The anti-rust treatment of aviation piston engine is very important to ensure the normal operation and prolong the service life of the engine. The following are the key points of anti-rust treatment of aviation piston engines:
First, the basic principles of anti-rust treatment
The core of anti-rust treatment is to isolate the contact between metal and corrosion factors such as moisture and oxygen to prevent the occurrence of corrosion reactions. Therefore, rust prevention treatment should follow the following basic principles:
Moisture-proof: Use desiccant or moisture-proof measures to maintain a dry environment inside the engine.
Isolation of corrosive media: Use anti-rust agents, anti-rust coatings or vapor-phase anti-rust materials to isolate the metal surface from the corrosive media.
Second, the specific measures of anti-rust treatment
Use desiccant:
During engine parking, a desiccant is used to absorb moisture from the air and reduce the humidity inside the engine.
Desiccant should be replaced regularly to maintain its hygroscopic properties.
Gas phase rust prevention treatment:
The volatile antirust gas of the gas phase antirust material can be tightly adsorbed on the metal surface to form a protective film to prevent corrosion.
According to the length of parking time, choose the appropriate gas phase rust prevention materials and packaging methods. For example, rust prevention less than 1 month can be packed with Branno M3 gas phase rust prevention bag; 1-3 months of rust prevention need to add montmorillonite or high moisture absorption desiccant; 3-6 months of anti-rust not only to increase the thickness of anti-rust bag, but also recommended desiccant selection of high moisture absorption type; More than 6 months of anti-rust, you need to use U-shaped anti-rust paper on the basis of the former.
All anti-rust packaging should be tightly sealed to prevent leakage of anti-rust gas and external moisture.
Apply anti-rust agent or anti-rust grease:
Before the engine is parked, apply anti-rust agent or anti-rust grease to rust-prone parts to form a protective film to prevent corrosion.
Rust-proof agents or rust-proof oils should be replaced or supplemented regularly to maintain their rust-proof properties.
Oil seal storage:
For long-term parked engines, oil seal storage should be carried out. This includes draining the original oil, adding the oil seal oil, running the engine to the normal oil temperature, and then injecting the oil seal oil into the cylinder, and installing a moisture-proof plug and desiccant.
During the storage of the oil seal, the quality and liquid level of the oil seal should be checked regularly to ensure its effectiveness.
Third, precautions for anti-rust treatment
Cleaning treatment:
Before rust prevention, the engine should be thoroughly cleaned to remove surface dirt, oil and oxide.
Proper cleaning agents and tools should be used during cleaning to avoid damage to engine components.
Regular inspection:
During the engine parking period, the effect of anti-rust treatment and the state of the engine should be checked regularly.
If it is found that the anti-rust treatment fails or the engine parts rust, measures should be taken in time to deal with it.
Follow the operating procedures:
When rust prevention is performed, the engine manufacturer’s recommended operating procedures and maintenance precautions should be followed.
Avoid using uncertified rust-proof materials and tools to avoid damage to the engine.
Fourth, the effect evaluation of anti-rust treatment
Appearance inspection:
By looking at the appearance of the engine components, assess whether they are corroded.
If rust is found, timely measures should be taken to deal with it.
Performance test:
Before the engine is reactivated, the necessary performance tests are carried out to assess its performance and reliability.
If the performance deteriorates or an exception occurs, locate the cause and rectify the fault in time.
To sum up, the anti-rust treatment of aviation piston engine is a comprehensive process, which needs to consider many aspects comprehensively. By taking appropriate anti-rust treatment measures and precautions, the rust phenomenon of engine components can be effectively prevented, to ensure the normal operation of the engine and extend the service life.
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