The anti-corrosion of aviation piston engine is an important link to ensure the normal operation and prolong the service life of the engine. The following are the corrosion prevention points of aviation piston engines:
First, material selection and surface treatment
Use corrosion-resistant materials
The key components of the engine, such as cylinder, ring, piston pin, etc., should be made of materials with good corrosion resistance. For example, the piston is usually made of aluminum alloy with good thermal conductivity and sufficient strength, which can quickly generate an oxide film in the atmosphere and has certain self-passivation characteristics.
Surface treatment technology
Electroplating: The plating of a corrosion-resistant metal, such as cadmium, on the surface of a metal to improve its corrosion resistance.
Anodizing: A thick and dense anticorrosive film is formed on the surface of the aluminum alloy to effectively prevent acid from corroding the piston. This process costs less and requires less qualification of equipment and personnel.
Corrosion inhibitor: A corrosion inhibitor is applied to the surface of the metal to slow the rate of corrosion.
Second, lubrication and maintenance
Keep lubricated
The lubricating oil system of the engine should be kept clean and smooth to ensure that all components are fully lubricated. The oil not only reduces friction and wear, but also forms a protective film on the metal surface to isolate the corrosive medium.
Change the oil regularly
Lubricating oil will gradually age and deteriorate during use, and lose lubrication and anti-corrosion effects. Therefore, the lubricating oil should be changed regularly and the appropriate lubricating oil type should be selected according to the manufacturer’s recommendation.
Engine warm-up and operation
In areas with high humidity or after a long time of parking, the engine should be preheated before starting to remove moisture and moisture from the surface of the components. In addition, running the engine regularly also helps to keep its interior dry, reducing the occurrence of corrosion.
Third, environmental control
moisture-proof
The engine parking environment should be kept dry to avoid moisture and moisture intrusion. A desiccant or dehumidifier can be used to reduce ambient humidity.
Avoid corrosive gases
The engine should be away from corrosive gases, such as sulfuric acid, hydrochloric acid, etc. Necessary sealing and isolation measures shall be taken during transportation and storage.
ventilation
The engine storage area should be maintained with good ventilation conditions to reduce the accumulation of corrosive gases and moisture.
Fourth, regular inspection and maintenance
Visual inspection
Check the appearance of the engine regularly for corrosion, oil leaks, or other abnormal conditions. If corrosion is found, it should be treated in time.
Internal inspection
When the engine is overhauled or inspected, its internal components should be inspected in detail to assess the corrosion situation and take appropriate repair measures.
Record and trace
Establish engine corrosion prevention records, record corrosion inspection, treatment and maintenance. This helps to track the development trend of corrosion and provides reference for the subsequent anti-corrosion work.
Fifth, anti-corrosion measures in special environments
Marine environment
In the special environment of the ocean atmosphere, the engine is more vulnerable to salt spray, moisture and corrosive gas erosion. Therefore, more stringent anti-corrosion measures should be taken, such as using materials with better corrosion resistance and increasing the thickness of the coating.
High temperature environment
In high temperature environment, engine components are prone to thermal corrosion. At this time, coatings and materials with high temperature corrosion resistance should be selected, and cooling and heat dissipation measures should be strengthened.
Low temperature environment
At low temperature, engine components are prone to condensation corrosion. At this time, it should be ensured that the inside of the engine is dry, and appropriate preheating and insulation measures should be taken.
Sixth, training and awareness raising
Train maintenance personnel
Train engine maintenance personnel on anti-corrosion knowledge, so that they understand the cause of corrosion, harm and preventive measures. This helps to improve the anti-corrosion awareness and skill level of maintenance personnel.
Build a culture of corrosion prevention
Establish a culture of anti-corrosion within the enterprise and emphasize the importance of anti-corrosion work. By holding regular anti-corrosion knowledge lectures, sharing anti-corrosion cases and experiences, improve the anti-corrosion awareness of all employees.
In summary, the anti-corrosion work of aviation piston engines needs to start from many aspects such as material selection and surface treatment, lubrication and maintenance, environmental control, regular inspection and maintenance, anti-corrosion measures in special environments, and training and awareness raising. Only comprehensive anti-corrosion work can ensure the normal operation of the engine and extend the service life.
Jiangsu Jiapei Technology Development Co., Ltd. was established on March 19, 2021, with its registered address at Room 801, International Automobile City Auto Trade Center, No. 699 Taizhou Avenue, Taizhou Medical High tech Industrial Development Zone. The legal representative is Zhi Zhen.
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