As explained in the background section, mold corrodes and degrades various materials in aircraft, leading to decreased structural strength or functional failure. Currently, the effectiveness of existing anti-mold products in their operating environments is typically verified through mold resistance rating tests. However, these tests have insufficient coverage and may be subjective. For aviation equipment operating in humid and hot coastal environments, the effectiveness and shelf life of the anti-mold agents obtained from the aforementioned mold resistance rating tests are insufficient, and single mold resistance tests have limitations. Currently, the effectiveness and shelf life of these anti-mold products have not been adequately verified, lacking supporting data, especially for equipment operating in humid and hot environments.

[0020] To address the aforementioned issues, this invention provides a method for verifying the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments. By determining the effectiveness and shelf life of aircraft antifungal agents, the method enables effective evaluation of the antifungal agents used.

[0021] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they may not be described again in some embodiments.

[0022] Figure 1 This is a flowchart illustrating a method for verifying the effectiveness and shelf life of an aircraft antifungal agent under humid and hot conditions, as provided in an embodiment of the present invention. Figure 1 As shown, Step 1: Conduct an effectiveness test on the antifungal agent, including: collecting microbial strains from aircraft surfaces under humid and hot conditions, evaluating the overall antifungal effect of the antifungal agent, and obtaining the broad-spectrum and potent antifungal activity of the antifungal agent against various strains under humid and hot conditions. Step 2, conduct an expiration test on the antifungal agent, including: using an accelerated corrosion test to evaluate the expiration date of the antifungal agent, and using infrared spectroscopy to monitor the chemical composition of the antifungal agent after the test to determine the expiration date of the antifungal agent.

[0023] The method for verifying the effectiveness and shelf life of aircraft antifungal agents under humid and hot environments provided in this invention involves the following tests: (1) Effectiveness test Microorganisms were scientifically collected from aircraft surfaces in a humid coastal environment. These microorganisms were isolated, cultured, and analyzed. Spore suspensions of all strains from this environment were then prepared. The overall antifungal effect of the antifungal agent was evaluated using inhibition zone tests or mold growth grading tests. Based on the evaluation results, the broad-spectrum and potent antifungal activity of the antifungal agent against each strain under humid conditions was observed. Furthermore, material compatibility tests were conducted on the antifungal agent to investigate its impact on composite materials and metal structures on aircraft.

[0024] 1.1) Inhibition zone test For liquid antifungal agents, the agent was dropped onto circular filter paper, and the antifungal effect was evaluated against bacterial strains under humid and hot conditions using the inhibition zone test. The antifungal agent on the filter paper formed a ring-shaped inhibition zone against the mold in the container. The width of the inhibition zone, H = (Dd) / 2, was calculated; a larger inhibition zone indicates a better antifungal effect. Here, H is the width of the inhibition zone, D is the outer diameter of the mold zone, and d is the diameter of the filter paper. Additionally, the broad-spectrum and potent antifungal activity of the antifungal agent against various bacterial strains under humid and hot conditions was observed.

[0025] 1.2) Mold growth grade test For anti-mold patches and volatile anti-mold agents, the anti-mold agents are placed in the test space of the aircraft structure. Based on the growth inhibition effect of the anti-mold agent on the growth of each strain, the growth of the strains is rated according to the method specified in GJB150.10 in this humid and hot environment using the mold growth grade test method, thereby evaluating the anti-mold effect of the anti-mold agent on the growth inhibition of the strains.

[0026] 1.3) Compatibility Testing The compatibility tests of the materials used in various parts of the aircraft structure, such as polyimide, polyolefin insulating wiring, aircraft coatings, sealants, and composite materials, with the anti-mold agent were conducted in a humid and hot environment to ensure that the anti-mold agent would not cause damage to the surface and physical properties of the aircraft structural materials beyond certain specifications.

[0027] (2) Shelf life test Because it is difficult to implement in engineering practice to track and measure the corrosion failure process of antifungal agents in the field, this invention primarily uses accelerated corrosion testing to evaluate the shelf life of antifungal agents. Aircraft antifungal agents are mainly located inside the aircraft cabin, where humid air directly affects them. The alternating effects of temperature and humidity cause moisture condensation, accumulating at surface joints and damaging the antifungal agent. Temperature also accelerates the aging of the antifungal agent.

[0028] 2.1) Determine the accelerated testing protocol Accelerated environmental spectrum compilation: Taking into account the influence of humid and hot environments, the order of action should basically conform to the usage conditions. It was compiled by referring to the accelerated testing environment and test procedures of coatings on certain aircraft structures, drawing on the application process of relevant anti-mildew agents, and combining the specific actual usage conditions of the aircraft.

[0029] To investigate the shelf life of aircraft antifungal agents under humid and hot operating environments, commonly used materials and coatings in aircraft structures were selected, and relevant test pieces were fabricated in conjunction with the application process of the antifungal agents. Accelerated corrosion tests were conducted using accelerated environmental spectra, and the shelf life of the antifungal agents was predicted based on the equivalent relationships of typical environmental spectra used in the tests.

[0030] 2.2) Accelerated corrosion test The test specimens were subjected to several cycles of testing in the laboratory according to the accelerated environmental spectrum.

[0031] After the experiment, the test pieces treated with the antifungal agent and those not treated with the antifungal agent were compared to observe the differences in their appearance and whether there was any corrosion damage of different degrees. Infrared spectral analysis was performed on the antifungal agent substance on the surface of the test pieces treated with the antifungal agent to see if there were any obvious changes in functional groups.

[0032] 2.3) Test Results Based on the accelerated environment spectrum used to conduct the accelerated corrosion test, and combined with the monitoring results of the chemical composition of the antifungal agent obtained from infrared spectroscopy analysis, the effective period of use of the antifungal agent is determined.

[0033] This invention provides a method for verifying the effectiveness and shelf life of an aircraft antifungal agent in a humid and hot environment. The method includes two parts: an effectiveness test and a shelf life test. In the effectiveness test, strains of microorganisms on the aircraft surface are obtained under humid and hot conditions to conduct inhibition zone tests and mold growth level tests. These tests are used to demonstrate the antifungal effects of liquid and volatile antifungal agents on the microorganisms and to verify the compatibility of the antifungal agent with aircraft structural materials. In the shelf life test, accelerated corrosion tests are conducted using a prepared accelerated environmental spectrum and test specimens. The results of monitoring the chemical composition of the antifungal agent obtained through infrared spectroscopy analysis are then used to determine the effective shelf life of the antifungal agent.

[0034] The verification method provided in this invention can not only realistically simulate the bacterial strains present in various parts of an aircraft under humid and hot conditions, directly demonstrating the anti-mold effect of the agent through data, but also predict its shelf life, facilitating effective maintenance and repair of relevant aircraft parts. Compared to general mold resistance rating methods, this method can simultaneously evaluate both the effectiveness and shelf life of aircraft anti-mold agents, resulting in a more accurate and comprehensive assessment. This is of great significance for flight safety.

[0035] The following is an illustrative example illustrating the method and implementation of the present invention for verifying the effectiveness and shelf life of an aircraft antifungal agent in a humid and hot environment.

[0036] Implementation Example Commercially available antifungal agent PT205 was selected as the verification research object of the method of this invention to verify the effectiveness and shelf life of the antifungal agent for aircraft under humid and hot environments. The following tests were performed: (1) Inhibition zone test like Figure 2 The diagram shown illustrates the inhibition zone test of the antifungal agent PT205 in an embodiment of the present invention. The inhibition zone test was conducted on multiple mixed bacterial strains collected under a humid and hot environment in a certain location. Figure 2 It can be seen that the antifungal agent PT205 exhibits good antifungal effects against a variety of fungi, and can achieve broad-spectrum antifungal action. Figure 2 The three petri dishes contained different concentrations of antifungal agents to verify the antifungal effect of different concentration gradients. (2) Compatibility test 2.1) Compatibility tests were conducted on the antifungal agent and insulating wiring made of various materials, such as polyimide, polyolefin, polyvinyl chloride, and polytetrafluoroethylene. The following example illustrates the compatibility test between the antifungal agent and the insulating wiring.

[0037] Figure 3 This diagram illustrates the compatibility test between the antifungal agent PT205 and the insulated wiring in an embodiment of the present invention. Different colored coils represent different materials. Approximately 60cm of metal wire was divided into four independent coils. Each coil was placed in a wide-mouthed jar of approximately 120mL. Sufficient antifungal agent was added to the jar to completely cover the coil. The jar was capped and stored at room temperature for 14 days. This procedure was repeated using distilled water as the test medium. At the end of the storage period, the coils were removed and thoroughly rinsed with tap water at room temperature. The coils were suspended and allowed to air dry completely. Each wire was tightly wound around a concentric axis of approximately 3mm and slowly removed, recording any cracks appearing at the insulator and their number.

[0038] After the winding test, peel off approximately 2 cm of fluoroplastic from both ends of the wire. Twist the exposed metal ends together and connect them to one electrode of an electric spark detector. Most of the wire without the fluoroplastic removed is immersed in a 5% NaCl solution. Turn on the detector's power switch and insert the other electrode into the 5% NaCl solution. Adjust the voltage to 2500V and maintain it for 1 minute. If an alarm is triggered or a spark is generated, it indicates a leakage current.

[0039] Test results: No cracking, no contamination, no decomposition, no leakage.

[0040] 2.2) The effect of mildew inhibitors on composite materials Composite material test specimens were prepared according to GB / T7124-2008 requirements, immersed in a mildew inhibitor for 48 hours, and the effect of the mildew inhibitor on the composite material was tested, mainly examining the appearance and tensile shear strength.

[0041] Test results: Tensile strength before immersion: 6.0 MPa; Tensile strength after immersion: 6.20 MPa.

[0042] 2.3) The effect of mildew inhibitors on polyurethane coatings Preparation process of coated test specimens: Apply TB06-9 primer to an aluminum test specimen with a thickness of (1-3) mm, and then apply a white full-gloss polyurethane topcoat. The coating direction should be consistent with the specified direction. Drying should take at least 4 weeks. Apply an anti-mold agent to one side of a horizontally placed test specimen, and simultaneously coat the side edge. Test the anti-mold agent in an oven at 40℃. After 30 minutes, remove the test specimen from the oven and remove the anti-mold agent with a cleaning agent. After 24 hours, inspect the test specimen and test the pencil hardness on both sides. Scratches, fading, blistering, or a decrease in pencil hardness of more than 1 unit are considered as unqualified. Figure 4 The diagram shown is a schematic diagram of the effect test of antifungal agent PT205 on polyurethane coating in an embodiment of the present invention.

[0043] Test results: No cracks, fissures, or discoloration.

[0044] (3) Accelerated corrosion test The test specimen was subjected to a three-cycle test in the laboratory according to a certain accelerated environment spectrum, and no significant changes were observed on the surface of the test specimen.

[0045] Based on the equivalence relationship of accelerated environmental spectra, combined with infrared monitoring results of the chemical composition of the antifungal agent, and the results of a unit's natural exposure test under typical humid and hot conditions, the antifungal agent's shelf life under humid and hot conditions is approximately one year. Figure 5 The diagram shown is a schematic of an accelerated corrosion test conducted using the antifungal agent PT205 in an embodiment of the present invention. The above tests have verified that the environmental verification test provided by this invention, which can be used to assess the effectiveness and shelf life of aircraft antifungal agents in humid and hot environments, can simultaneously evaluate both the effectiveness and shelf life of aircraft antifungal agents compared to the general antifungal resistance rating method, resulting in a more accurate and comprehensive evaluation. This is of great significance to the flight safety of aircraft.

[0046] While the embodiments disclosed in this invention are as described above, they are merely illustrative of the embodiments to facilitate understanding of the invention and are not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for verifying the effectiveness and shelf life of an aircraft antifungal agent used in humid and hot environments, characterized in that, include: Step 1: Conduct an effectiveness test on the antifungal agent, including: collecting microbial strains from aircraft surfaces under humid and hot conditions, evaluating the overall antifungal effect of the antifungal agent, and obtaining the broad-spectrum and potent antifungal activity of the antifungal agent against various strains under humid and hot conditions. Step 2, conduct an expiration test on the antifungal agent, including: using an accelerated corrosion test to evaluate the expiration date of the antifungal agent, and using infrared spectroscopy to monitor the chemical composition of the antifungal agent after the test to determine the expiration date of the antifungal agent.

2. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 1, characterized in that, Step 1 includes: Step 11: Collect microorganisms from the aircraft surface under humid and hot conditions, isolate and culture the collected microorganisms, analyze the strains, and prepare spore suspensions of all strains under humid and hot conditions; evaluate the comprehensive anti-mold effect of the anti-mold agent using the inhibition zone test or the mold growth grade test, and observe the broad-spectrum and strong anti-mold properties of the anti-mold agent against each strain under humid and hot conditions based on the evaluation results. Step 12: Conduct material compatibility tests on the anti-mold agent to obtain the effect of the anti-mold agent on composite materials and metal structures on the aircraft.

3. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 2, characterized in that, The implementation method of the inhibition zone test in step 1 is as follows: For liquid antifungal agents, the agent is dropped onto circular filter paper, and the antifungal effect of the agent on bacterial strains under humid and hot conditions is evaluated according to the inhibition zone test method. The antifungal agent on the filter paper forms a ring-shaped inhibition zone on the mold in the container, and the width of the inhibition zone is calculated as follows: H = (Dd) / 2; Where H is the width of the inhibition zone, D is the outer diameter of the mold zone, and d is the diameter of the filter paper. The larger the inhibition zone, the better the antibacterial effect of the antifungal agent.

4. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 2, characterized in that, The implementation method for the mold growth grade test in step 1 is as follows: For anti-mold patches and volatile anti-mold agents, the anti-mold agents are placed in the test space of the aircraft structure. Based on the growth inhibition effect of the anti-mold agent on the growth of each strain, the growth of the strains is rated according to the preset specifications using the mold growth grade test method under humid and hot environment, so as to evaluate the anti-mold effect of the anti-mold agent on the growth inhibition of the strains.

5. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 2, characterized in that, The compatibility test in step 12 is implemented as follows: The materials of each part of the aircraft structure were subjected to compatibility tests with the anti-mold agent in a humid and hot environment to ensure that the anti-mold agent would not cause damage to the surface and physical properties of the materials of each part of the aircraft structure beyond the preset specifications.

6. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 2, characterized in that, The compatibility test in step 12 includes: Step 12-1: Conduct compatibility tests on the anti-mildew agent and insulating coils of various materials; Step 12-2: Test the effect of the antifungal agent on the composite material; Steps 12-3 test the effect of the antifungal agent on the polyurethane coating.

7. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to any one of claims 1 to 6, characterized in that, Step 21, determine the accelerated testing scheme, including: compiling the accelerated environment spectrum and preparing multiple test specimens of the aircraft structure, including test specimens treated with anti-mold agents and test specimens not treated with anti-mold agents; Step 22: Accelerated corrosion tests are conducted on various test pieces using accelerated environmental spectroscopy, and the differences between different types of test pieces are observed to obtain the anti-mold effect of the anti-mold agent; Step 23: Determine the effective period of the antifungal agent based on the accelerated environment spectrum used to conduct the accelerated corrosion test and the monitoring results of the chemical composition of the antifungal agent obtained by infrared spectroscopy analysis.

8. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 7, characterized in that, Step 21 includes: Taking into account the influence of humid and hot environment, the order of environmental action is consistent with the actual use. By referring to the accelerated test environment and test procedures of the coating of aircraft structure, and drawing on the application process of anti-mildew agent, and combining the actual use of aircraft, an accelerated environment spectrum was compiled. Test specimens were made using materials and coatings commonly used in aircraft structures, combined with the application process of anti-mildew agents.

9. The method for verifying the effectiveness and shelf life of the aircraft antifungal agent under humid and hot conditions according to claim 7, characterized in that, The accelerated corrosion test in step 22 is conducted as follows: The test specimens were subjected to multiple cycles of accelerated environmental spectroscopy in the laboratory. After the test, the test specimens treated with the antifungal agent and those not treated with the antifungal agent were compared to observe the differences in their appearance and whether there was any degree of corrosion damage. Infrared spectroscopy analysis was performed on the surface substances of the test specimens treated with the antifungal agent to see if there were any obvious changes in functional groups.

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